Английская Википедия:Arsenidosilicate

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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.

Arsenidosilicates have dark coloured crystals, usually metallic black. They are often decomposed by water, and some are unstable with respect to the water in air.

These compounds have been investigated as ionic conductors, semiconductors and photovoltaics.

List

name	formula	formula weight	crystal system	space group	unit cell	volume	density	comments	ref
	Li2SiAs2		tetragonal	I41/acd	a=12.563 c=19.390			red; air sensitive; Si4As10 units
	LiSi3As6		orthorhombic	Cmca	a=14.244 b=11.247 c=10.757			water and acid stable
	Li5SiAs3			C2/c				black, hydrolysed by water
	Li3Si7As8		monoclinic	P2/m	a=8.9904 b=3.7154 c=11.6023 β=96.307 Z=1	385.21	3.52	layered; moisture sensitive
	NaSi3As3				a=10.002 b=18.54 c=3.648
	MgSiAs2	202.24		IШаблон:Overbar2d	a=5.9078 c=10.600 Z=4	369.96	3.63
	Mg3Si6As8	840.33	cubic	P4332	a=11.600 Z=4	1560.9	3.58	red
	K2SiAs2			Ibam	a=13.132 b=6.999 c=6.340 Z=4			golden; explosive decomposition; air sensitive; CAS No=108945-44-4
	KSi3As3			Pbam	a=10.010b=19.139 c=3.664 Z=4			purple; 2D framework
	Sr3Si2As4							metallic red; chains
	CdSiAs2		tetragonal	IШаблон:Overbar2d	a = 5.884 c = 10.882 Z=8
	Cd7SiAs6	1264.41	cubic	P213	a=10.9820 Z=4	1324.5	6.343	black
	Cs0.16SiAs2							water stable
	Cs2SiAs2		orthorhombic	Ibam	a=7.571 b=14.425 c=6.42			water sensitive
	Cs5SiAs3		orthorhombic	Pnma	a=14.467 b=6.043 c=15.82			dark red metallic; air sensitive; planar
	Cs0.11Zn0.05Si0.95As	119.39	monoclinic	C2/m	a=35.201 b=3.6649 c=9.9848 β=91.863° Z=24	1287.4	3.70	black
	Ba4SiAs4							dark metallic; unstable in air
	BaCuSi2As3			P n m a	a 13.169 b 10.502 c 4.615			thermal insulate, electrical conductor
	Ba13Si6Sn8As22	4551.72	tetragonal	IШаблон:Overbar2m	a = 14.4857, c = 13.5506 Z=2	2843.4	5.316	black; Si4As10 units; band gap 1.0 eV
	LaSiAs3		orthorhombic	Pbca	a=6.0855 b=5.9837 c=26.2279 Z=8
	LaSiAs3		orthorhombic	Pn21a	a=6.0498 b=5.9545 c=26.383 Z=8
	CeSiAs3		orthorhombic	Pn21a	a=5.998 b=5.906 c=26.231 Z=8
	PrSiAs3		orthorhombic	Pn21a	a = 5.949, b = 5.877, c = 26.149 Z=8
	AuSiAs		monoclinic	Cc	a 7.2000 b 6.1614 c 6.1646, β =119.135°