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] |
The phosphidosilicates or phosphosilicides are inorganic compounds containing silicon bonded to phosphorus and one or more other kinds of elements. In the phosphosilicates each silicon atom is surrounded by four phosphorus atoms in a tetrahedron. The triphosphosilicates have a SiP3 unit, that can be a planar triangle like carbonate CO3. The phosphorus atoms can be shared to form different patterns e.g. [Si2P6]10− which forms pairs, and [Si3P7]3− which contains two-dimensional double layer sheets. [SiP4]8− with isolated tetrahedra, and [SiP2]2− with a three dimensional network with shared tetrahedron corners. SiP clusters can be joined, not only by sharing a P atom, but also by way of a P-P bond. This does not happen with nitridosilicates or plain silicates.
The inorganic imide is an inorganic chemical compound containing
Nitride fluorides containing nitride and fluoride ions with the formula NF4-. They can be electronically equivalent to a pair of oxide ions O24-. Nitride fluorides were discovered in 1996 by Lavalle et al. They heated diammonium technetium hexafluoride to 300 °C to yield TcNF. Another preparation is to heat a fluoride compound with a nitride compound in a solid state reaction. The fluorimido ion is F-N2- and is found in a rhenium compound.
A selenite fluoride is a chemical compound or salt that contains fluoride and selenite anions. These are mixed anion compounds. Some have third anions, including nitrate, molybdate, oxalate, selenate, silicate and tellurate.
The nitridosilicates are chemical compounds that have anions with nitrogen bound to silicon. Counter cations that balance the electric charge are mostly electropositive metals from the alkali metals, alkaline earths or rare earth elements. Silicon and nitrogen have similar electronegativities, so the bond between them is covalent. Nitrogen atoms are arranged around a silicon atom in a tetrahedral arrangement.
Selenogallates are chemical compounds which contain anionic units of selenium connected to gallium. They can be considered as gallates where selenium substitutes for oxygen. Similar compounds include the thiogallates and selenostannates. They are in the category of chalcogenotrielates or more broadly chalcogenometallates.
Sulfidostannates, or thiostannates are chemical compounds containing anions composed of tin linked with sulfur. They can be considered as stannates with sulfur substituting for oxygen. Related compounds include the thiosilicates, and thiogermanates, and by varying the chalcogen: selenostannates, and tellurostannates. Oxothiostannates have oxygen in addition to sulfur. Thiostannates can be classed as chalcogenidometalates, thiometallates, chalcogenidotetrelates, thiotetrelates, and chalcogenidostannates. Tin is almost always in the +4 oxidation state in thiostannates, although a couple of mixed sulfides in the +2 state are known,
A chloride nitride is a mixed anion compound containing both chloride (Cl−) and nitride ions (N3−). Another name is metallochloronitrides. They are a subclass of halide nitrides or pnictide halides.
A Phosphide chloride is a mixed anion compound containing both phosphide (P3−) and chloride (Cl−) ions.
Phosphide silicides or silicide phosphides or silicophosphides are compounds containing anions composed of silicide (Si4−) and phosphide (P3−). They can be considered as mixed anion compounds. They are distinct from the phosphidosilicates, which have the phosphorus bonded to the silicon. Related compounds include the phosphide carbides, germanide phosphides, nitride silicides, and antimonide silicides.
Arsenidosilicates are chemical compounds that contain anions with arsenic bonded to silicon. They are in the category of tetrelarsenides, pnictidosilicates, or tetrelpnictides. They can be classed as Zintl phases or intermetallics. They are analogous to the nitridosilicates, phosphidosilicates, arsenidogermanates, and arsenidostannates. They are distinct from arsenate silicates which have oxygen connected with arsenic and silicon, or arsenatosilicates with arsenate groups sharing oxygen with silicate.
Arsenidogermanates are chemical compounds that contain anions with arsenic bonded to germanium. They are in the category of tetrelarsenides, pnictidogermanates, or tetrelpnictides.
Arsenidostanates are chemical compounds that contain anions with arsenic bonded to tin. They are in the category of tetrelarsenides, pnictidostancates, or tetrelpnictides.
Lanthanum phosphide is an inorganic compound of lanthanum and phosphorus with the chemical formula LaP.
Selenidogermanates are compounds with anions with selenium bound to germanium. They are analogous with germanates, thiogermanates, and telluridogermanates.
Phosphide iodides or iodide phosphides are compounds containing anions composed of iodide (I−) and phosphide (P3−). They can be considered as mixed anion compounds. They are in the category of pnictidehalides. Related compounds include the phosphide chlorides, arsenide iodides antimonide iodides and phosphide bromides.
An iodide nitride is a mixed anion compound containing both iodide (I−) and nitride ions (N3−). Another name is metalloiodonitrides. They are a subclass of halide nitrides or pnictide halides. Some different kinds include ionic alkali or alkaline earth salts, small clusters where metal atoms surround a nitrogen atom, layered group 4 element 2-dimensional structures, and transition metal nitrido complexes counter-balanced with iodide ions. There is also a family with rare earth elements and nitrogen and sulfur in a cluster.
Selenidostannates are chemical compounds which contain anionic units of selenium connected to tin. They can be considered as stannates where selenium substitutes for oxygen. Similar compounds include the selenogermanates and thiostannates. They are in the category of chalcogenidotetrelates or more broadly chalcogenometallates.
Strontium selenide is an inorganic compound with the chemical formula SrSe.
A selenophosphate is a chemical compound containing phosphate anions substituted with selenium. Over 7000 compounds are known with a bond between selenium and phosphorus. Compared to phosphorus-sulfur compounds selenophosphates are less thermally stable, and more easily destroyed by water. However they are more stable than tellurophosphates which have an even weaker phosphorus-tellurium bond. Selenophosphates have an oxidation number for phosphorus of +5. But in many there are bonds between phosphorus atoms, reducing the oxidation state to +4, Some may be termed selenophosphites.