Mineral Species containing Arsenic (As)

Element Properties, Isotopic Compositions for Arsenic

**Arsenic (As) Element Properties**
Atomic Mass	74.9216
Atomic Number	33
Name Origins	Greek, arsenikon = "yellow orpiment."
Year Discovered	1230
Discovery Credits	Probably first isolated by Alertus Magus (1193-1280).
Remarks	Metalloid with several allotropes, Grey alpha-arsenic is metallic, soft and brittle, tarnishes, burns in O₂, resists attack by water, acids, and alkalis. Attacked by hot acids and molten NaOH. Uses: alloys, semiconductors, pesticides, wood preservatives, and glasses. Diagnostic tests: Arsenides, sulpharsenites, etc. (As^2-), give off fumes when roasted on charcoal, usually easily recognized by their peculiar garlic odor. In the open tube test, they give a white, volatile, crystalline sublimate of As₂O₃. The blue flame test for arsenic may be visible when the sublimate is blasted with the blowpipe flame. In the closed tube test with sulfur, they yield a sublimate of dark brown-red when hot and red or reddish yellow when cold; or a black to gray mirror sublimate of metallic arsenic. Arsenates (AsO₄) can be detected by the garlic odor yielded when a mixture of the powdered mineral with charcoal dust and Na₂CO₃ is heated with a reducing flame on charcoal.
References	Emsley, J., 1991; THE ELEMENTS : Sec. Ed., Clarendon Press, Oxford, 251 p.
See Also	WebElements, ChemiCool

**Naturally Occurring Isotopes**
Symbol	Isotope Mass	Isotope Nuclide Number	Isotope Number	Natural Abundance	Half-life	Half-life Units	Decay Mode	Decay Mode MeV	Decay Mode %
As	74.921594	75	33	100.0000%		Stable

Arsenic (As) Minerals sorted by Mineral Name

Click here for List sorted by Weight Percent

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**568 Minerals containing Arsenic (As) sorted by Mineral Name**
% As	Mineral Name	Chemical Formula	MW
9.49 % As	Theisite	Cu5Zn5[(As+++++,Sb+++++)O4]2(OH)14	1,184.04
30.80 % As	Theoparacelsite !	Cu3(OH)2(As2O7)	486.49
23.09 % As	Thometzekite	Pb(Cu,Zn)2(AsO4)2·2(H2O)	649.08
2.16 % As	Thorikosite	Pb3(Sb+++,As+++)O3(OH)Cl2	867.55
33.70 % As	Tilasite #	CaMg(AsO4)F	222.30
4.18 % As	Tillmannsite !	(Ag3Hg)(V,As)O4	645.05
12.74 % As	Tiragalloite	Mn++4As+++++Si3O12(OH)	587.93
11.57 % As	Tomichite	(V,Fe)4Ti3AsO13(OH)	647.82
25.35 % As	Tooeleite	Fe+++6(AsO3)4(SO4)(OH)4·4H2O	1,388.96
30.34 % As	Trechmannite #	AgAsS2	246.92
21.48 % As	Trigonite #	Pb3Mn(As+++O3)2(As+++O2OH)	1,046.31
54.02 % As	Trippkeite #	CuAs+++2O4	277.39
15.54 % As	Trogerite #	H2(UO2)2(AsO4)2·8(H2O)	964.03
12.45 % As	Tsugaruite !	Pb4As2S7	1,203.11
24.00 % As	Tsumcorite	PbZnFe++(AsO4)2·(H2O)	624.29
29.70 % As	Turneaureite	Ca5[(As,P)O4]3Cl	630.63
3.28 % As	Turtmannite !	(Mn,Mg)25.5[(V,As)O4]3(SiO4)3[AsO3]xO5-5x(OH)20+x	2,396.92
8.28 % As	Tvalchrelidzeite	Hg3SbAsS3	904.31
1.30 % As	Twinnite #	Pb(Sb,As)2S4	574.28
17.19 % As	Tyrolite #	CaCu5(AsO4)2(CO3)(OH)4·6(H2O)	871.78
0.20 % As	Ungavaite !	Pd4Sb3	790.08
9.77 % As	Uramarsite !	(NH4,H3O)2(UO2)2(AsO4,PO4)2·6H2O	935.42
14.43 % As	Uranospinite #	Ca(UO2)2(AsO4)2·10(H2O)	1,038.12
30.52 % As	Urusovite !	Cu[AlAsO5]	245.45
65.15 % As	Uzonite	As4S5	460.02
27.98 % As	Vajdakite !	[(MoO2)2(H2O)2As2O5]·(H2O)	535.57
8.69 % As	Veenite	Pb2(Sb,As)2S5	776.08
28.87 % As	Veselovskyite	(Zn,Cu,Co)Cu4(AsO4)2(AsO3OH)2·9H2O	1,038.21
4.40 % As	Vicanite-(Ce)	(Ca,Ce,La,Th)15As+++++(As+++0.5,Na0.5)Fe+++Si6B4O40F7	2,554.77
33.13 % As	Villyaellenite	Mn++5(AsO3OH)2(AsO4)2·4(H2O)	904.44
8.02 % As	Vincentite	(Pd,Pt)3(As,Sb,Te)	466.99
2.36 % As	Vinciennite	Cu10Fe4Sn(As,Sb)S16	1,588.95
35.33 % As	Vladimirite #	Ca5(AsO3OH)2(AsO4)2·5(H2O)	848.16
11.44 % As	Vozhminite	(Ni,Co)4(As,Sb)S2	392.79
20.64 % As	Vrbaite #	Tl4Hg3Sb2As8S20	2,903.50
8.39 % As	Vurroite !	Pb20Sn2(Bi,As)22S54Cl6	9,577.60
46.40 % As	Wakabayashilite	(As,Sb)6As4S14	1,291.80
10.21 % As	Walentaite	(Ca,Mn++,Fe++)Fe+++3(AsO4)(PO4)3(PO3OH)	733.47
18.82 % As	Wallisite	PbTl(Cu,Ag)As2S5	796.38
19.90 % As	Wallkilldellite	Ca4Mn++6As+++++4O16(OH)8·18(H2O)	1,505.95
18.40 % As	Wallkilldellite-(Fe) !	(Ca,Cu)4Fe6[(As,Si)O4]4(OH)8·18(H2O)	1,506.74
10.10 % As	Walpurgite #	Bi4(UO2)(AsO4)2O4·2(H2O)	1,483.82
29.38 % As	Warikahnite	Zn3(AsO4)2·2(H2O)	510.04
17.70 % As	Watanabeite	Cu4(As,Sb)2S5	592.45
0.72 % As	Waterhouseite !	Mn7(PO4)2(OH)8	727.16
19.47 % As	Weilerite	BaAl3H[(As,P)O4]2(OH)6	577.19
41.62 % As	Weilite	CaHAsO4	180.01
1.59 % As	Welshite	Ca4Mg9Sb3O4[Si6Be3AlFe2O36]	1,746.53
35.09 % As	Wendwilsonite	Ca2(Mg,Co)(AsO4)2·2(H2O)	426.99
56.79 % As	Westerveldite	(Fe,Ni,Co)As	131.93
30.65 % As	Wilhelmkleinite !	ZnFe+++3(AsO4)2(OH)2	488.94
33.01 % As	Xanthiosite #	Ni3(AsO4)2	453.91
15.14 % As	Xanthoconite #	Ag3AsS3	494.72
25.86 % As	Yanomamite	In(AsO4)·2(H2O)	289.77
37.16 % As	Yazganite !	NaFe+++2(Mg,Mn)(AsO4)3·H2O	602.82
24.58 % As	Yukonite #	Ca7Fe+++11(AsO4)9O10·24.3(H2O)	2,742.90
31.28 % As	Yvonite !	Cu(AsO3OH)·2(H2O)	239.50
22.37 % As	Zalesiite !	(Ca,Y)Cu6[(AsO4)2(AsO3OH)(OH)6]·3(H2O)	1,004.97
24.38 % As	Zdenekite	NaPbCu++5(AsO4)4Cl·5(H2O)	1,229.13
14.11 % As	Zeunerite #	Cu(UO2)2(AsO4)2·10-16(H2O)	1,061.59
20.01 % As	Zimbabweite	Na(Pb,Na,K)2(Ta,Nb,Ti)4As+++4O18	1,498.05
23.25 % As	Zincgartrellite !	Pb(Zn,Fe,Cu)2(AsO4)2(OH,H2O)2	644.39
28.27 % As	Zinclavendulan ?	NaCa(Zn,Cu)5(AsO4)4Cl·4-5(H2O)	1,059.91
2.72 % As	Zinclipscombite !	ZnFe+++2(PO4)2(OH)	386.04
26.30 % As	Zincolivenite !	CuZn(AsO4)(OH)	284.86
32.62 % As	Zincroselite	Ca2Zn(AsO4)2·2(H2O)	459.41
21.96 % As	Zykaite	Fe+++4(AsO4)3(SO4)(OH)·15(H2O)	1,023.45

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