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 Descending Weight Percent

Click here for List sorted by Mineral Name

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**568 Minerals containing Arsenic (As) sorted by Descending Weight Percent**
% As	Mineral Name	Chemical Formula	MW
6.72 % As	Colusite #	Cu12-13V(As,Sb,Sn,Ge)3S16	1,673.29
6.60 % As	Mertieite-I	Pd11(Sb,As)4	1,474.99
6.51 % As	Ardennite-(As) #	(Mn++,Ca,Mg)4(Al,Mg,Fe)6(SiO4)2(Si3O10)(AsO4,VO4)(OH)6	1,036.05
6.36 % As	Kirkiite	Pb10Bi3As3S19	3,532.96
5.96 % As	Obradovicite	H4(K,Na)Cu++Fe+++2(AsO4)(MoO4)5·12(H2O)	1,257.18
5.81 % As	Mallestigite !	Pb3Sb+++++(SO4)(AsO4)(OH)6·3(H2O)	1,135.63
5.42 % As	Arsenpolybasite	[Ag9CuS4] [(Ag,Cu)6(As,Sb)2S7]	2,074.59
5.35 % As	Hemloite	(As,Sb)2(Ti,V,Fe,Al)12O23OH	1,050.40
5.26 % As	Coiraite !	(Pb,Sn)12.5As3Sn5FeS28	4,256.03
5.25 % As	Gerstleyite #	Na2(Sb,As)8S13·2(H2O)	1,426.04
5.12 % As	Fianelite !	Mn++2V+++++(V+++++,As+++++)O7·2(H2O)	365.78
4.99 % As	Schumacherite	Bi3[(V,As,P)O4]2O(OH)	900.22
4.95 % As	Sterryite	Ag2Pb10(Sb,As)12S29	4,538.17
4.40 % As	Vicanite-(Ce)	(Ca,Ce,La,Th)15As+++++(As+++0.5,Na0.5)Fe+++Si6B4O40F7	2,554.77
4.38 % As	Madocite	Pb17(Sb,As)16S41	6,841.29
4.33 % As	Sahlinite #	Pb14(AsO4)2O9Cl4	3,464.44
4.32 % As	Parapierrotite	Tl(Sb,As)5S8	1,041.56
4.22 % As	Pearceite #	[Ag9CuS4] [(Ag,Cu)6(As,Sb)2S7]	2,096.80
4.18 % As	Tillmannsite !	(Ag3Hg)(V,As)O4	645.05
4.01 % As	Caryopilite #	(Mn++,Mg,Zn,Fe++)3(Si,As)2O510(OH,Cl)4	373.76
3.88 % As	Freibergite #	(Ag,Cu,Fe)12(Sb,As)4S13	1,929.46
3.82 % As	Nabiasite !	BaMn9[(V,As)O4]6(OH)2	1,372.20
3.77 % As	Asselbornite	(Pb,Ba)(UO2)6(BiO)4(AsO4)2(OH)12·3(H2O)	3,237.04
3.70 % As	Hakite	(Cu,Hg)3(Sb,As)(Se,S)3	606.78
3.52 % As	Biehlite !	(Sb,As)2MoO6	426.07
3.49 % As	Germanocolusite	Cu13V(Ge,As)3S16	1,609.66
3.30 % As	Arsenohauchecornite	Ni18Bi3AsS16	2,271.34
3.28 % As	Turtmannite !	(Mn,Mg)25.5[(V,As)O4]3(SiO4)3[AsO3]xO5-5x(OH)20+x	2,396.92
3.28 % As	Nekrasovite	Cu+26V2(Sn,As,Sb)6S32	3,426.88
2.91 % As	Roshchinite	Ag19Pb10Sb51S96 or Pb(Ag,Cu)2(Sb,As)5S10	12,887.63
2.85 % As	Benleonardite	Ag8(Sb,As)Te2S3	1,312.68
2.78 % As	Stibiocolusite	Cu13V(Sb,As,Sn)3S16	1,616.76
2.72 % As	Zinclipscombite !	ZnFe+++2(PO4)2(OH)	386.04
2.69 % As	Phosphowalpurgite !	(UO2)Bi4(PO4)O4·2(H2O)	1,391.69
2.61 % As	Polybasite #	[Ag9CuS4] [(Ag,Cu)6(Sb,As)2S7]	2,154.03
2.60 % As	Reppiaite	Mn++5[(V,As)O4]2(OH)4	577.39
2.57 % As	Cobaltkieserite !	CoSO4·H2O	175.01
2.55 % As	Ovamboite !	Cu20(Fe,Cu,Zn)6W2Ge6S32	3,470.24
2.51 % As	Santafeite #	(Mn,Fe,Al,Mg)2(Mn++++,Mn++)2(Ca,Sr,Na)3(VO4,AsO4)4(OH)3·2(H2O)	896.52
2.36 % As	Vinciennite	Cu10Fe4Sn(As,Sb)S16	1,588.95
2.27 % As	Maikainite !	Cu20(Fe,Cu)6Mo2Ge6S32	3,296.63
2.26 % As	Renierite #	(Cu,Zn)11(Ge,As)2Fe4S16	1,655.51
2.23 % As	Hundholmenite-(Y) !	(Y,REE,Ca,Na)15(Al,Fe+++)CaxAs+++1-x(Si,As+++++)Si6B3(O,F)48	2,521.06
2.16 % As	Thorikosite	Pb3(Sb+++,As+++)O3(OH)Cl2	867.55
2.15 % As	Baumstarkite !	Ag3(Sb,As)2SbS6	869.54
2.03 % As	Holtite	Al6(Al,Ta)(BO3)[(SiO4,SbO4,AsO4)]3(O,OH)3	2,589.58
1.92 % As	Suredaite !	PbSnS3	390.35
1.82 % As	Calciopetersite !	CaCu6[(PO4)2(PO3OH)(OH)6]·3(H2O)	907.06
1.81 % As	Medaite	(Mn,Ca)6(V+++++,As)Si5O18(OH)	827.82
1.80 % As	Goldfieldite #	Cu12(Te,Sb,As)4S13	1,665.23
1.77 % As	Antimonpearceite	[Ag9CuS4] [(Ag,Cu)6(Sb,As)2S7]	2,121.41
1.73 % As	Geocronite #	Pb14(Sb,As)6S23	4,321.99
1.68 % As	Phosphohedyphane !	Ca2Pb3(PO4)3Cl	1,068.23
1.59 % As	Welshite	Ca4Mg9Sb3O4[Si6Be3AlFe2O36]	1,746.53
1.45 % As	Calvertite !	Cu5Ge0.5S4	495.06
1.35 % As	Krettnichite !	PbMn+++2(VO4)2(OH)2	553.38
1.30 % As	Twinnite #	Pb(Sb,As)2S4	574.28
0.72 % As	Waterhouseite !	Mn7(PO4)2(OH)8	727.16
0.62 % As	Mertieite-II	Pd8(Sb,As)3	1,211.93
0.60 % As	Selenopolybasite !	[(Ag,Cu)6(Sb,As)2(S,Se)7][Ag9Cu(S,Se)2Se2]	2,378.81
0.39 % As	Sorbyite	Pb19(Sb,As)20S49	5,737.49
0.31 % As	Naldretteite !	Pd2Sb	333.37
0.30 % As	Raadeite !	Mg7(PO4)2(OH)8	493.69
0.24 % As	Ardennite-(V) !	Mn++4[Al4(Mg,Al,Fe+++,Mn+++)2][Si5(V,Si)]O22(OH)6	1,015.46
0.20 % As	Ungavaite !	Pd4Sb3	790.08
0.11 % As	Scheuchzerite !	Na(Mn,Mg)9[VSi9O28(OH)](OH)3	1,309.36
0.11 % As	Proshchenkoite-(Y) !	(Y,REE,Ca,Na,Mn)15Fe++Ca(P,Si)Si6B3(O,F)48	2,711.51

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