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Case study of a DOE 2021 Housing Innovation Award winning custom home in a marine climate that got a HERS -22 with PV, with 2,614 square feet, triple-pane windows, LED lighting, and heat recovery ventilator with a HEPA filter and CO2 sensor.
Case study of a DOE 2020 Housing Innovation Award winning custom home in a cold climate that got a HERS -19 with PV, with 2,538 square feet and a large south-facing roof, which is designed to hold over 80 solar panels, and the large south-facing windows, bringing in sunlight to warm the concrete floors and provide passive solar heating.
Tc6BiO18 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are twelve inequivalent Tc+5.50+ sites. In the first Tc+5.50+ site, Tc+5.50+ is bonded to six O2- atoms to form corner-sharing TcO6 octahedra. The corner-sharing octahedra tilt angles range from 30–41°. There are a spread of Tc–O bond distances ranging from 1.84–2.03 Å. In the second Tc+5.50+ site, Tc+5.50+ is bonded to six O2- atoms to form corner-sharing TcO6 octahedra. The corner-sharing octahedra tilt angles range from 31–54°. There are a spread of Tc–O bond distances ranging from 1.81–2.12 Å. In the third Tc+5.50+ site, Tc+5.50+ is bonded to six O2- atoms to form corner-sharing TcO6 octahedra. The corner-sharing octahedra tilt angles range from 28–52°. There are a spread of Tc–O bond distances ranging from 1.84–2.07 Å. In the fourth Tc+5.50+ site, Tc+5.50+ is bonded to six O2- atoms to form corner-sharing TcO6 octahedra. The corner-sharing octahedra tilt angles range from 30–52°. There are a spread of Tc–O bond distances ranging from 1.84–2.06 Å. In the fifth Tc+5.50+ site, Tc+5.50+ is bonded to six O2- atoms to form corner-sharing TcO6 octahedra. The corner-sharing octahedra tilt angles range from 30–53°. There are a spread of Tc–O bond distances ranging from 1.86–2.06 Å. In the sixth Tc+5.50+ site, Tc+5.50+ is bonded to six O2- atoms to form corner-sharing TcO6 octahedra. The corner-sharing octahedra tilt angles range from 28–52°. There are a spread of Tc–O bond distances ranging from 1.88–2.01 Å. In the seventh Tc+5.50+ site, Tc+5.50+ is bonded to six O2- atoms to form corner-sharing TcO6 octahedra. The corner-sharing octahedra tilt angles range from 31–52°. There are a spread of Tc–O bond distances ranging from 1.84–2.14 Å. In the eighth Tc+5.50+ site, Tc+5.50+ is bonded to six O2- atoms to form corner-sharing TcO6 octahedra. The corner-sharing octahedra tilt angles range from 31–38°. There are a spread of Tc–O bond distances ranging from 1.85–2.00 Å. In the ninth Tc+5.50+ site, Tc+5.50+ is bonded to six O2- atoms to form corner-sharing TcO6 octahedra. The corner-sharing octahedra tilt angles range from 30–53°. There are a spread of Tc–O bond distances ranging from 1.85–2.08 Å. In the tenth Tc+5.50+ site, Tc+5.50+ is bonded to six O2- atoms to form corner-sharing TcO6 octahedra. The corner-sharing octahedra tilt angles range from 25–53°. There are a spread of Tc–O bond distances ranging from 1.87–2.01 Å. In the eleventh Tc+5.50+ site, Tc+5.50+ is bonded to six O2- atoms to form corner-sharing TcO6 octahedra. The corner-sharing octahedra tilt angles range from 25–54°. There are a spread of Tc–O bond distances ranging from 1.83–2.09 Å. In the twelfth Tc+5.50+ site, Tc+5.50+ is bonded to six O2- atoms to form corner-sharing TcO6 octahedra. The corner-sharing octahedra tilt angles range from 30–53°. There are a spread of Tc–O bond distances ranging from 1.86–2.04 Å. There are two inequivalent Bi3+ sites. In the first Bi3+ site, Bi3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Bi–O bond distances ranging from 2.16–2.97 Å. In the second Bi3+ site, Bi3+ is bonded in a distorted hexagonal planar geometry to six O2- atoms. There are a spread of Bi–O bond distances ranging from 2.19–2.87 Å. There are thirty-six inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to two Tc+5.50+ atoms. In the second O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to two Tc+5.50+ and one Bi3+ atom. In the third O2- site, O2- is bonded in a bent 150 degrees geometry to two Tc+5.50+ atoms. In the fourth O2- site, O2- is bonded in a bent 150 degrees geometry to two Tc+5.50+ atoms. In the fifth O2- site, O2- is bonded in a bent 150 degrees geometry to two Tc+5.50+ atoms. In the sixth O2- site, O2- is bonded in a 2-coordinate geometry to two Tc+5.50+ and one Bi3+ atom. In the seventh O2- site, O2- is bonded in a bent 150 degrees geometry to two Tc+5.50+ atoms. In the eighth O2- site, O2- is bonded in a bent 150 degrees geometry to two Tc+5.50+ atoms. In the ninth O2- site, O2- is bonded in a bent 150 degrees geometry to two Tc+5.50+ atoms. In the tenth O2- site, O2- is bonded in a bent 150 degrees geometry to two Tc+5.50+ atoms. In the eleventh O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two Tc+5.50+ and one Bi3+ atom. In the twelfth O2- site, O2- is bonded in a bent 150 degrees geometry to two Tc+5.50+ atoms. In the thirteenth O2- site, O2- is bonded in a bent 150 degrees geometry to two Tc+5.50+ atoms. In the fourteenth O2- site, O2- is bonded in a bent 150 degrees geometry to two Tc+5.50+ atoms. In the fifteenth O2- site, O2- is bonded in a 3-coordinate geometry to two Tc+5.50+ and one Bi3+ atom. In the sixteenth O2- site, O2- is bonded in a 2-coordinate geometry to two Tc+5.50+ and one Bi3+ atom. In the seventeenth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to two Tc+5.50+ and one Bi3+ atom. In the eighteenth O2- site, O2- is bonded in a bent 150 degrees geometry to two Tc+5.50+ atoms. In the nineteenth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to two Tc+5.50+ and one Bi3+ atom. In the twentieth O2- site, O2- is bonded in a bent 150 degrees geometry to two Tc+5.50+ atoms. In the twenty-first O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two Tc+5.50+ and one Bi3+ atom. In the twenty-second O2- site, O2- is bonded in a 2-coordinate geometry to two Tc+5.50+ and one Bi3+ atom. In the twenty-third O2- site, O2- is bonded in a bent 150 degrees geometry to two Tc+5.50+ atoms. In the twenty-fourth O2- site, O2- is bonded in a bent 150 degrees geometry to two Tc+5.50+ atoms. In the twenty-fifth O2- site, O2- is bonded in a bent 150 degrees geometry to two Tc+5.50+ atoms. In the twenty-sixth O2- site, O2- is bonded in a bent 150 degrees geometry to two Tc+5.50+ atoms. In the twenty-seventh O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to two Tc+5.50+ and one Bi3+ atom. In the twenty-eighth O2- site, O2- is bonded in a bent 150 degrees geometry to two Tc+5.50+ atoms. In the twenty-ninth O2- site, O2- is bonded in a bent 150 degrees geometry to two Tc+5.50+ atoms. In the thirtieth O2- site, O2- is bonded in a bent 150 degrees geometry to two Tc+5.50+ atoms. In the thirty-first O2- site, O2- is bonded in a bent 150 degrees geometry to two Tc+5.50+ atoms. In the thirty-second O2- site, O2- is bonded in a 3-coordinate geometry to two Tc+5.50+ and one Bi3+ atom. In the thirty-third O2- site, O2- is bonded in a bent 150 degrees geometry to two Tc+5.50+ atoms. In the thirty-fourth O2- site, O2- is bonded in a 2-coordinate geometry to two Tc+5.50+ and one Bi3+ atom. In the thirty-fifth O2- site, O2- is bonded in a bent 150 degrees geometry to two Tc+5.50+ atoms. In the thirty-sixth O2- site, O2- is bonded in a bent 150 degrees geometry to two Tc+5.50+ atoms.
Tc3Pd crystallizes in the trigonal R-3m space group. The structure is three-dimensional. there are seven inequivalent Tc+0.67- sites. In the first Tc+0.67- site, Tc+0.67- is bonded to nine Tc+0.67- and three equivalent Pd2+ atoms to form a mixture of edge, face, and corner-sharing TcTc9Pd3 cuboctahedra. There are three shorter (2.72 Å) and six longer (2.74 Å) Tc–Tc bond lengths. All Tc–Pd bond lengths are 2.81 Å. In the second Tc+0.67- site, Tc+0.67- is bonded to twelve Tc+0.67- atoms to form TcTc12 cuboctahedra that share corners with six equivalent TcTc12 cuboctahedra, edges with eighteen TcTc9Pd3 cuboctahedra, and faces with eighteen TcTc9Pd3 cuboctahedra. All Tc–Tc bond lengths are 2.74 Å. In the third Tc+0.67- site, Tc+0.67- is bonded to nine Tc+0.67- and three equivalent Pd2+ atoms to form a mixture of edge, face, and corner-sharing TcTc9Pd3 cuboctahedra. There are three shorter (2.72 Å) and six longer (2.74 Å) Tc–Tc bond lengths. All Tc–Pd bond lengths are 2.81 Å. In the fourth Tc+0.67- site, Tc+0.67- is bonded to sixteen Tc+0.67- atoms to form a mixture of edge, face, and corner-sharing TcTc16 cuboctahedra. There are a spread of Tc–Tc bond distances ranging from 2.72–5.48 Å. In the fifth Tc+0.67- site, Tc+0.67- is bonded to nine Tc+0.67- and three equivalent Pd2+ atoms to form TcTc9Pd3 cuboctahedra that share corners with seventeen TcTc9Pd3 cuboctahedra, edges with sixteen TcTc9Pd3 cuboctahedra, and faces with fifteen TcTc16 cuboctahedra. All Tc–Tc bond lengths are 2.74 Å. All Tc–Pd bond lengths are 2.81 Å. In the sixth Tc+0.67- site, Tc+0.67- is bonded to twelve Tc+0.67- atoms to form TcTc12 cuboctahedra that share corners with eleven TcTc13Pd3 cuboctahedra, edges with sixteen TcTc9Pd3 cuboctahedra, and faces with twenty-one TcTc13Pd3 cuboctahedra. There are six shorter (2.72 Å) and six longer (2.74 Å) Tc–Tc bond lengths. In the seventh Tc+0.67- site, Tc+0.67- is bonded to thirteen Tc+0.67- and three equivalent Pd2+ atoms to form TcTc13Pd3 cuboctahedra that share corners with seventeen TcTc9Pd3 cuboctahedra, edges with twenty TcTc9Pd3 cuboctahedra, and faces with twenty-five TcTc13Pd3 cuboctahedra. There are a spread of Tc–Tc bond distances ranging from 2.74–5.48 Å. All Tc–Pd bond lengths are 2.81 Å. There are two inequivalent Pd2+ sites. In the first Pd2+ site, Pd2+ is bonded in a 6-coordinate geometry to six equivalent Tc+0.67- atoms. In the second Pd2+ site, Pd2+ is bonded in a 6-coordinate geometry to six Tc+0.67- atoms.
TcZn7 crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Tc is bonded to twelve Zn atoms to form TcZn12 cuboctahedra that share corners with twelve equivalent TcZn12 cuboctahedra, edges with twenty-four ZnZn10Tc2 cuboctahedra, and faces with eighteen ZnZn10Tc2 cuboctahedra. All Tc–Zn bond lengths are 2.74 Å. There are twenty-five inequivalent Zn sites. In the first Zn site, Zn is bonded to two equivalent Tc and ten Zn atoms to form ZnZn10Tc2 cuboctahedra that share corners with twelve ZnZn10Tc2 cuboctahedra, edges with four equivalent TcZn12 cuboctahedra, edges with twenty ZnZn10Tc2 cuboctahedra, faces with two equivalent TcZn12 cuboctahedra, and faces with sixteen ZnZn10Tc2 cuboctahedra. All Zn–Zn bond lengths are 2.74 Å. In the second Zn site, Zn is bonded to two equivalent Tc and ten Zn atoms to form ZnZn10Tc2 cuboctahedra that share corners with twelve ZnZn10Tc2 cuboctahedra, edges with four equivalent TcZn12 cuboctahedra, edges with twenty ZnZn10Tc2 cuboctahedra, faces with two equivalent TcZn12 cuboctahedra, and faces with sixteen ZnZn10Tc2 cuboctahedra. All Zn–Zn bond lengths are 2.74 Å. In the third Zn site, Zn is bonded to two equivalent Tc and ten Zn atoms to form ZnZn10Tc2 cuboctahedra that share corners with twelve ZnZn10Tc2 cuboctahedra, edges with four equivalent TcZn12 cuboctahedra, edges with twenty ZnZn10Tc2 cuboctahedra, faces with two equivalent TcZn12 cuboctahedra, and faces with sixteen ZnZn10Tc2 cuboctahedra. All Zn–Zn bond lengths are 2.74 Å. In the fourth Zn site, Zn is bonded to two equivalent Tc and ten Zn atoms to form ZnZn10Tc2 cuboctahedra that share corners with twelve ZnZn10Tc2 cuboctahedra, edges with four equivalent TcZn12 cuboctahedra, edges with twenty ZnZn12 cuboctahedra, faces with two equivalent TcZn12 cuboctahedra, and faces with sixteen ZnZn10Tc2 cuboctahedra. All Zn–Zn bond lengths are 2.74 Å. In the fifth Zn site, Zn is bonded to two equivalent Tc and ten Zn atoms to form ZnZn10Tc2 cuboctahedra that share corners with twelve ZnZn10Tc2 cuboctahedra, edges with four equivalent TcZn12 cuboctahedra, edges with twenty ZnZn10Tc2 cuboctahedra, faces with two equivalent TcZn12 cuboctahedra, and faces with sixteen ZnZn10Tc2 cuboctahedra. All Zn–Zn bond lengths are 2.74 Å. In the sixth Zn site, Zn is bonded to two equivalent Tc and ten Zn atoms to form ZnZn10Tc2 cuboctahedra that share corners with twelve ZnZn10Tc2 cuboctahedra, edges with four equivalent TcZn12 cuboctahedra, edges with twenty ZnZn10Tc2 cuboctahedra, faces with two equivalent TcZn12 cuboctahedra, and faces with sixteen ZnZn10Tc2 cuboctahedra. All Zn–Zn bond lengths are 2.74 Å. In the seventh Zn site, Zn is bonded to twelve Zn atoms to form ZnZn12 cuboctahedra that share corners with twelve equivalent ZnZn12 cuboctahedra, edges with twenty-four ZnZn10Tc2 cuboctahedra, faces with six equivalent TcZn12 cuboctahedra, and faces with twelve ZnZn10Tc2 cuboctahedra. All Zn–Zn bond lengths are 2.74 Å. In the eighth Zn site, Zn is bonded to two equivalent Tc and ten Zn atoms to form ZnZn10Tc2 cuboctahedra that share corners with twelve ZnZn10Tc2 cuboctahedra, edges with four equivalent TcZn12 cuboctahedra, edges with twenty ZnZn10Tc2 cuboctahedra, faces with two equivalent TcZn12 cuboctahedra, and faces with sixteen ZnZn10Tc2 cuboctahedra. All Zn–Zn bond lengths are 2.74 Å. In the ninth Zn site, Zn is bonded to two equivalent Tc and ten Zn atoms to form ZnZn10Tc2 cuboctahedra that share corners with twelve ZnZn10Tc2 cuboctahedra, edges with four equivalent TcZn12 cuboctahedra, edges with twenty ZnZn10Tc2 cuboctahedra, faces with two equivalent TcZn12 cuboctahedra, and faces with sixteen ZnZn10Tc2 cuboctahedra. All Zn–Zn bond lengths are 2.74 Å. In the tenth Zn site, Zn is bonded to two equivalent Tc and ten Zn atoms to form ZnZn10Tc2 cuboctahedra that share corners with twelve ZnZn10Tc2 cuboctahedra, edges with four equivalent TcZn12 cuboctahedra, edges with twenty ZnZn12 cuboctahedra, faces with two equivalent TcZn12 cuboctahedra, and faces with sixteen ZnZn10Tc2 cuboctahedra. Both Zn–Tc bond lengths are 2.74 Å. All Zn–Zn bond lengths are 2.74 Å. In the eleventh Zn site, Zn is bonded to two equivalent Tc and ten Zn atoms to form ZnZn10Tc2 cuboctahedra that share corners with twelve ZnZn10Tc2 cuboctahedra, edges with four equivalent TcZn12 cuboctahedra, edges with twenty ZnZn10Tc2 cuboctahedra, faces with two equivalent TcZn12 cuboctahedra, and faces with sixteen ZnZn10Tc2 cuboctahedra. Both Zn–Tc bond lengths are 2.74 Å. All Zn–Zn bond lengths are 2.74 Å. In the twelfth Zn site, Zn is bonded to two equivalent Tc and ten Zn atoms to form ZnZn10Tc2 cuboctahedra that share corners with twelve ZnZn10Tc2 cuboctahedra, edges with four equivalent TcZn12 cuboctahedra, edges with twenty ZnZn10Tc2 cuboctahedra, faces with two equivalent TcZn12 cuboctahedra, and faces with sixteen ZnZn10Tc2 cuboctahedra. Both Zn–Tc bond lengths are 2.74 Å. Both Zn–Zn bond lengths are 2.74 Å. In the thirteenth Zn site, Zn is bonded to two equivalent Tc and ten Zn atoms to form ZnZn10Tc2 cuboctahedra that share corners with twelve ZnZn10Tc2 cuboctahedra, edges with four equivalent TcZn12 cuboctahedra, edges with twenty ZnZn10Tc2 cuboctahedra, faces with two equivalent TcZn12 cuboctahedra, and faces with sixteen ZnZn10Tc2 cuboctahedra. Both Zn–Tc bond lengths are 2.74 Å. Both Zn–Zn bond lengths are 2.74 Å. In the fourteenth Zn site, Zn is bonded to two equivalent Tc and ten Zn atoms to form ZnZn10Tc2 cuboctahedra that share corners with twelve ZnZn10Tc2 cuboctahedra, edges with four equivalent TcZn12 cuboctahedra, edges with twenty ZnZn10Tc2 cuboctahedra, faces with two equivalent TcZn12 cuboctahedra, and faces with sixteen ZnZn10Tc2 cuboctahedra. Both Zn–Tc bond lengths are 2.74 Å. All Zn–Zn bond lengths are 2.74 Å. In the fifteenth Zn site, Zn is bonded to two equivalent Tc and ten Zn atoms to form ZnZn10Tc2 cuboctahedra that share corners with twelve ZnZn10Tc2 cuboctahedra, edges with four equivalent TcZn12 cuboctahedra, edges with twenty ZnZn10Tc2 cuboctahedra, faces with two equivalent TcZn12 cuboctahedra, and faces with sixteen ZnZn10Tc2 cuboctahedra. Both Zn–Tc bond lengths are 2.74 Å. All Zn–Zn bond lengths are 2.74 Å. In the sixteenth Zn site, Zn is bonded to two equivalent Tc and ten Zn atoms to form ZnZn10Tc2 cuboctahedra that share corners with twelve ZnZn10Tc2 cuboctahedra, edges with four equivalent TcZn12 cuboctahedra, edges with twenty ZnZn10Tc2 cuboctahedra, faces with two equivalent TcZn12 cuboctahedra, and faces with sixteen ZnZn10Tc2 cuboctahedra. All Zn–Zn bond lengths are 2.74 Å. In the seventeenth Zn site, Zn is bonded to two equivalent Tc and ten Zn atoms to form ZnZn10Tc2 cuboctahedra that share corners with twelve ZnZn10Tc2 cuboctahedra, edges with four equivalent TcZn12 cuboctahedra, edges with twenty ZnZn10Tc2 cuboctahedra, faces with two equivalent TcZn12 cuboctahedra, and faces with sixteen ZnZn10Tc2 cuboctahedra. All Zn–Zn bond lengths are 2.74 Å. In the eighteenth Zn site, Zn is bonded to two equivalent Tc and ten Zn atoms to form ZnZn10Tc2 cuboctahedra that share corners with twelve ZnZn10Tc2 cuboctahedra, edges with four equivalent TcZn12 cuboctahedra, edges with twenty ZnZn10Tc2 cuboctahedra, faces with two equivalent TcZn12 cuboctahedra, and faces with sixteen ZnZn10Tc2 cuboctahedra. Both Zn–Tc bond lengths are 2.74 Å. All Zn–Zn bond lengths are 2.74 Å. In the nineteenth Zn site, Zn is bonded to two equivalent Tc and ten Zn atoms to form ZnZn10Tc2 cuboctahedra that share corners with twelve ZnZn10Tc2 cuboctahedra, edges with four equivalent TcZn12 cuboctahedra, edges with twenty ZnZn10Tc2 cuboctahedra, faces with two equivalent TcZn12 cuboctahedra, and faces with sixteen ZnZn10Tc2 cuboctahedra. Both Zn–Tc bond lengths are 2.74 Å. All Zn–Zn bond lengths are 2.74 Å. In the twentieth Zn site, Zn is bonded to two equivalent Tc and ten Zn atoms to form ZnZn10Tc2 cuboctahedra that share corners with twelve ZnZn10Tc2 cuboctahedra, edges with four equivalent TcZn12 cuboctahedra, edges with twenty ZnZn10Tc2 cuboctahedra, faces with two equivalent TcZn12 cuboctahedra, and faces with sixteen ZnZn10Tc2 cuboctahedra. Both Zn–Tc bond lengths are 2.74 Å. All Zn–Zn bond lengths are 2.74 Å. In the twenty-first Zn site, Zn is bonded to two equivalent Tc and ten Zn atoms to form ZnZn10Tc2 cuboctahedra that share corners with twelve ZnZn10Tc2 cuboctahedra, edges with four equivalent TcZn12 cuboctahedra, edges with twenty ZnZn10Tc2 cuboctahedra, faces with two equivalent TcZn12 cuboctahedra, and faces with sixteen ZnZn10Tc2 cuboctahedra. Both Zn–Tc bond lengths are 2.74 Å. All Zn–Zn bond lengths are 2.74 Å. In the twenty-second Zn site, Zn is bonded to two equivalent Tc and ten Zn atoms to form ZnZn10Tc2 cuboctahedra that share corners with twelve ZnZn10Tc2 cuboctahedra, edges with four equivalent TcZn12 cuboctahedra, edges with twenty ZnZn10Tc2 cuboctahedra, faces with two equivalent TcZn12 cuboctahedra, and faces with sixteen ZnZn12 cuboctahedra. Both Zn–Tc bond lengths are 2.74 Å. All Zn–Zn bond lengths are 2.74 Å. In the twenty-third Zn site, Zn is bonded to two equivalent Tc and ten Zn atoms to form ZnZn10Tc2 cuboctahedra that share corners with twelve ZnZn10Tc2 cuboctahedra, edges with four equivalent TcZn12 cuboctahedra, edges with twenty ZnZn10Tc2 cuboctahedra, faces with two equivalent TcZn12 cuboctahedra, and faces with sixteen ZnZn10Tc2 cuboctahedra. Both Zn–Tc bond lengths are 2.74 Å. All Zn–Zn bond lengths are 2.74 Å. In the twenty-fourth Zn site, Zn is bonded to two equivalent Tc and ten Zn atoms to form ZnZn10Tc2 cuboctahedra that share corners with twelve ZnZn10Tc2 cuboctahedra, edges with four equivalent TcZn12 cuboctahedra, edges with twenty ZnZn10Tc2 cuboctahedra, faces with two equivalent TcZn12 cuboctahedra, and faces with sixteen ZnZn10Tc2 cuboctahedra. Both Zn–Zn bond lengths are 2.74 Å. In the twenty-fifth Zn site, Zn is bonded to two equivalent Tc and ten Zn atoms to form ZnZn10Tc2 cuboctahedra that share corners with twelve ZnZn10Tc2 cuboctahedra, edges with four equivalent TcZn12 cuboctahedra, edges with twenty ZnZn10Tc2 cuboctahedra, faces with two equivalent TcZn12 cuboctahedra, and faces with sixteen ZnZn10Tc2 cuboctahedra. Both Zn–Zn bond lengths are 2.74 Å.
Technetium-99 (Tc) generated from the fission of 235U and 239Pu in high yields is one of the most difficult contaminants to be addressed at the U.S. Department of Energy Hanford Site. In strongly alkaline solutions typifying Hanford tank waste, Tc exists as pertechnetate (TcO4-) (oxidation state VII) as well as in reduced forms (oxidation state < VII) collectively known as non-pertechnetate species. Designing strategies for effective Tc management, including separation and immobilization, necessitates understanding the molecular structure of the non- pertechnetate species and their identification in the actual tank waste samples, which would facilitate development of new treatment technologies effective for dissimilar Tc species. Toward this objective, a spectroscopic library of the Tc(I) [fac-Tc(CO)3]+ and Tc(IV, VII) compounds was generated using a range of techniques and applied to the characterization of the actual tank waste supernatant collected from the tank 241-AN-102 at Hanford, WA. A sample of the 241-AN-102 tank waste supernatant was processed to adjust Na concentration to about 5.6 M and remove 137Cs by spherical resorcinol-formaldehyde (sRF) ion exchange resin. Cesium-loaded sRF column was eluted with 0.5 M HNO3. As received AN-102, Cs-depleted AN-102 effluent, and sRF eluate fractions were comprehensively characterized for chemical composition and speciation of Tc using 99Tc nuclear magnetic resonance spectroscopy and X-ray absorption spectroscopy. It was demonstrated for the first time that non-pertechnetate Tc present in the 241-AN-102 tank waste is composed of several low-valent Tc species, including the Tc(I) [fac-Tc(CO)3]+ and Tc(IV) compounds. This is the second experimental observation of the [fac-Tc(CO)3]+ species in the Hanford tank waste and the first demonstration of multiple forms of non-pertechnetate species existing simultaneously in the waste, cumulatively highlighting their importance for the waste processing.
Tc6BiO18 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. there are four inequivalent Tc+5.50+ sites. In the first Tc+5.50+ site, Tc+5.50+ is bonded to six O2- atoms to form corner-sharing TcO6 octahedra. The corner-sharing octahedra tilt angles range from 35–38°. There are a spread of Tc–O bond distances ranging from 1.87–1.95 Å. In the second Tc+5.50+ site, Tc+5.50+ is bonded to six O2- atoms to form corner-sharing TcO6 octahedra. The corner-sharing octahedra tilt angles range from 35–51°. There are a spread of Tc–O bond distances ranging from 1.85–2.00 Å. In the third Tc+5.50+ site, Tc+5.50+ is bonded to six O2- atoms to form corner-sharing TcO6 octahedra. The corner-sharing octahedra tilt angles range from 30–54°. There are a spread of Tc–O bond distances ranging from 1.86–2.02 Å. In the fourth Tc+5.50+ site, Tc+5.50+ is bonded to six O2- atoms to form corner-sharing TcO6 octahedra. The corner-sharing octahedra tilt angles range from 30–54°. There are a spread of Tc–O bond distances ranging from 1.87–2.05 Å. Bi3+ is bonded in a hexagonal planar geometry to six O2- atoms. There are a spread of Bi–O bond distances ranging from 2.42–2.45 Å. There are ten inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to two Tc+5.50+ atoms. In the second O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to two Tc+5.50+ and one Bi3+ atom. In the third O2- site, O2- is bonded in a bent 150 degrees geometry to two equivalent Tc+5.50+ atoms. In the fourth O2- site, O2- is bonded in a bent 150 degrees geometry to two Tc+5.50+ atoms. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to two Tc+5.50+ and one Bi3+ atom. In the sixth O2- site, O2- is bonded in a bent 150 degrees geometry to two Tc+5.50+ atoms. In the seventh O2- site, O2- is bonded in a bent 150 degrees geometry to two equivalent Tc+5.50+ atoms. In the eighth O2- site, O2- is bonded in a 3-coordinate geometry to two Tc+5.50+ and one Bi3+ atom. In the ninth O2- site, O2- is bonded in a bent 150 degrees geometry to two Tc+5.50+ atoms. In the tenth O2- site, O2- is bonded in a bent 150 degrees geometry to two Tc+5.50+ atoms.
The speciation of Tc after the extraction of Tc(IV) from H 2 O and 1 M HNO 3 by dibutylphosphoric acid (HDBP) in dodecane has been studied by X-ray absorption fine structure (XAFS) spectroscopy. Results show the formation of dimeric species with Tc 2 O 2 and Tc 2 O units, and the formulas [Tc 2 O 2 (DBP·HDBP) 4 ] (1) and [Tc 2 O(NO 3 ) 2 (DBP) 2 (DBP·HDBP) 2 ] (2) were, respectively, proposed for the species extracted from H 2 O and 1 M HNO 3 . The interatomic Tc–Tc distances found in the Tc 2 O 2 and Tc 2 O units [2.55(3) and 3.57(4) Å, respectively] are similar to the ones found in Tc(IV) dinuclear species. It is likely that the speciation of Tc(IV) in dodecane is due to the extraction of a species with a Tc 2 O unit for (2) and to the redissolution of a Tc(IV)-DBP solid for (1). The XAFS results for (1) and (2) were compared to that obtained for the extraction of Tc(IV) with TBP/HDBP/dodecane from 0.5 M HNO 3 , (3) which highlight the formation of Tc mononuclear nitrate species {i.e. [Tc(NO 3 ) 3 (DBP)] or [Tc(NO 3 ) 2 (DBP·HDBP)]}. These results confirm the importance of the preparation and speciation of the Tc(IV) aqueous solutions prior to extraction and how much this influences and drives the final Tc speciation in organic extraction. Here, these studies outline the complexity of Tc separation chemistry and provide insights into the behavior of Tc during the reprocessing of used nuclear fuel.
Tc4OBr7 crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four Tc4OBr7 clusters. there are four inequivalent Tc+2.25+ sites. In the first Tc+2.25+ site, Tc+2.25+ is bonded in a 3-coordinate geometry to three Br1- atoms. There are a spread of Tc–Br bond distances ranging from 2.55–2.80 Å. In the second Tc+2.25+ site, Tc+2.25+ is bonded in a distorted T-shaped geometry to three Br1- atoms. There are a spread of Tc–Br bond distances ranging from 2.53–2.58 Å. In the third Tc+2.25+ site, Tc+2.25+ is bonded in a distorted T-shaped geometry to three Br1- atoms. There are one shorter (2.51 Å) and two longer (2.53 Å) Tc–Br bond lengths. In the fourth Tc+2.25+ site, Tc+2.25+ is bonded in a 4-coordinate geometry to three Br1- atoms. There are a spread of Tc–Br bond distances ranging from 2.53–2.90 Å. O2- is bonded in a distorted single-bond geometry to one Br1- atom. The O–Br bond length is 1.74 Å. There are seven inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a 1-coordinate geometry to two Tc+2.25+ atoms. In the second Br1- site, Br1- is bonded in a water-like geometry to one Tc+2.25+ and one O2- atom. In the third Br1- site, Br1- is bonded in a distorted single-bond geometry to one Tc+2.25+ atom. In the fourth Br1- site, Br1- is bonded in a 2-coordinate geometry to two Tc+2.25+ atoms. In the fifth Br1- site, Br1- is bonded in a 2-coordinate geometry to two Tc+2.25+ atoms. In the sixth Br1- site, Br1- is bonded in a 2-coordinate geometry to two Tc+2.25+ atoms. In the seventh Br1- site, Br1- is bonded in a 2-coordinate geometry to two Tc+2.25+ atoms.
Abstract El Niño‐Southern Oscillation (ENSO) is a skillful predictor for seasonal tropical cyclone (TC) activity in most TC basins. This study examines recent changes in the observed ENSO‐TC teleconnection strength, as measured by ENSO modulation of hurricane frequency. We find that the ENSO‐North Atlantic TC teleconnection fluctuated over time, with the strongest relationship occurring from the 1980s to the mid‐2000s. In the western and eastern North Pacific, the ENSO‐TC teleconnection has strengthened in recent decades. Periods with a strong ENSO‐TC teleconnection are associated with more favorable environmental conditions for TCs, with higher values of genesis potential indices. Positive phases of the Atlantic Multidecadal Oscillation coincided with periods of strong ENSO‐TC teleconnections in the Atlantic and North Pacific basins. A weaker Atlantic ENSO‐TC relationship was associated with negative phases of the Pacific Decadal Oscillation and the North Atlantic Oscillation. This research reveals climate conditions that modulate ENSO's utility for seasonal TC prediction. Plain Language Summary El Niño‐Southern Oscillation (ENSO) is a useful predictor for seasonal tropical cyclone (TC) activity in many basins. Here we found that the strength of the ENSO‐TC teleconnection, represented as the correlation between ENSO and the number of hurricanes and accumulated cyclone energy, has changed in the historical record. The ENSO‐TC teleconnection in the North Atlantic fluctuated over time, with a weak relationship during the 1960s and 1970s and a strong relationship during the 1980s to mid‐2000s. Meanwhile, the ENSO‐TC teleconnection strengthened in the North Pacific in recent decades, with strong teleconnections after the 1980s in the western North Pacific and after the 2000s in the eastern North Pacific. Periods of strong ENSO‐TC teleconnections are associated with more favorable environmental conditions for TCs, including higher values of genesis potential indices and higher mid‐tropospheric humidity, as well as positive phases of the Atlantic Multidecadal Oscillation. Additionally, the negative phase of the Pacific Decadal Oscillation leads to strong/weak ENSO‐TC teleconnections in the eastern North Pacific and North Atlantic, respectively. Furthermore, a negative North Atlantic Oscillation is associated with a weak ENSO‐North Atlantic TC teleconnection. This research highlights variations in ENSO's effectiveness for seasonal TC prediction. Key Points The observed impact of ENSO on tropical cyclone (TC) activity exhibits multidecadal fluctuations The ENSO‐TC teleconnection was strong in the Atlantic from the 1980s to mid‐2000s and strengthened over the North Pacific in recent decades The ENSO‐TC teleconnection is stronger in the Atlantic and North Pacific basins during a positive Atlantic Multidecadal Oscillation
Abstract The impact of radiative interactions on tropical cyclone (TC) climatology is investigated using a global, TC-permitting general circulation model (GCM) with realistic boundary conditions. In this model, synoptic-scale radiative interactions are suppressed by overwriting the model-generated atmospheric radiative cooling rates with their monthly varying climatological values. When radiative interactions are suppressed, the global TC frequency is significantly reduced, indicating that radiative interactions are a critical component of TC development even in the presence of spatially varying boundary conditions. The reduced TC activity is primarily due to a decrease in the frequency of pre-TC synoptic disturbances (“seeds”), whereas the likelihood that the seeds undergo cyclogenesis is less affected. When radiative interactions are suppressed, TC genesis shifts toward coastal regions, whereas TC lysis locations stay almost unchanged; together the distance between genesis and lysis is shortened, reducing TC duration. In a warmer climate, the magnitude of TC reduction from suppressing radiative interactions is diminished due to the larger contribution from latent heat release with increased sea surface temperatures. These results highlight the importance of radiative interactions in modulating the frequency and duration of TCs.
Tc2As3 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are four inequivalent Tc+0.50+ sites. In the first Tc+0.50+ site, Tc+0.50+ is bonded to six As+0.33- atoms to form a mixture of distorted edge, face, and corner-sharing TcAs6 octahedra. The corner-sharing octahedra tilt angles range from 40–60°. There are a spread of Tc–As bond distances ranging from 2.47–2.71 Å. In the second Tc+0.50+ site, Tc+0.50+ is bonded to six As+0.33- atoms to form a mixture of distorted edge, face, and corner-sharing TcAs6 octahedra. The corner-sharing octahedra tilt angles range from 40–59°. There are a spread of Tc–As bond distances ranging from 2.48–2.60 Å. In the third Tc+0.50+ site, Tc+0.50+ is bonded to six As+0.33- atoms to form a mixture of edge, face, and corner-sharing TcAs6 octahedra. The corner-sharing octahedra tilt angles range from 40–60°. There are a spread of Tc–As bond distances ranging from 2.46–2.58 Å. In the fourth Tc+0.50+ site, Tc+0.50+ is bonded to six As+0.33- atoms to form a mixture of edge, face, and corner-sharing TcAs6 octahedra. The corner-sharing octahedra tilt angles range from 40–59°. There are a spread of Tc–As bond distances ranging from 2.45–2.58 Å. There are six inequivalent As+0.33- sites. In the first As+0.33- site, As+0.33- is bonded in a 5-coordinate geometry to four Tc+0.50+ and one As+0.33- atom. The As–As bond length is 2.49 Å. In the second As+0.33- site, As+0.33- is bonded in a 5-coordinate geometry to four Tc+0.50+ and one As+0.33- atom. In the third As+0.33- site, As+0.33- is bonded in a distorted rectangular see-saw-like geometry to four Tc+0.50+ atoms. In the fourth As+0.33- site, As+0.33- is bonded in a 4-coordinate geometry to four Tc+0.50+ atoms. In the fifth As+0.33- site, As+0.33- is bonded in a 5-coordinate geometry to four Tc+0.50+ and one As+0.33- atom. The As–As bond length is 2.82 Å. In the sixth As+0.33- site, As+0.33- is bonded in a 5-coordinate geometry to four Tc+0.50+ and one As+0.33- atom. The As–As bond length is 2.70 Å.
Tc2P3 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are four inequivalent Tc+0.50+ sites. In the first Tc+0.50+ site, Tc+0.50+ is bonded to six P+0.33- atoms to form a mixture of distorted face, edge, and corner-sharing TcP6 octahedra. The corner-sharing octahedra tilt angles range from 46–60°. There are a spread of Tc–P bond distances ranging from 2.33–2.75 Å. In the second Tc+0.50+ site, Tc+0.50+ is bonded to six P+0.33- atoms to form a mixture of distorted face, edge, and corner-sharing TcP6 octahedra. The corner-sharing octahedra tilt angles range from 43–57°. There are a spread of Tc–P bond distances ranging from 2.30–2.71 Å. In the third Tc+0.50+ site, Tc+0.50+ is bonded to six P+0.33- atoms to form a mixture of face, edge, and corner-sharing TcP6 octahedra. The corner-sharing octahedra tilt angles range from 43–60°. There are a spread of Tc–P bond distances ranging from 2.35–2.45 Å. In the fourth Tc+0.50+ site, Tc+0.50+ is bonded to six P+0.33- atoms to form a mixture of face, edge, and corner-sharing TcP6 octahedra. The corner-sharing octahedra tilt angles range from 46–58°. There are a spread of Tc–P bond distances ranging from 2.35–2.47 Å. There are six inequivalent P+0.33- sites. In the first P+0.33- site, P+0.33- is bonded in a 5-coordinate geometry to four Tc+0.50+ and one P+0.33- atom. The P–P bond length is 2.24 Å. In the second P+0.33- site, P+0.33- is bonded in a 5-coordinate geometry to four Tc+0.50+ and one P+0.33- atom. In the third P+0.33- site, P+0.33- is bonded in a distorted rectangular see-saw-like geometry to four Tc+0.50+ atoms. In the fourth P+0.33- site, P+0.33- is bonded in a 4-coordinate geometry to four Tc+0.50+ atoms. In the fifth P+0.33- site, P+0.33- is bonded in a 5-coordinate geometry to four Tc+0.50+ and one P+0.33- atom. The P–P bond length is 2.42 Å. In the sixth P+0.33- site, P+0.33- is bonded in a 5-coordinate geometry to four Tc+0.50+ and one P+0.33- atom. The P–P bond length is 2.39 Å.
Rb4Tc6S13 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. there are two inequivalent Rb1+ sites. In the first Rb1+ site, Rb1+ is bonded in a 8-coordinate geometry to eight S2- atoms. There are a spread of Rb–S bond distances ranging from 3.23–3.86 Å. In the second Rb1+ site, Rb1+ is bonded in a 6-coordinate geometry to eight S2- atoms. There are a spread of Rb–S bond distances ranging from 3.25–4.05 Å. There are three inequivalent Tc+3.67+ sites. In the first Tc+3.67+ site, Tc+3.67+ is bonded to five S2- atoms to form edge-sharing TcS5 square pyramids. There are a spread of Tc–S bond distances ranging from 2.39–2.52 Å. In the second Tc+3.67+ site, Tc+3.67+ is bonded to five S2- atoms to form a mixture of corner and edge-sharing TcS5 square pyramids. There are a spread of Tc–S bond distances ranging from 2.40–2.50 Å. In the third Tc+3.67+ site, Tc+3.67+ is bonded to five S2- atoms to form TcS5 square pyramids that share a cornercorner with one SRb2TcS tetrahedra and edges with four TcS5 square pyramids. There are a spread of Tc–S bond distances ranging from 2.39–2.46 Å. There are seven inequivalent S2- sites. In the first S2- site, S2- is bonded in a 2-coordinate geometry to four Rb1+ and two equivalent Tc+3.67+ atoms. In the second S2- site, S2- is bonded to two Rb1+, one Tc+3.67+, and one S2- atom to form distorted SRb2TcS tetrahedra that share a cornercorner with one TcS5 square pyramid. The S–S bond length is 2.10 Å. In the third S2- site, S2- is bonded in a 5-coordinate geometry to three Rb1+, one Tc+3.67+, and one S2- atom. The S–S bond length is 2.12 Å. In the fourth S2- site, S2- is bonded in a 4-coordinate geometry to one Rb1+ and three Tc+3.67+ atoms. In the fifth S2- site, S2- is bonded in a 5-coordinate geometry to three Rb1+ and three Tc+3.67+ atoms. In the sixth S2- site, S2- is bonded in a 5-coordinate geometry to two Rb1+ and three Tc+3.67+ atoms. In the seventh S2- site, S2- is bonded in a 5-coordinate geometry to three Rb1+ and three Tc+3.67+ atoms.
Cs4Tc6S13 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. there are two inequivalent Cs1+ sites. In the first Cs1+ site, Cs1+ is bonded in a 12-coordinate geometry to one Cs1+ and eleven S2- atoms. The Cs–Cs bond length is 3.99 Å. There are a spread of Cs–S bond distances ranging from 3.41–4.25 Å. In the second Cs1+ site, Cs1+ is bonded in a 6-coordinate geometry to one Cs1+ and six S2- atoms. There are a spread of Cs–S bond distances ranging from 3.37–3.69 Å. There are three inequivalent Tc+3.67+ sites. In the first Tc+3.67+ site, Tc+3.67+ is bonded to five S2- atoms to form edge-sharing TcS5 square pyramids. There are a spread of Tc–S bond distances ranging from 2.40–2.58 Å. In the second Tc+3.67+ site, Tc+3.67+ is bonded to five S2- atoms to form a mixture of edge and corner-sharing TcS5 square pyramids. There are a spread of Tc–S bond distances ranging from 2.38–2.48 Å. In the third Tc+3.67+ site, Tc+3.67+ is bonded to five S2- atoms to form edge-sharing TcS5 square pyramids. There are a spread of Tc–S bond distances ranging from 2.40–2.46 Å. There are seven inequivalent S2- sites. In the first S2- site, S2- is bonded in a 4-coordinate geometry to three Cs1+ and three Tc+3.67+ atoms. In the second S2- site, S2- is bonded in a 4-coordinate geometry to one Cs1+ and three Tc+3.67+ atoms. In the third S2- site, S2- is bonded in a 2-coordinate geometry to four Cs1+ and two equivalent Tc+3.67+ atoms. In the fourth S2- site, S2- is bonded in a 6-coordinate geometry to three Cs1+ and three Tc+3.67+ atoms. In the fifth S2- site, S2- is bonded in a 5-coordinate geometry to two equivalent Cs1+ and three Tc+3.67+ atoms. In the sixth S2- site, S2- is bonded in a 1-coordinate geometry to three Cs1+ and one Tc+3.67+ atom. In the seventh S2- site, S2- is bonded in a 1-coordinate geometry to three Cs1+, one Tc+3.67+, and one S2- atom. The S–S bond length is 2.13 Å.
(K4Tc2C8H5O21)2H2 crystallizes in the triclinic P-1 space group. The structure is three-dimensional and consists of one hydrogen molecule and one K4Tc2C8H5O21 framework. In the K4Tc2C8H5O21 framework, there are four inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of K–O bond distances ranging from 2.79–2.98 Å. In the second K1+ site, K1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of K–O bond distances ranging from 2.60–2.86 Å. In the third K1+ site, K1+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of K–O bond distances ranging from 2.76–3.07 Å. In the fourth K1+ site, K1+ is bonded in a 8-coordinate geometry to one H1+ and seven O2- atoms. The K–H bond length is 2.82 Å. There are a spread of K–O bond distances ranging from 2.78–3.16 Å. There are two inequivalent Tc sites. In the first Tc site, Tc is bonded to six O2- atoms to form distorted edge-sharing TcO6 octahedra. There are a spread of Tc–O bond distances ranging from 1.90–2.10 Å. In the second Tc site, Tc is bonded to six O2- atoms to form distorted edge-sharing TcO6 octahedra. There are a spread of Tc–O bond distances ranging from 1.74–2.14 Å. There are eight inequivalent C4+ sites. In the first C4+ site, C4+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.24 Å) and one longer (1.31 Å) C–O bond length. In the second C4+ site, C4+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.24 Å) and one longer (1.30 Å) C–O bond length. In the third C4+ site, C4+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.23 Å) and one longer (1.33 Å) C–O bond length. In the fourth C4+ site, C4+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.23 Å) and one longer (1.32 Å) C–O bond length. In the fifth C4+ site, C4+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.25 Å) and one longer (1.31 Å) C–O bond length. In the sixth C4+ site, C4+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.26 Å) and one longer (1.27 Å) C–O bond length. In the seventh C4+ site, C4+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.25 Å) and one longer (1.29 Å) C–O bond length. In the eighth C4+ site, C4+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.23 Å) and one longer (1.31 Å) C–O bond length. There are five inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.97 Å. In the third H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the fifth H1+ site, H1+ is bonded in a single-bond geometry to one K1+ and one O2- atom. The H–O bond length is 0.98 Å. There are twenty-one inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to one K1+, one Tc, and one C4+ atom. In the second O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one K1+, one Tc, and one C4+ atom. In the third O2- site, O2- is bonded in a 1-coordinate geometry to one K1+, one Tc, and one C4+ atom. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to one K1+, one Tc, and one C4+ atom. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to one K1+, one Tc, and one C4+ atom. In the sixth O2- site, O2- is bonded in a single-bond geometry to one K1+ and one Tc atom. In the seventh O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Tc and one C4+ atom. In the eighth O2- site, O2- is bonded in a bent 120 degrees geometry to one Tc and one C4+ atom. In the ninth O2- site, O2- is bonded in a 2-coordinate geometry to one K1+ and two Tc atoms. In the tenth O2- site, O2- is bonded in a distorted single-bond geometry to two Tc and one H1+ atom. In the eleventh O2- site, O2- is bonded in a distorted single-bond geometry to two K1+ and one C4+ atom. In the twelfth O2- site, O2- is bonded in a 1-coordinate geometry to two K1+ and one C4+ atom. In the thirteenth O2- site, O2- is bonded in a single-bond geometry to one K1+ and one C4+ atom. In the fourteenth O2- site, O2- is bonded in a distorted single-bond geometry to one K1+ and one C4+ atom. In the fifteenth O2- site, O2- is bonded in a distorted single-bond geometry to two K1+ and one C4+ atom. In the sixteenth O2- site, O2- is bonded in a distorted single-bond geometry to two K1+ and one C4+ atom. In the seventeenth O2- site, O2- is bonded in a single-bond geometry to one K1+ and one C4+ atom. In the eighteenth O2- site, O2- is bonded in a distorted single-bond geometry to one K1+ and one C4+ atom. In the nineteenth O2- site, O2- is bonded in a water-like geometry to two K1+ and two H1+ atoms. In the twentieth O2- site, O2- is bonded in a distorted single-bond geometry to two K1+ and one C4+ atom. In the twenty-first O2- site, O2- is bonded in a water-like geometry to two K1+ and two H1+ atoms.
K2(TcS2)3 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. there are three inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 6-coordinate geometry to six S2- atoms. There are a spread of K–S bond distances ranging from 3.14–3.54 Å. In the second K1+ site, K1+ is bonded in a 8-coordinate geometry to eight S2- atoms. There are a spread of K–S bond distances ranging from 3.17–3.48 Å. In the third K1+ site, K1+ is bonded in a 7-coordinate geometry to seven S2- atoms. There are a spread of K–S bond distances ranging from 3.10–3.62 Å. There are three inequivalent Tc+3.33+ sites. In the first Tc+3.33+ site, Tc+3.33+ is bonded to five S2- atoms to form edge-sharing TcS5 square pyramids. There are a spread of Tc–S bond distances ranging from 2.39–2.50 Å. In the second Tc+3.33+ site, Tc+3.33+ is bonded to five S2- atoms to form a mixture of edge and corner-sharing TcS5 square pyramids. There are a spread of Tc–S bond distances ranging from 2.38–2.51 Å. In the third Tc+3.33+ site, Tc+3.33+ is bonded to five S2- atoms to form a mixture of edge and corner-sharing TcS5 square pyramids. There are a spread of Tc–S bond distances ranging from 2.38–2.51 Å. There are six inequivalent S2- sites. In the first S2- site, S2- is bonded in a 4-coordinate geometry to one K1+ and three Tc+3.33+ atoms. In the second S2- site, S2- is bonded in a 5-coordinate geometry to two equivalent K1+ and three Tc+3.33+ atoms. In the third S2- site, S2- is bonded in a 5-coordinate geometry to two K1+ and three Tc+3.33+ atoms. In the fourth S2- site, S2- is bonded in a 6-coordinate geometry to three K1+ and three Tc+3.33+ atoms. In the fifth S2- site, S2- is bonded in a 5-coordinate geometry to three K1+, one Tc+3.33+, and one S2- atom. The S–S bond length is 2.12 Å. In the sixth S2- site, S2- is bonded in a 5-coordinate geometry to three K1+ and two Tc+3.33+ atoms.
K2(TcSe2)3 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. there are three inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 6-coordinate geometry to six Se2- atoms. There are a spread of K–Se bond distances ranging from 3.30–3.67 Å. In the second K1+ site, K1+ is bonded in a 8-coordinate geometry to eight Se2- atoms. There are a spread of K–Se bond distances ranging from 3.32–3.61 Å. In the third K1+ site, K1+ is bonded in a 7-coordinate geometry to eight Se2- atoms. There are a spread of K–Se bond distances ranging from 3.24–3.89 Å. There are three inequivalent Tc+3.33+ sites. In the first Tc+3.33+ site, Tc+3.33+ is bonded to five Se2- atoms to form edge-sharing TcSe5 square pyramids. There are a spread of Tc–Se bond distances ranging from 2.51–2.63 Å. In the second Tc+3.33+ site, Tc+3.33+ is bonded to five Se2- atoms to form a mixture of corner and edge-sharing TcSe5 square pyramids. There are a spread of Tc–Se bond distances ranging from 2.50–2.68 Å. In the third Tc+3.33+ site, Tc+3.33+ is bonded to five Se2- atoms to form a mixture of corner and edge-sharing TcSe5 square pyramids. There are a spread of Tc–Se bond distances ranging from 2.50–2.68 Å. There are six inequivalent Se2- sites. In the first Se2- site, Se2- is bonded in a 4-coordinate geometry to two K1+ and three Tc+3.33+ atoms. In the second Se2- site, Se2- is bonded in a 5-coordinate geometry to two equivalent K1+ and three Tc+3.33+ atoms. In the third Se2- site, Se2- is bonded in a 5-coordinate geometry to two K1+ and three Tc+3.33+ atoms. In the fourth Se2- site, Se2- is bonded in a 6-coordinate geometry to three K1+ and three Tc+3.33+ atoms. In the fifth Se2- site, Se2- is bonded in a 5-coordinate geometry to three K1+, one Tc+3.33+, and one Se2- atom. The Se–Se bond length is 2.45 Å. In the sixth Se2- site, Se2- is bonded in a 5-coordinate geometry to three K1+ and two Tc+3.33+ atoms.