Phosphidogermanates are chemical compounds that have phosphorus bound to germanium to yield anions. They are in the category of phosphidotetrelates and also pnictides. They are analogous to nitridogermanates, phosphidoaluminates, phosphidogallates, phosphidoindates, phosphidosilicates or phosphidostannates.
They are under investigation as infrared non-linear optic materials [1] and solid-state electrolytes. [2]
formula | MW | crystal system | space group | unit cell Å | volume | density | form | properties | references |
---|---|---|---|---|---|---|---|---|---|
GeP | monoclinic | C2/m | a = 15.1948 b = 3.6337 c = 9.1941 β = 101.239° | [3] | |||||
Li2GeP2 | 148.458 | tetragonal | I41/acd | a = 12.3069 c = 19.0306 Z=32 | 2882.42 | 2.736 | Ge4P10 supratetrahedra | red | [4] |
LiGe3P3 | 317.751 | orthorhombic | Pbam | a = 9.8459 b = 15.7489 c = 3.5995 Z=4 | 558.15 | 3.780 | GeP4 and Ge(P3Ge) tetrahedra in 5 and 6-membered rings making 2D slabs | black | [4] |
Li8GeP4 | 252 | Pa3 | a=11.80203 c=11.80203 Z=8 | 1643.88 | 2.037 | [5] [6] | |||
Li8GeP4 | 251.99 | cubic | P43n | a=11.77294 Z=8 | 1635.98 | 2.046 | [5] [6] | ||
Li14GeP6 | cubic | Fm3m | a=5.95667 Z=4 | 1.860 | brown | [2] [7] | |||
Li10.1Ge5P | Pnma | a=10.360 b=4.3072 c=24.267 Z=4 | 1082.8 | 2.86 | Ge5 rings | black; actually is a germanide phosphide | [8] | ||
NaGe3P3 | orthorhombic | Pmc21 | a=3.6276 b=8.407 c=10.332 Z=2 | 315.09 | 3.517 | Ge3P7 ring | red; band gap 2.06 eV; semiconductor | [9] | |
Na2Ge3P3 | 356.72 | monoclinic | C2/m | a = 17.639 b = 3.6176 c = 11.354 β = 92.74° Z=4 | 723.7 | 3.274 | black | [10] | |
Na3Ge2P3 | 307.06 | monoclinic | P21/c | a = 7.2894 b = 14.7725 c = 7.0528 β = 106.331° Z=4 | 728.8 | 2.798 | Ge2P6 with shared P | black | [11] |
Na5Ge7P5 | monoclinic | C2/m | a = 16.168 b = 3.6776 c = 12.924 β = 91.30° Z=2 | 768.2 | 3.343 | black | [10] | ||
Na8GeP4 | 380.4 | cubic | Fd3m | a=13.4230 Z=8 | 2418.53 | 2.08943 | same as Na8SnSb4 | black; decomposes over 350°C to Na10Ge2P6;band gap 1.9 eV | [5] |
Na10Ge2P6 | monoclinic | P21/n | a=13.176 b =7.36.4 c=8.042 β=90.26° Z=2 | 780.29 | 2.38 | beige; moisture sensitive | [12] | ||
CuGe2P3 | [13] | ||||||||
ZnGeP2 | I42d | a=5.466 c=10.722 | melt 1027°C | [1] [14] [15] [16] | |||||
Ag6Ge10P12 | 1744.76 | cubic | I43m | a=10.3111 Z=2 | 1096.3 | 5.286 | air stable; silver grey; thermoelectric | [17] [18] [19] | |
CdGeP2 | I42d | a=5.740 c=10.773 | [20] | ||||||
Cs5GeP3 | orthorhombic | Pnma | a=14.31 b=5.994 c=15.618 Z=4 | metallic | [21] | ||||
BaGe2P2 | 344.46 | tetragonal | P42mc | a =7.6153 c =8.490 Z=4 | 492.3 | 4.647 | light metallic grey; melt 861 °C | [22] |