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MgHfNi2 crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two MgHfNi2 ribbons oriented in the (1, 0, 0) direction. Mg is bonded in a linear geometry to two equivalent Ni atoms. Both Mg–Ni bond lengths are 2.63 Å. Hf is bonded in a linear geometry to two equivalent Ni atoms. Both Hf–Ni bond lengths are 2.19 Å. Ni is bonded in a linear geometry to one Mg and one Hf atom.
HfMnCo2 crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two HfMnCo2 ribbons oriented in the (1, 0, 0) direction. Hf is bonded in a linear geometry to two equivalent Co atoms. Both Hf–Co bond lengths are 2.12 Å. Mn is bonded in a linear geometry to two equivalent Co atoms. Both Mn–Co bond lengths are 2.45 Å. Co is bonded in a linear geometry to one Hf and one Mn atom.
HfAu2Cu crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two HfAu2Cu ribbons oriented in the (1, 0, 0) direction. Hf is bonded in a linear geometry to two equivalent Au atoms. Both Hf–Au bond lengths are 2.58 Å. Au is bonded in a linear geometry to one Hf and one Cu atom. The Au–Cu bond length is 2.47 Å. Cu is bonded in a linear geometry to two equivalent Au atoms.
Hf2Se crystallizes in the hexagonal P6_3/mmc space group. The structure is two-dimensional and consists of two Hf2Se sheets oriented in the (0, 0, 1) direction. Hf is bonded in a 3-coordinate geometry to three equivalent Se atoms. All Hf–Se bond lengths are 2.76 Å. Se is bonded to six equivalent Hf atoms to form distorted edge-sharing SeHf6 pentagonal pyramids.
HfAu2Ag crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two HfAu2Ag ribbons oriented in the (1, 0, 0) direction. Hf is bonded in a linear geometry to two equivalent Au atoms. Both Hf–Au bond lengths are 2.59 Å. Au is bonded in a linear geometry to one Hf and one Ag atom. The Au–Ag bond length is 2.69 Å. Ag is bonded in a linear geometry to two equivalent Au atoms.
HfPd2Zn is Heusler structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Hf is bonded in a body-centered cubic geometry to eight equivalent Pd atoms. All Hf–Pd bond lengths are 2.78 Å. Pd is bonded in a body-centered cubic geometry to four equivalent Hf and four equivalent Zn atoms. All Pd–Zn bond lengths are 2.78 Å. Zn is bonded in a body-centered cubic geometry to eight equivalent Pd atoms.
YHfRh2 crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two YHfRh2 ribbons oriented in the (1, 0, 0) direction. Y is bonded in a linear geometry to two equivalent Rh atoms. Both Y–Rh bond lengths are 2.57 Å. Hf is bonded in a linear geometry to two equivalent Rh atoms. Both Hf–Rh bond lengths are 2.30 Å. Rh is bonded in a linear geometry to one Y and one Hf atom.
BeHfAu2 crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two BeHfAu2 ribbons oriented in the (1, 0, 0) direction. Be is bonded in a linear geometry to two equivalent Au atoms. Both Be–Au bond lengths are 2.25 Å. Hf is bonded in a linear geometry to two equivalent Au atoms. Both Hf–Au bond lengths are 2.73 Å. Au is bonded in a linear geometry to one Be and one Hf atom.
HfRh2Ge crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two HfRh2Ge ribbons oriented in the (1, 0, 0) direction. Hf is bonded in a linear geometry to two equivalent Rh atoms. Both Hf–Rh bond lengths are 2.21 Å. Rh is bonded in a linear geometry to one Hf and one Ge atom. The Rh–Ge bond length is 2.35 Å. Ge is bonded in a linear geometry to two equivalent Rh atoms.
Hf3I is Uranium Silicide-like structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Hf is bonded in a distorted see-saw-like geometry to four equivalent I atoms. There are two shorter (3.13 Å) and two longer (3.25 Å) Hf–I bond lengths. I is bonded to twelve equivalent Hf atoms to form a mixture of face and corner-sharing IHf12 cuboctahedra.
Hf3Mn4Si6 crystallizes in the tetragonal P4_2/mbc space group. The structure is three-dimensional. there are three inequivalent Hf4+ sites. In the first Hf4+ site, Hf4+ is bonded to seven Si4- atoms to form HfSi7 pentagonal bipyramids that share corners with two equivalent MnSi6 octahedra, corners with eight HfSi7 pentagonal bipyramids, edges with three HfSi7 pentagonal bipyramids, faces with two equivalent MnSi6 octahedra, and faces with three HfSi7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 51°. There are a spread of Hf–Si bond distances ranging from 2.60–2.84 Å. In the second Hf4+ site, Hf4+ is bonded to seven Si4- atoms to form HfSi7 pentagonal bipyramids that share corners with two equivalent MnSi6 octahedra, corners with six HfSi7 pentagonal bipyramids, edges with two equivalent HfSi7 pentagonal bipyramids, faces with two equivalent MnSi6 octahedra, and faces with six HfSi7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 51°. There are a spread of Hf–Si bond distances ranging from 2.72–2.84 Å. In the third Hf4+ site, Hf4+ is bonded to seven Si4- atoms to form HfSi7 pentagonal bipyramids that share corners with four equivalent MnSi6 octahedra, corners with six HfSi7 pentagonal bipyramids, an edgeedge with one HfSi7 pentagonal bipyramid, and faces with five HfSi7 pentagonal bipyramids. The corner-sharing octahedra tilt angles range from 38–40°. There are a spread of Hf–Si bond distances ranging from 2.68–2.82 Å. There are three inequivalent Mn3+ sites. In the first Mn3+ site, Mn3+ is bonded in a 6-coordinate geometry to six Si4- atoms. There are a spread of Mn–Si bond distances ranging from 2.40–2.46 Å. In the second Mn3+ site, Mn3+ is bonded in a 7-coordinate geometry to seven Si4- atoms. There are a spread of Mn–Si bond distances ranging from 2.35–2.85 Å. In the third Mn3+ site, Mn3+ is bonded to six Si4- atoms to form distorted MnSi6 octahedra that share corners with eight HfSi7 pentagonal bipyramids, faces with two equivalent MnSi6 octahedra, and faces with four HfSi7 pentagonal bipyramids. There are a spread of Mn–Si bond distances ranging from 2.39–2.48 Å. There are six inequivalent Si4- sites. In the first Si4- site, Si4- is bonded in a 6-coordinate geometry to one Hf4+, four equivalent Mn3+, and one Si4- atom. The Si–Si bond length is 2.35 Å. In the second Si4- site, Si4- is bonded in a 9-coordinate geometry to five Hf4+ and four Mn3+ atoms. In the third Si4- site, Si4- is bonded in a 12-coordinate geometry to four Hf4+ and four equivalent Mn3+ atoms. In the fourth Si4- site, Si4- is bonded in a 9-coordinate geometry to four Hf4+ and five Mn3+ atoms. In the fifth Si4- site, Si4- is bonded in a 5-coordinate geometry to one Hf4+ and six Mn3+ atoms. In the sixth Si4- site, Si4- is bonded in a 10-coordinate geometry to six Hf4+, two equivalent Mn3+, and two equivalent Si4- atoms. Both Si–Si bond lengths are 2.52 Å.
Pd2HfIn is alpha iridium vanadium-derived structured and crystallizes in the tetragonal P4/mmm space group. The structure is three-dimensional. Hf is bonded in a distorted body-centered cubic geometry to eight equivalent Pd atoms. All Hf–Pd bond lengths are 2.81 Å. Pd is bonded in a distorted body-centered cubic geometry to four equivalent Hf and four equivalent In atoms. All Pd–In bond lengths are 2.98 Å. In is bonded in a 8-coordinate geometry to eight equivalent Pd atoms.
Rb3Hf is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Rb is bonded to eight equivalent Rb and four equivalent Hf atoms to form distorted RbRb8Hf4 cuboctahedra that share corners with four equivalent HfRb12 cuboctahedra, corners with fourteen equivalent RbRb8Hf4 cuboctahedra, edges with six equivalent HfRb12 cuboctahedra, edges with twelve equivalent RbRb8Hf4 cuboctahedra, faces with four equivalent HfRb12 cuboctahedra, and faces with sixteen equivalent RbRb8Hf4 cuboctahedra. There are a spread of Rb–Rb bond distances ranging from 4.14–4.65 Å. There are two shorter (4.24 Å) and two longer (4.40 Å) Rb–Hf bond lengths. Hf is bonded to twelve equivalent Rb atoms to form HfRb12 cuboctahedra that share corners with six equivalent HfRb12 cuboctahedra, corners with twelve equivalent RbRb8Hf4 cuboctahedra, edges with eighteen equivalent RbRb8Hf4 cuboctahedra, faces with eight equivalent HfRb12 cuboctahedra, and faces with twelve equivalent RbRb8Hf4 cuboctahedra.
ThHfTc2 is Heusler structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Th is bonded in a body-centered cubic geometry to eight equivalent Tc atoms. All Th–Tc bond lengths are 2.95 Å. Hf is bonded in a body-centered cubic geometry to eight equivalent Tc atoms. All Hf–Tc bond lengths are 2.95 Å. Tc is bonded in a body-centered cubic geometry to four equivalent Th and four equivalent Hf atoms.
HfTaRu2 is Heusler structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Hf is bonded in a body-centered cubic geometry to eight equivalent Ru atoms. All Hf–Ru bond lengths are 2.78 Å. Ta is bonded in a body-centered cubic geometry to eight equivalent Ru atoms. All Ta–Ru bond lengths are 2.78 Å. Ru is bonded in a body-centered cubic geometry to four equivalent Hf and four equivalent Ta atoms.
Hf6Rh7Ga16 crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Hf is bonded in a 4-coordinate geometry to four equivalent Ga atoms. All Hf–Ga bond lengths are 2.77 Å. There are two inequivalent Rh sites. In the first Rh site, Rh is bonded to eight Ga atoms to form distorted edge-sharing RhGa8 cuboctahedra. There are four shorter (2.53 Å) and four longer (2.70 Å) Rh–Ga bond lengths. In the second Rh site, Rh is bonded in a body-centered cubic geometry to eight equivalent Ga atoms. All Rh–Ga bond lengths are 2.61 Å. There are two inequivalent Ga sites. In the first Ga site, Ga is bonded in a 6-coordinate geometry to three equivalent Hf and three equivalent Rh atoms. In the second Ga site, Ga is bonded in a 4-coordinate geometry to four Rh atoms.
HfTiCo2 crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two HfTiCo2 ribbons oriented in the (1, 0, 0) direction. Hf is bonded in a linear geometry to two equivalent Co atoms. Both Hf–Co bond lengths are 2.24 Å. Ti is bonded in a linear geometry to two equivalent Co atoms. Both Ti–Co bond lengths are 2.20 Å. Co is bonded in a linear geometry to one Hf and one Ti atom.
HfMnP crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Hf is bonded in a 5-coordinate geometry to five equivalent P atoms. There are a spread of Hf–P bond distances ranging from 2.64–2.71 Å. Mn is bonded to four equivalent P atoms to form a mixture of distorted corner and edge-sharing MnP4 tetrahedra. There are a spread of Mn–P bond distances ranging from 2.37–2.47 Å. P is bonded in a 9-coordinate geometry to five equivalent Hf and four equivalent Mn atoms.