ElementArsenic
SymbolAs
Atomic Mass74.9216
Atomic Number33
Name OriginsGreek, arsenikon = yellow orpiment
Year Discovered1230
Discovered CreditsProbably first isolated by Alertus Magus (1193-1280).
RemarksMetalloid 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 TestsArsenides, sulpharsenites, etc. (As2-), 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.
ReferencesEmsley, J., 1991; THE ELEMENTS : Sec. Ed., Clarendon Press, Oxford, 251 p.

Naturally Ocurring Isotopes :

Mass Nuclide Number Natural Abundance Half-life Half-life Unit Decay Mode Decay Mode MeV Decay Mode %
74.921594 75 100 % Stable

507 Minerals sorted by % of As (Arsenic) :

Arsenolamprite100.00 %As
Arsenic100.00 %As
Pararsenolamprite92.04 %As
Duranusite90.33 %As4S
Nickel-skutterudite78.12 %(Ni,Co)As3-x
Skutterudite76.09 %(Co,Ni)As3-x
Arsenolite75.74 %As2O3
Claudetite75.74 %As2O3
Dimorphite75.70 %As4S3
Lollingite72.85 %FeAs2
Clinosafflorite72.10 %(Co,Fe,Ni)As2
Safflorite72.04 %(Co,Fe)As2
Rammelsbergite71.86 %NiAs2
Pararammelsbergite71.86 %NiAs2
Krutovite71.86 %NiAs2
Paxite70.22 %Cu2As3
Pararealgar70.03 %AsS
Realgar70.03 %AsS
Alacranite70.03 %As4S4
Uzonite65.15 %As4S5
Orpiment60.90 %As2S3
Westerveldite56.79 %(Fe,Ni,Co)As
Modderite56.30 %(Co,Fe)As
Nickeline56.07 %NiAs
Langisite56.00 %(Co,Ni)As
Anduoite54.85 %(Ru,Os)As2
Trippkeite54.02 %CuAs+++2O4
Karibibite53.86 %Fe+++2As+++4(O,OH)9
Leiteite53.66 %ZnAs+++2O4
Ludlockite-(Pb)48.91 %PbFe++4As+++++10O22
Ludlockite48.45 %(Fe++,Pb)As+++++2O8
Maucherite48.14 %Ni11As8
Asbecasite47.45 %Ca3(Ti,Sn)As+++6Si2Be2O20
Omeiite47.16 %(Os,Ru)As2
Iridarsenite46.93 %(Ir,Ru)As2
IMA1999-00746.84 %Ca(H2AsO4)2
Schneiderhohnite46.48 %Fe++Fe+++3As+++5O13
Oregonite46.38 %Ni2FeAs2
Lazarenkoite46.18 %CaFe++As+++3O73(H2O)
Jeromite46.11 %As(S,Se)2
Arsenopyrite46.01 %FeAsS
Alloclasite45.37 %(Co,Fe)AsS
Glaucodot45.37 %(Co,Fe)AsS
Ruthenarsenite45.30 %(Ru,Ni)As
Gersdorffite45.22 %NiAsS
Alarsite45.16 %AlAsO4
Cobaltite45.16 %CoAsS
Lautite43.93 %CuAsS
Sperrylite43.44 %PtAs2
Laphamite42.62 %As2(Se,S)3
Cherepanovite42.13 %RhAs
Weilite41.62 %CaHAsO4
Haidingerite41.39 %Ca(AsO3OH)(H2O)
Nickenichite40.90 %Na0,8Ca0,4(Mg,Fe+++,Al)3Cu0,4(AsO4)3
Wakabayashilite40.40 %(As,Sb)11S18
Cafarsite40.31 %Ca8(Ti,Fe++,Fe+++,Mn)6-7(As+++O3)124(H2O)
Kaatialaite38.90 %Fe+++[H2As+++++O4]35-5.5(H2O)
Berzeliite38.22 %(Ca,Na)3(Mg,Mn)2(AsO4)3
Stibarsen38.09 %SbAs
Mcnearite37.68 %NaCa5H4(AsO4)54(H2O)
Mansfieldite37.10 %AlAsO42(H2O)
Johillerite37.03 %Na(Mg,Zn)3Cu(AsO4)3
Odanielite37.02 %Na(Zn,Mg)3H2(AsO4)3
Irhtemite36.80 %Ca4Mg(AsO3OH)2(AsO4)24(H2O)
Bergslagite36.54 %CaBe(AsO4)(OH)
Fluckite36.47 %CaMn(HAsO4)22(H2O)
Armangite36.40 %Mn26As+++18O50(OH)4(CO3)
Manganberzeliite36.33 %(Ca,Na)3(Mn,Mg)2(AsO4)3
Cabalzarite36.22 %Ca(Mg,Al,Fe++)2(AsO4)2(H2O,OH)2
Sainfeldite36.10 %Ca5(AsO3OH)2(AsO4)24(H2O)
Durangite36.04 %NaAl(AsO4)F
Ruarsite36.01 %RuAsS
IMA2000-01135.89 %KCaCu5(AsO4)4[As(OH)2O2]2H2O
Talmessite35.82 %Ca2Mg(AsO4)22(H2O)
Johnbaumite35.44 %Ca5(AsO4)3(OH)
Vladimirite35.33 %Ca5(AsO3OH)2(AsO4)25(H2O)
Svabite35.33 %Ca5(AsO4)3F
Jolliffeite35.24 %(Ni,Co)AsSe
Wendwilsonite35.09 %Ca2(Mg,Co)(AsO4)22(H2O)
Fetiasite35.09 %(Fe++,Fe+++,Ti++++)3O2(As+++2O5)
Arseniopleite34.87 %NaCaMn++3(AsO4)3
Orcelite34.86 %Ni5-xAs2 (x=0.23)
Hutchinsonite34.85 %(Pb,Tl)2As5S9
Pharmacolite34.68 %CaHAsO42(H2O)
Novakite34.49 %(Cu,Ag)21As10
Grischunite34.49 %NaCa2Mn++5Fe+++(AsO4)62(H2O)
Cobaltkoritnigite34.29 %(Co,Zn)(AsO3OH)(H2O)
Adelite34.01 %CaMg(AsO4)(OH)
Vayrynenite34.00 %MnBe(PO4)(OH,F)
Menshikovite33.98 %Pd3NiAs3
Brandtite33.95 %Ca2(Mn,Mg)(AsO4)22(H2O)
Reinerite33.90 %Zn3(As+++O3)2
Geminite33.83 %Cu++2As+++++2O73(H2O)
Magnussonite33.80 %Mn++5As+++3O9(OH,Cl)
Borishanskiite33.74 %Pd1+x(As,Pb)2, x = 0-0.2
Roselite-beta33.73 %Ca2(Co,Mg)(AsO4)22(H2O)
Roselite33.73 %Ca2(Co,Mg)(AsO4)22(H2O)
Tilasite33.70 %CaMg(AsO4)F
Manganarsite33.55 %Mn++3As+++204(OH)4
Koritnigite33.55 %Zn(AsO3OH)(H2O)
IMA2001-02633.52 %Ca(Mn+++,Mg,)2(AsO4)2(OH,H2O)2
IMA2000-02033.51 %Fe4[AsO3OH]5[AsO2(OH)2]220H2O
Parabrandtite33.38 %Ca2Mn++(AsO4)2(H2O)
Calcioandyrobertsite33.16 %KCaCu5(AsO4)4[As(OH)2O2]-2(H2O)
Villyaellenite33.13 %Mn++5(AsO3OH)2(AsO4)24(H2O)
Xanthiosite33.01 %Ni3(AsO4)2
Chernovite-(Y)32.89 %YAsO4
Bradaczekite32.76 %NaCu4(AsO4)3
Nanlingite32.64 %CaMg4(AsO3)2F4
Gaitite32.62 %Ca2Zn(AsO4)22(H2O)
Zincroselite32.62 %Ca2Zn(AsO4)22(H2O)
Krautite32.59 %MnAs+++++O3(OH)2(H2O)
Guerinite32.57 %Ca5(AsO3OH)2(AsO4)29(H2O)
Ferrarisite32.57 %Ca5(AsO3OH)2(AsO4)29(H2O)
Pushcharovskite32.50 %Cu(AsO3OH)1.5(H2O)
Parascorodite32.46 %Fe+++AsO42(H2O)
Scorodite32.46 %Fe+++AsO42(H2O)
Ekatite32.33 %(Fe+++,Fe++,Zn)12(OH)6[AsO3]6[AsO3,HOSiO3]2
IMA2001-05432.32 %CaFe+++2(AsO4)2(OH)2
Prosperite32.11 %CaZn2(AsO4)2(H2O)
Koutekite32.05 %Cu5As2
Lukrahnite31.97 %Ca(Cu,Zn)(Fe,Zn)(AsO4)2(OH,H2O)2
Cobaltlotharmeyerite31.96 %Ca(Co,Fe,Ni)2(AsO4)2(OH,H2O)2
Caryinite31.89 %(Na,Pb)(Ca,Na)(Ca,Mn++)(Mn++,Mg)2(AsO4)3
Picropharmacolite31.87 %Ca4Mg(AsO3OH)2(AsO4)211(H2O)
Pharmacosiderite31.84 %KFe+++4(AsO4)3(OH)46-7(H2O)
Imhofite31.79 %Tl6CuAs16S40
Stranskiite31.74 %Zn2Cu++(AsO4)2
Brassite31.71 %Mg(AsO3OH)4(H2O)
Maxwellite31.65 %NaFe+++(AsO4)F
Hollingworthite31.49 %(Rh,Pt,Pd)AsS
Chudobaite31.42 %(Mg,Zn)5(AsO3OH)2(AsO4)210(H2O)
Stibioenargite31.35 %Cu3(Sb,As)S4
Yvonite31.28 %Cu(AsO3OH)2(H2O)
Stenhuggarite31.25 %CaFe+++(As+++O2)(As+++Sb+++O5)
Majakite31.21 %PdNiAs
Andyrobertsite31.17 %KCdCu5(AsO4)4[As(OH)2O2]-2(H2O)
IMA2000-00131.16 %Cu2Fe+++(AsO4)[As+++O2(OH)2]H2O
Sinnerite30.91 %Cu6As4S9
Sartorite30.88 %PbAs2S4
Theoparacelsite30.80 %Cu3(OH)2(As2O7)
Kolfanite30.69 %Ca2Fe+++3O2(AsO4)32(H2O)
Wilhelmkleinite30.65 %ZnFe+++3(AsO4)2(OH)2
Ferrilotharmeyerite30.53 %Ca(Zn,Cu++)(Fe+++,Zn)(AsO4)2(OH,H2O)2
Urusovite30.52 %Cu[AlAsO5]
Lotharmeyerite30.50 %CaZnMn+++(AsO3OH)4(OH)3
Bearsite30.45 %Be2(AsO4)(OH)4(H2O)
Smithite30.34 %AgAsS2
Trechmannite30.34 %AgAsS2
Hornesite30.28 %Mg3(AsO4)28(H2O)
Sterlinghillite30.17 %Mn++3(AsO4)23(H2O)
Alumopharmacosiderite30.01 %KAl4(AsO4)3(OH)465(H2O)
Nickellotharmeyerite29.86 %Ca(Ni,Fe,Co)2(AsO4)2(OH,H2O)2
Dienerite29.85 %Ni3As
Polkanovite29.81 %Rh12As7
Turneaureite29.70 %Ca5[(As,P)O4]3Cl
Gillulyite29.60 %Tl2(As,Sb)8S13
Geigerite29.60 %Mn5(AsO3OH)2(AsO4)210(H2O)
Keyite29.57 %Cu++3(Zn,Cu)4Cd2(AsO4)62(H2O)
Irarsite29.46 %(Ir,Ru,Rh,Pt)AsS
Cobaltaustinite29.39 %CaCo(AsO4)(OH)
Warikahnite29.38 %Zn3(AsO4)22(H2O)
Arseniosiderite29.32 %Ca2Fe+++3(AsO4)3O23(H2O)
Oenite29.31 %CoSbAs
Nickelaustinite29.22 %Ca(Ni,Zn)(AsO4)(OH)
Lindackerite29.14 %Cu5(AsO3OH)2(AsO4)210(H2O)
Kankite29.06 %Fe+++AsO43.5(H2O)
Conichalcite28.87 %CaCu(AsO4)(OH)
Fahleite28.73 %Zn5CaFe+++2(AsO4)614(H2O)
Austinite28.66 %CaZn(AsO4)(OH)
Rathite28.45 %(Pb,Tl)3As5S10
Smolianinovite28.40 %(Co,Ni,Mg,Ca)3(Fe+++,Al)2(AsO4)411(H2O)
Platarsite28.27 %(Pt,Rh,Ru)AsS
Zinclavendulan28.27 %NaCa(Zn,Cu)5(AsO4)4Cl4-5(H2O)
Lemanskiite28.22 %NaCaCu5(AsO4)4Cl5(H2O)
Lavendulan28.22 %NaCaCu5(AsO4)4Cl5(H2O)
Domeykite28.21 %Cu3As
Sarkinite28.19 %Mn++2(AsO4)(OH)
Eveite28.19 %Mn2(AsO4)(OH)
Chernovite-(Ce)28.14 %(Ce,Y)(AsO4)
Shubnikovite28.08 %Ca2Cu8(AsO4)6Cl(OH)7(H2O) (?)
Vajdakite27.98 %[(MoO2)2(H2O)2As2O5](H2O)
Rollandite27.58 %Cu3(AsO4)24(H2O)
Luetheite27.50 %Cu2Al2(AsO4)2(OH)4(H2O)
Simonite27.34 %TlHgAs3S6
Angelellite27.28 %Fe+++4(AsO4)2O3
Osarsite27.25 %(Os,Ru)AsS
IMA2001-05227.02 %CoFe+++2(AsO4)2(OH)24(H2O)
Gasparite-(Ce)26.85 %CeAsO4
Barium-alumopharmacosiderite26.85 %BaAl4(AsO4)3(OH)55(H2O)
Ojuelaite26.71 %ZnFe+++2(AsO4)2(OH)24(H2O)
Manganese-hornesite26.58 %(Mn,Mg)3(AsO4)28(H2O)
IMA1998-02526.57 %NaCa2Al2(AsO4)[AsO3(OH)](OH)2F4(H2O)
Esperanzaite26.57 %NaCa2Al2(As+++++O4)2F4(OH)2(H2O)
Rhodarsenide26.52 %(Rh,Pd)2As
Fermorite26.48 %(Ca,Sr)5(AsO4,PO4)3(OH)
Olivenite26.47 %Cu2AsO4(OH)
Ogdensburgite26.46 %Ca2(Zn,Mn)Fe+++4(AsO4)4(OH)66(H2O)
Palladodymite26.31 %(Pd,Rh)2As
Adamite26.13 %Zn2(AsO4)(OH)
Paradamite26.13 %Zn2(AsO4)(OH)
Liveingite26.07 %Pb9As13S28
Palladoarsenide26.04 %Pd2As
Rauenthalite25.91 %Ca3(AsO4)210(H2O)
Yanomamite25.86 %In(AsO4)2(H2O)
Rosslerite25.80 %Mg(AsO3OH)7(H2O)
Rouseite25.71 %Pb2Mn++(As+++O3)22(H2O)
Getchellite25.58 %AsSbS3
Ferrisymplesite25.55 %Fe+++3(AsO4)2(OH)35(H2O)
Parasymplesite25.42 %Fe++3(AsO4)28(H2O)
Symplesite25.42 %Fe++3(AsO4)28(H2O)
Tooeleite25.35 %Fe+++(8-2x)[(As(1-x),S(x))O4]65(H2O)
Lammerite25.17 %Cu3[(As,P)O4]2
Edenharterite25.17 %TlPbAs3S6
Cahnite25.15 %Ca2B(AsO4)(OH)4
Bulachite25.15 %Al2(AsO4)(OH)33(H2O)
Phaunouxite25.13 %Ca3(AsO4)11(H2O)
Annabergite25.06 %Ni3(AsO4)28(H2O)
Erythrite25.03 %Co3(AsO4)28(H2O)
Chenevixite24.86 %Cu2Fe+++2(AsO4)2(OH)4(H2O)
Metakottigite24.82 %(Zn,Fe+++,Fe++)3(AsO4)28((H2O),OH)
Baumhauerite-2a24.77 %Pb3As4S9
Baumhauerite24.77 %Pb3As4S9
Cobalttsumcorite24.66 %Pb(Co,Fe)2(AsO4)2(OH,H2O)2
Legrandite24.59 %Zn2(AsO4)(OH)(H2O)
Yukonite24.58 %Ca7Fe+++11(AsO4)9O1024.3(H2O)
Strashimirite24.52 %Cu8(AsO4)4(OH)45(H2O)
Zdenekite24.38 %NaPbCu++5(AsO4)4Cl5(H2O)
Pitticite24.26 %Hydrous ferric arsenate sulfate (Fe, AsO4, SO4, H2O)
Kottigite24.24 %Zn3(AsO4)28(H2O)
Schlossmacherite24.24 %(H3O,Ca)Al3(AsO4,SO4)2(OH)6
Kutinaite24.18 %Cu2AgAs
Arsenoclasite24.15 %Mn5(AsO4)2(OH)4
Camgasite24.14 %CaMg(AsO4)(OH)5(H2O)
Mahnertite24.12 %(Na,Ca)Cu++3(AsO4)2Cl5(H2O)
Sodium-pharmacosiderite24.07 %(Na,K)2Fe+++4(AsO4)3(OH)57(H2O)
Tsumcorite24.00 %PbZnFe++(AsO4)2(H2O)
IMA1998-00423.83 %Pb32As40S92
Carminite23.76 %PbFe+++2(AsO4)2(OH)2
Nowackiite23.75 %Cu6Zn3As4S12
Jamesite23.66 %Pb2Zn2Fe+++5(AsO4)5O4
Barium-pharmacosiderite23.60 %BaFe+++4(AsO4)3(OH)55(H2O)
IMA1999-02823.46 %Bi(Ni,Co)2(AsO4)2(OH,H2O)2
IMA1999-02723.45 %Bi(Co,Ni)2(AsO4)2(OH,H2O)2
Rappoldite23.36 %Pb(Co,Ni,Zn,)2(AsO4)22(H2O)
Mapimite23.33 %Zn2Fe+++3(AsO4)3(OH)410(H2O)
Dixenite23.31 %Cu+Mn++14Fe+++(As+++O3)5(SiO4)2(As+++++O4)(OH)6
Paulmooreite23.26 %Pb2As+++2O5
Zincgartrellite23.11 %Pb(Zn,Fe,Cu)2(AsO4)2(OH,H2O)2
Thometzekite23.09 %Pb(Cu,Zn)2(AsO4)22(H2O)
Mawbyite23.09 %Pb(Fe+++Zn)2(AsO4)2(OH,H2O)2
Aerugite23.01 %([ ],Ni)9(AsO4)2(AsO6) (?)
Helmutwinklerite22.99 %PbZn2(AsO4)22(H2O)
Ceruleite22.90 %Cu2Al7(AsO4)4(OH)1312(H2O)
Richelsdorfite22.69 %Ca2Cu5Sb(AsO4)4Cl(OH)66(H2O)
Akrochordite22.64 %Mn4Mg(AsO4)2(OH)44(H2O)
Agardite-(Ca)22.61 %CaCu6(AsO4)3(OH)63(H2O)
Goudeyite22.48 %(Al,Y)Cu6(AsO4)3(OH)63(H2O)
Dussertite22.44 %BaFe+++3(AsO4)2(OH)5
IMA2000-00522.40 %Ca2Mn3O2(AsO4)2(CO3)3H2O
Philipsbornite22.40 %PbAl3(AsO4)2(OH)5(H2O)
Zalesiite22.37 %(Ca,Y)Cu6[(AsO4)2(AsO3OH)(OH)6]3(H2O)
Arsenowaylandite22.37 %BiAl3(AsO4)2(OH)6
Arsenogorceixite22.25 %BaAl3AsO3(OH)(AsO4,PO4)(OH,F)6
Euchroite22.23 %Cu2(AsO4)(OH)3(H2O)
Cornubite21.98 %Cu5(AsO4)2(OH)4
Cornwallite21.98 %Cu5(AsO4)2(OH)4
Zykaite21.96 %Fe+++4(AsO4)3(SO4)(OH)15(H2O)
Lorandite21.82 %TlAsS2
Gerdtremmelite21.82 %ZnAl2(AsO4)(OH)5
Agardite-(Y)21.80 %(Y,Ca)Cu6(AsO4)3(OH)63(H2O)
Arsenoflorencite-(Ce)21.65 %(Ce,La)Al3(AsO4)2(OH)6
Schultenite21.58 %PbHAsO4
Rooseveltite21.54 %BiAsO4
Tetrarooseveltite21.54 %BiAsO4
Trigonite21.48 %Pb3Mn(As+++O3)2(As+++O2OH)
Gartrellite21.43 %Pb(Cu,Fe++)2(AsO4,SO4)2(CO3,H2O)0.7
Dervillite21.12 %Ag2AsS2
Machatschkiite21.04 %Ca6(AsO4)(AsO3OH)3(PO4,SO4)15(H2O)
Agardite-(La)21.04 %(La,Ca)Cu6(AsO4)3(OH)63(H2O)
Agardite-(Ce)21.02 %(Ce,Ca)Cu6(AsO4)3(OH)63(H2O)
Stillwaterite20.89 %Pd8As3
Arsenoflorencite-(Nd)20.85 %(Nd,La,Ce,Ba)(Al,Fe+++)3(AsO4,PO4)2(OH)6
Agardite-(Dy)20.75 %(Dy,La,Ca)Cu6(AsO4)3(OH)63(H2O)
Agardite-(Nd)20.70 %(Nd,La,Ce,Ca)Cu6(AsO4)3(OH)63(H2O)
Dufrenoysite20.68 %Pb2As2S5
Vrbaite20.64 %Tl4Hg3Sb2As8S20
Bayldonite20.59 %(Cu,Zn)3Pb(AsO4)2(OH)2
Synadelphite20.57 %(Mn,Mg,Ca,Pb)9(As+++O3)(As+++++O4)2(OH)92(H2O) (?)
Rebulite20.42 %Tl5Sb5As8S22
Tennantite20.26 %(Cu,Fe)12As4S13
Flinkite20.15 %Mn++2Mn+++(AsO4)(OH)4
Zimbabweite20.01 %Na(Pb,Na,K)2(Ta,Nb,Ti)4As+++4O18
Wallkilldellite19.90 %Ca4Mn++6As+++++4O16(OH)818(H2O)
Segnitite19.83 %PbFe+++3H(AsO4)2(OH)6
Arthurite19.74 %CuFe+++2(AsO4,PO4,SO4)2(O,OH)24(H2O)
Gilmarite19.69 %Cu3(AsO4)(OH)3
Clinoclase19.69 %Cu3(AsO4)(OH)3
Stalderite19.68 %TlCu(Zn,Fe,Hg)2As2S6
Barium-zinc-alumopharmacosiderite19.67 %(Ba,K)0.5(Zn,Cu)0.5(Al,Fe)4(AsO4)35(H2O)
Bernardite19.66 %Tl(As,Sb)5S8
Paakkonenite19.58 %Sb2AsS2
IMA1998-03219.54 %Cu10(AsO4)4(SO4)(OH)68(H2O)
Arsenbrackebuschite19.50 %Pb2(Fe++,Zn)(AsO4)2(H2O)
Hedyphane19.48 %Ca2Pb3(AsO4)3Cl
Weilerite19.47 %BaAl3H[(As,P)O4]2(OH)6
Mixite19.32 %BiCu6(AsO4)3(OH)63(H2O)
Tyrolite19.24 %CaCu5(AsO4)2(CO3)(OH)46(H2O)
Juanitaite19.20 %(Cu,Ca,Fe)10Bi(AsO4)4(OH)112H2O
Sicherite19.19 %TlAg2(As,Sb)3S6
Arhbarite19.16 %Cu2(AsO4)(OH)6(H2O)
Arsenogoyazite19.05 %(Sr,Ca,Ba)Al3(AsO4,PO4)2(OH,F)5(H2O)
Palladobismutharsenide19.05 %Pd2(As,Bi)
Luzonite19.02 %Cu3AsS4
Chadwickite19.02 %(UO2)H(AsO3)
Enargite19.02 %Cu3AsS4
Arsenocrandallite18.86 %(Ca,Sr)Al3[(As,P)O4]2(OH)5(H2O)
Daomanite18.84 %
Wallisite18.82 %PbTl(Cu,Ag)As2S5
Allactite18.77 %Mn7(AsO4)2(OH)8
Morelandite18.62 %(Ba,Ca,Pb)5(AsO4,PO4)3Cl
Arsenoflorencite-(La)18.58 %(La,Sr)Al3(AsO4,SO4,PO4)2(OH)6
Fianelite18.53 %Mn++2V+++++(V+++++,As+++++)O72(H2O)
Wallkilldellite-(Fe)18.40 %(Ca,Cu)4Fe6[(As,Si)O4]4(OH)818H2O
Quadratite18.26 %Ag(Cd,Pb)AsS3
Clinotyrolite18.22 %Ca2Cu9[(As,S)O4]4(OH)1010(H2O)
Seelite-118.10 %Mg[(UO2)(AsO3)x(AsO4)1-x]27(H2O)
Hatchite18.03 %(Pb,Tl)2AgAs2S5
Aktashite17.97 %Cu6Hg3As4S12
Gabrielsonite17.88 %PbFe++(AsO4)(OH)
Paganoite17.73 %(Ni,Co)BiAsO5
Watanabeite17.70 %Cu4(As,Sb)2S5
Duftite-alpha17.56 %PbCu(AsO4)(OH)
Duftite-beta17.56 %PbCu(AsO4)(OH)
Arsendescloizite17.48 %PbZn(AsO4)(OH)
Liroconite17.30 %Cu2Al(AsO4)(OH)44(H2O)
Erniggliite17.23 %Tl2SnAs2S6
Neustadtelite17.22 %Bi2Fe+++(Fe+++,Co)(O,OH)2(OH)2(AsO4)2
Jentschite17.11 %TlPbAs2SbS6
Cobaltneustadtelite17.09 %Bi2Fe+++(Co,Fe+++)(O,OH)2(OH)2(AsO4)2
Medenbachite17.03 %Bi2Fe+++(Cu,Fe+++)(O,OH)2(OH)2(AsO4)2
Arsenopalladinite17.03 %Pd8(As,Sb)3
Liskeardite16.99 %(Al,Fe+++)3(AsO4)(OH)65(H2O)
Retzian-(La)16.98 %(Mn,Mg)2(La,Ce,Nd)(AsO4)(OH)4
Seligmannite16.96 %PbCuAsS3
Chabourneite16.89 %(Tl,Pb)21(Sb,As)91S147
Sarmientite16.51 %Fe+++2(AsO4)(SO4)(OH)5(H2O)
Algodonite16.42 %Cu6As
Retzian-(Ce)16.40 %Mn2Ce(AsO4)(OH)4
Retzian-(Nd)16.31 %Mn2(Nd,Ce,La)(AsO4)(OH)4
Jarosewichite16.26 %Mn++3Mn+++(AsO4)(OH)6
Atheneite16.12 %(Pd,Hg)3As
Magnesium-chlorophoenicite16.09 %(Mg,Mn)3Zn2(AsO4)(OH,O)6
Preisingerite15.98 %Bi3(AsO4)2O(OH)
Metanovacekite15.77 %Mg(UO2)2(AsO4)24-8(H2O)
Sodium-uranospinite15.73 %(Na2,Ca)(UO2)2(AsO4)25(H2O)
Laffittite15.62 %AgHgAsS3
Finnemanite15.61 %Pb5(As+++O3)3Cl
Galkhaite15.61 %(Cs,Tl)(Hg,Cu,Zn)6(As,Sb)4S12
Hallimondite15.57 %Pb2(UO2)(AsO4)2
Trogerite15.54 %(UO2)3(AsO4)212(H2O) (?)
Arakiite15.47 %(Zn,Mn++)(Mn++,Mg)12(Fe+++,Al)2(AsO3)(AsO4)2(OH)23
Marrite15.41 %PbAgAsS3
Pierrotite15.35 %Tl2Sb6As4S16
Hematolite15.31 %(Mn,Mg,Al)15(AsO3)(AsO4)2(OH)23
Bukovskyite15.30 %Fe+++2(AsO4)(SO4)(OH)7(H2O)
Chlorophoenicite15.29 %(Mn,Mg)3Zn2(AsO4)(OH,O)6
Proustite15.14 %Ag3AsS3
Xanthoconite15.14 %Ag3AsS3
Clinomimetite15.10 %Pb5(AsO4)3Cl
Mimetite15.10 %Pb5(AsO4)3Cl
Feinglosite14.95 %Pb2(Zn,Fe)[(As,S)O4]2(H2O)
Meta-uranospinite14.95 %Ca(UO2)2(AsO4)28(H2O)
Mgriite14.91 %Cu3AsS3
Philipsburgite14.79 %(Cu,Zn)6(AsO4,PO4)2(OH)6(H2O)
IMA1996-00114.77 %Cu5(Te++++++O4)2(AsO4)22(H2O)
Metakahlerite14.72 %Fe++(UO2)2(AsO4)28(H2O)
Holdenite14.71 %(Mn,Mg)6Zn3(AsO4)2(SiO4)(OH)8
Metakirchheimerite14.68 %Co(UO2)2(AsO4)28(H2O)
Juabite14.68 %(Ca,Fe++)Cu10(Te++++O3)4(As+++++O4)4(OH)24(H2O)
Metazeunerite14.61 %Cu(UO2)2(AsO4)28(H2O)
Arsenosulvanite14.49 %Cu3(As,V)S4
Kemmlitzite14.45 %(Sr,Ce)Al3(AsO4)(SO4)(OH)6
Uranospinite14.43 %Ca(UO2)2(AsO4)210(H2O)
Abernathyite14.41 %K(UO2)(AsO4)4(H2O)
Sabelliite14.26 %Cu2Zn(As,Sb)O4(OH)3
Novacekite14.16 %Mg(UO2)2(AsO4)212(H2O)
Zeunerite14.11 %Cu(UO2)2(AsO4)210-16(H2O)
Metalodevite14.09 %Zn(UO2)2(AsO4)210(H2O)
Lengenbachite14.00 %Pb6(Ag,Cu)2As4S13
Kahlerite13.98 %Fe++(UO2)2(AsO4)210-12(H2O)
Chursinite13.87 %Hg+Hg++(AsO4)
Seelite-213.67 %Mg(UO2)(AsO3)x(AsO4)1-x7(H2O) (x=0.7)
Metaheinrichite13.63 %Ba(UO2)2(AsO4)28(H2O)
Seinajokite13.54 %(Fe,Ni)(Sb,As)2
Gottlobite13.51 %CaMg(VO4,AsO4)(OH)
Palenzonaite13.03 %(Ca,Na)3Mn++(V+++++,As+++++,Si)3O12
Christite13.01 %TlHgAsS3
Cervandonite-(Ce)12.99 %(Ce,Nd,La)(Fe+++,Fe++,Ti++++,Al)3SiAs(Si,As)O13
Heinrichite12.99 %Ba(UO2)2(AsO4)210-12(H2O)
Gottardiite12.85 %Na3Mg3Ca5Al19Si117O27293(H2O)
Gebhardite12.77 %Pb8(As+++2O5)2OCl6
Tiragalloite12.74 %Mn++4As+++++Si3O12(OH)
Arsenuranospathite12.57 %HAl(UO2)4(AsO4)440(H2O)
Guettardite12.56 %Pb(Sb,As)2S4
Tsugaruite12.45 %Pb4As2S7
Arsenobismite12.32 %Bi2(AsO4)(OH)3
Chameanite12.13 %(Cu,Fe)4As(Se,S)4
Teruggite12.12 %Ca4MgAs2B12O22(OH)1212(H2O)
Argentotennantite12.10 %(Ag,Cu)10(Zn,Fe)2(As,Sb)4S13
Parnauite12.06 %Cu9(AsO4)2(SO4)(OH)107(H2O)
Kolicite12.04 %Mn7Zn4(AsO4)2(SiO4)2(OH)8
Hidalgoite11.98 %PbAl3(AsO4)(SO4)(OH)6
Kraisslite11.66 %(Mn++,Mg)24Zn3Fe+++(As+++O3)2(As+++++O4)3(SiO4)6(OH)18
Routhierite11.62 %TlCu(Hg,Zn)2(As,Sb)2S3
Tomichite11.57 %(V,Fe)4Ti3AsO13(OH)
Nealite11.49 %Pb4Fe++(As+++++O4)2Cl4
Gallobeudantite11.47 %PbGa3[(AsO4),(SO4)]2(OH)6
Nealite-(H2O)11.45 %Pb4Fe++(As+++O3)2Cl42(H2O)
Vozhminite11.44 %(Ni,Co)4(As,Sb)S2
Gratonite11.33 %Pb9As4S15
Parwelite11.30 %(Mn,Mg)5Sb(As,Si)2O12
Graeserite11.23 %(Fe+++,Ti)4Ti3AsO13(OH)
Giraudite11.00 %(Cu,Zn,Ag)12(As,Sb)4(Se,S)13
Beudantite10.53 %PbFe+++3(AsO4)(SO4)(OH)6
Arsentsumebite10.26 %Pb2Cu(AsO4)(SO4)(OH)
Walentaite10.21 %(Ca,Mn++,Fe++)Fe+++3(AsO4)(PO4)3(PO3OH)
Walpurgite10.10 %Bi4(UO2)(AsO4)2O42(H2O)
Orthowalpurgite10.10 %(UO2)Bi4O4(AsO4)22(H2O)
Coparsite10.07 %Cu4O2[(As,V)O4]Cl
Fornacite9.99 %Pb2Cu(CrO4)(AsO4)(OH)
Atelestite9.97 %Bi8(AsO4)3(OH)5O5
Fettelite9.84 %Ag24HgAs5S20
Palarstanide9.84 %Pd8(Sn,As)3
Schallerite9.75 %Mn++16[As+++O2OH][Si12O30](OH)14
Kuznetsovite9.65 %Hg3Cl(AsO4)
Isomertieite9.58 %Pd11Sb2As2
Ellisite9.55 %Tl3AsS3
Arsenuranylite9.52 %Ca(UO2)4(AsO4)2(OH)46(H2O)
Theisite9.49 %Cu5Zn5[(As+++++,Sb+++++)O4]2(OH)14
Nelenite9.40 %(Mn,Fe++)16Si12As+++3O36(OH)17
Vincentite9.37 %(Pd,Pt)3(As,Sb,Te)
Paraniite-(Y)9.32 %Ca2Y(AsO4)(WO4)2
Hugelite9.22 %Pb2(UO2)3(AsO4)2(OH)43(H2O)
Fangite9.18 %Tl3AsS4
Sodium-betpakdalite9.13 %(Na,Ca)3Fe+++2(As2Mo6O28)15(H2O)
Ecdemite9.10 %Pb6As+++2O7Cl4
Heliophyllite9.10 %Pb6As2O7Cl4
Reppiaite8.74 %Mn++[(V,As)O4(OH)2]2
Veenite8.69 %Pb2(Sb,As)2S5
Molybdofornacite8.53 %Pb2Cu[(As,P)O4][(Mo,Cr)O4](OH)
Paradocrasite8.08 %Sb2(Sb,As)2
Tvalchrelidzeite7.68 %Hg12(Sb,As)8S15
Chalcophyllite7.47 %Cu++18Al2(AsO4)3(SO4)3(OH)2733(H2O)
Manganostibite7.35 %(Mn++,Fe++)7(SbO4)(AsO4,SiO4)O4
Billingsleyite7.33 %Ag7AsS6
Johninnesite7.21 %Na2Mg4Mn++12(AsO4)2(Si12O35)(OH)6
Jordanite7.17 %Pb14(As,Sb)6S23
Jankovicite7.09 %Tl5Sb9(As,Sb)4S22
Dugganite6.90 %Pb3Zn3Te(As,V,Si)2(O,OH)14
Freedite6.84 %Pb8Cu+(As+++O3)2O3Cl5
Betpakdalite6.82 %[Mg(H2O)6]Ca2(H2O)13[Mo++++++8As+++++2Fe+++3O36(OH)]4(H2O)
Georgiadesite6.81 %Pb4(AsO3)Cl4(OH)
Pearceite6.72 %Ag16As2S11
Colusite6.72 %Cu12-13V(As,Sb,Sn,Ge)3S16
IMA1996-0436.60 %Pb3Sb+++++(SO4)(AsO4)(OH)63(H2O)
Mertieite-I6.60 %Pd11(Sb,As)4
Ardennite6.51 %(Mn++,Ca,Mg)4(Al,Mg,Fe)6(SiO4)2(Si3O10)(AsO4,VO4)(OH)6
Kirkiite6.36 %Pb10Bi3As3S19
Obradovicite5.96 %H4(K,Na)Cu++Fe+++2(AsO4)(MoO4)512(H2O)
Arsenpolybasite5.42 %(Ag,Cu)16(As,Sb)2S11
Hemloite5.35 %(As,Sb)2(Ti,V,Fe,Al)12O23OH
Gerstleyite5.25 %Na2(Sb,As)8S132(H2O)
Schumacherite4.99 %Bi3[(V,As,P)O4]2O(OH)
Sterryite4.95 %Ag2Pb10(Sb,As)12S29
Asselbornite4.64 %(Pb,Ba)(UO2)6(BiO)4(AsO4)2(OH)123(H2O)
Phosphoellenbergerite4.46 %Mg14(PO4)6(PO3OH,CO3)2(OH)6
Vicanite-(Ce)4.40 %(Ca,Ce,La,Th)15As+++++(As+++0.5,Na0.5)Fe+++Si6B4O40F7
Madocite4.38 %Pb17(Sb,As)16S41
Sahlinite4.33 %Pb14(AsO4)2O9Cl4
Parapierrotite4.32 %Tl(Sb,As)5S8
Caryopilite4.01 %(Mn++,Mg,Zn,Fe++)3(Si,As)2O510(OH,Cl)4
Freibergite3.88 %(Ag,Cu,Fe)12(Sb,As)4S13
Nabiasite3.82 %BaMn9[(V,As)O4]6(OH)2
Hakite3.70 %(Cu,Hg)3(Sb,As)(Se,S)3
Biehlite3.52 %(Sb,As)2MoO6
Germanocolusite3.49 %Cu13V(Ge,As)3S16
Turtmannite3.41 %(Mn,Mg)25.5[(V,As)O4]3(SiO4)3[AsO3]xO5-5x(OH)20+x
Arsenohauchecornite3.30 %Ni18Bi3AsS16
Nekrasovite3.28 %Cu+26V2(Sn,As,Sb)6S32
Goldfieldite3.17 %Cu12(Te,Sb,As)4S13
IMA2001-0102.90 %(Ag3Hg)(V,As)O4
Benleonardite2.85 %Ag8(Sb,As)Te2S3
Stibiocolusite2.78 %Cu13V(Sb,As,Sn)3S16
Santafeite2.51 %(Mn,Fe,Al,Mg)2(Mn++++,Mn++)2(Ca,Sr,Na)3(VO4,AsO4)4(OH)32(H2O)
Vinciennite2.36 %Cu10Fe4Sn(As,Sb)S16
Renierite2.26 %(Cu,Zn)11(Ge,As)2Fe4S16
Thorikosite2.16 %Pb3(Sb+++,As+++)O3(OH)Cl2
Baumstarkite2.15 %Ag3(Sb,As)2SbS6
Medaite1.81 %(Mn,Ca)6(V+++++,As)Si5O18(OH)
Antimonpearceite1.77 %(Ag,Cu)16(Sb,As)2S11
Geocronite1.73 %Pb14(Sb,As)6S23
Welshite1.70 %Ca2Mg4(Mn,Fe)Sb+++++2O2[Si3Be2O18]
Krettnichite1.35 %PbMn+++2(VO4)2(OH)2
Twinnite1.30 %Pb(Sb,As)2S4
Mertieite-II0.62 %Pd8(Sb,As)3
Sorbyite0.39 %Pb19(Sb,As)20S49