DOE OSTI2020
CaBe2MnSi5O17 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are four inequivalent Ca sites. In the first Ca site, Ca is bonded in a 8-coordinate geometry to eight O atoms. There are a spread of Ca–O bond distances ranging from 2.35–2.98 Å. In the second Ca site, Ca is bonded in a 8-coordinate geometry to eight O atoms. There are a spread of Ca–O bond distances ranging from 2.35–2.97 Å. In the third Ca site, Ca is bonded in a 8-coordinate geometry to eight O atoms. There are a spread of Ca–O bond distances ranging from 2.35–2.96 Å. In the fourth Ca site, Ca is bonded in a 8-coordinate geometry to eight O atoms. There are a spread of Ca–O bond distances ranging from 2.36–2.97 Å. There are six inequivalent Be sites. In the first Be site, Be is bonded to four O atoms to form BeO4 tetrahedra that share a cornercorner with one MnO6 octahedra, corners with three SiO4 tetrahedra, and an edgeedge with one MnO6 octahedra. The corner-sharing octahedral tilt angles are 50°. There are a spread of Be–O bond distances ranging from 1.59–1.72 Å. In the second Be site, Be is bonded to four O atoms to form BeO4 tetrahedra that share a cornercorner with one MnO6 octahedra, corners with three SiO4 tetrahedra, and an edgeedge with one MnO6 octahedra. The corner-sharing octahedral tilt angles are 50°. There are a spread of Be–O bond distances ranging from 1.59–1.72 Å. In the third Be site, Be is bonded to four O atoms to form BeO4 tetrahedra that share a cornercorner with one MnO6 octahedra, corners with three SiO4 tetrahedra, and an edgeedge with one MnO6 octahedra. The corner-sharing octahedral tilt angles are 49°. There are a spread of Be–O bond distances ranging from 1.58–1.76 Å. In the fourth Be site, Be is bonded to four O atoms to form BeO4 tetrahedra that share a cornercorner with one MnO6 octahedra, corners with three SiO4 tetrahedra, and an edgeedge with one MnO6 octahedra. The corner-sharing octahedral tilt angles are 49°. There are a spread of Be–O bond distances ranging from 1.58–1.76 Å. In the fifth Be site, Be is bonded to four O atoms to form BeO4 tetrahedra that share a cornercorner with one MnO6 octahedra, corners with three SiO4 tetrahedra, and an edgeedge with one MnO6 octahedra. The corner-sharing octahedral tilt angles are 49°. There are a spread of Be–O bond distances ranging from 1.58–1.76 Å. In the sixth Be site, Be is bonded to four O atoms to form BeO4 tetrahedra that share a cornercorner with one MnO6 octahedra, corners with three SiO4 tetrahedra, and an edgeedge with one MnO6 octahedra. The corner-sharing octahedral tilt angles are 49°. There are a spread of Be–O bond distances ranging from 1.58–1.76 Å. There are four inequivalent Mn sites. In the first Mn site, Mn is bonded to six O atoms to form MnO6 octahedra that share corners with two equivalent BeO4 tetrahedra, corners with four SiO4 tetrahedra, and edges with two equivalent BeO4 tetrahedra. There are a spread of Mn–O bond distances ranging from 1.89–2.17 Å. In the second Mn site, Mn is bonded to six O atoms to form MnO6 octahedra that share corners with two equivalent BeO4 tetrahedra, corners with four SiO4 tetrahedra, and edges with two equivalent BeO4 tetrahedra. There are a spread of Mn–O bond distances ranging from 1.89–2.16 Å. In the third Mn site, Mn is bonded to six O atoms to form MnO6 octahedra that share corners with two BeO4 tetrahedra, corners with four SiO4 tetrahedra, and edges with two BeO4 tetrahedra. There are a spread of Mn–O bond distances ranging from 1.91–2.06 Å. In the fourth Mn site, Mn is bonded to six O atoms to form MnO6 octahedra that share corners with two BeO4 tetrahedra, corners with four SiO4 tetrahedra, and edges with two BeO4 tetrahedra. There are a spread of Mn–O bond distances ranging from 1.91–2.05 Å. There are fifteen inequivalent Si sites. In the first Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with four MnO6 octahedra and corners with four BeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 59–64°. There are a spread of Si–O bond distances ranging from 1.62–1.67 Å. In the second Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with four MnO6 octahedra and corners with four BeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 59–63°. There are a spread of Si–O bond distances ranging from 1.62–1.67 Å. In the third Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with four MnO6 octahedra and corners with four BeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 59–64°. There are a spread of Si–O bond distances ranging from 1.62–1.67 Å. In the fourth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with four MnO6 octahedra and corners with four BeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 59–63°. There are a spread of Si–O bond distances ranging from 1.62–1.67 Å. In the fifth Si site, Si is bonded to four O atoms to form corner-sharing SiO4 tetrahedra. There is three shorter (1.62 Å) and one longer (1.63 Å) Si–O bond length. In the sixth Si site, Si is bonded to four O atoms to form corner-sharing SiO4 tetrahedra. There is three shorter (1.62 Å) and one longer (1.63 Å) Si–O bond length. In the seventh Si site, Si is bonded to four O atoms to form corner-sharing SiO4 tetrahedra. There is three shorter (1.62 Å) and one longer (1.63 Å) Si–O bond length. In the eighth Si site, Si is bonded to four O atoms to form corner-sharing SiO4 tetrahedra. There is three shorter (1.62 Å) and one longer (1.63 Å) Si–O bond length. In the ninth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one BeO4 tetrahedra and corners with three SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.63–1.65 Å. In the tenth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one BeO4 tetrahedra and corners with three SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.63–1.65 Å. In the eleventh Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one BeO4 tetrahedra and corners with three SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.63–1.65 Å. In the twelfth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one BeO4 tetrahedra and corners with three SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.63–1.65 Å. In the thirteenth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one BeO4 tetrahedra and corners with three SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.63–1.65 Å. In the fourteenth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one BeO4 tetrahedra and corners with three SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.63–1.65 Å. In the fifteenth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one BeO4 tetrahedra and corners with three SiO4 tetrahedra. There is three shorter (1.63 Å) and one longer (1.65 Å) Si–O bond length. There are sixty-eight inequivalent O sites. In the first O site, O is bonded in a distorted trigonal non-coplanar geometry to one Be, one Mn, and one Si atom. The O–Be bond length is 1.62 Å. In the second O site, O is bonded in a distorted trigonal non-coplanar geometry to one Be, one Mn, and one Si atom. The O–Be bond length is 1.62 Å. In the third O site, O is bonded in a distorted trigonal non-coplanar geometry to one Be, one Mn, and one Si atom. In the fourth O site, O is bonded in a distorted trigonal non-coplanar geometry to one Be, one Mn, and one Si atom. In the fifth O site, O is bonded in a distorted trigonal non-coplanar geometry to one Be, one Mn, and one Si atom. In the sixth O site, O is bonded in a distorted trigonal non-coplanar geometry to one Be, one Mn, and one Si atom. In the seventh O site, O is bonded in a distorted trigonal non-coplanar geometry to one Be, one Mn, and one Si atom. In the eighth O site, O is bonded in a distorted trigonal non-coplanar geometry to one Be, one Mn, and one Si atom. In the ninth O site, O is bonded in a 4-coordinate geometry to one Ca, one Be, one Mn, and one Si atom. In the tenth O site, O is bonded in a 4-coordinate geometry to one Ca, one Be, one Mn, and one Si atom. In the eleventh O site, O is bonded in a 4-coordinate geometry to one Ca, one Be, one Mn, and one Si atom. In the twelfth O site, O is bonded in a 4-coordinate geometry to one Ca, one Be, one Mn, and one Si atom. In the thirteenth O site, O is bonded in a 4-coordinate geometry to one Ca, one Be, one Mn, and one Si atom. The O–Be bond length is 1.72 Å. In the fourteenth O site, O is bonded in a 4-coordinate geometry to one Ca, one Be, one Mn, and one Si atom. The O–Be bond length is 1.72 Å. In the fifteenth O site, O is bonded in a 4-coordinate geometry to one Ca, one Be, one Mn, and one Si atom. In the sixteenth O site, O is bonded in a 4-coordinate geometry to one Ca, one Be, one Mn, and one Si atom. In the seventeenth O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the eighteenth O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the nineteenth O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the twentieth O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the twenty-first O site, O is bonded in a bent 150 degrees geometry to two Si atoms. Both O–Si bond lengths are 1.62 Å. In the twenty-second O site, O is bonded in a bent 150 degrees geometry to two Si atoms. Both O–Si bond lengths are 1.62 Å. In the twenty-third O site, O is bonded in a bent 150 degrees geometry to two Si atoms. Both O–Si bond lengths are 1.62 Å. In the twenty-fourth O site, O is bonded in a bent 150 degrees geometry to two Si atoms. Both O–Si bond lengths are 1.62 Å. In the twenty-fifth O site, O is bonded in a bent 150 degrees geometry to two Si atoms. Both O–Si bond lengths are 1.62 Å. In the twenty-sixth O site, O is bonded in a bent 150 degrees geometry to two Si atoms. Both O–Si bond lengths are 1.62 Å. In the twenty-seventh O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the twenty-eighth O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the twenty-ninth O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the thirtieth O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the thirty-first O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the thirty-second O site, O is bonded in a bent 150 degrees geometry to two Si atoms. The O–Si bond length is 1.64 Å. In the thirty-third O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the thirty-fourth O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the thirty-fifth O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the thirty-sixth O site, O is bonded in a bent 150 degrees geometry to two Si atoms. The O–Si bond length is 1.63 Å. In the thirty-seventh O site, O is bonded in a bent 150 degrees geometry to two Si atoms. The O–Si bond length is 1.63 Å. In the thirty-eighth O site, O is bonded in a bent 150 degrees geometry to two Si atoms. The O–Si bond length is 1.63 Å. In the thirty-ninth O site, O is bonded in a bent 150 degrees geometry to two Si atoms. The O–Si bond length is 1.63 Å. In the fortieth O site, O is bonded in a bent 150 degrees geometry to two Si atoms. The O–Si bond length is 1.63 Å. In the forty-first O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the forty-second O site, O is bonded in a bent 150 degrees geometry to two Si atoms. The O–Si bond length