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Arseniosiderite Mineral Data

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General Arseniosiderite Information

Help on Chemical  Formula: Chemical Formula: Ca2Fe+++3(AsO4)3O2•3(H2O)
Help on Composition: Composition: Molecular Weight = 766.50 gm
   Calcium   10.46 %  Ca   14.63 % CaO
   Iron      21.86 %  Fe   31.25 % Fe2O3
   Arsenic   29.32 %  As   44.98 % As2O5
   Hydrogen   0.79 %  H     7.05 % H2O
   Oxygen    37.57 %  O
            ______        ______ 
            100.00 %       97.91 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca2Fe3+3(AsO4)3O3•3(H2O)
Help on Environment: Environment: Occurs as a rare secondary mineral formed by the oxidation of earlier arsenic-bearing minerals, typically scorodite or arsenopyrite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1842
Help on Locality: Locality: From Romaneche, Saone-et-Loire, France. At Huttenberg, Carinthia, Austria. In Germany, at Schneeberg, Saxony, and at Wittichen and Neubulach, Black Forest. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For essential "arsenic" in the composition, and "sideros," Greek for "iron."
Help on Name Pronunciation: Name Pronunciation: Arseniosiderite + Pronunciation Say ARSENIOSIDERITE

Arseniosiderite Image

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Comments: Yellowish brown, roughly spherical aggregates of arseniosiderite crystals on matrix.
Location: Tsumeb mine, Tsumeb, Namibia. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

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  Cobaltarthurite   Arseniosiderite

Comments: Olive-greenish crystalline druse of cobaltarthurite with spherical arseniosiderite.
Location: Pastrana, Mazarrón, Murcia, Spain. Scale: Picture size 1.3 mm.
© Thomas Witzke / Abraxas-Verlag

Arseniosiderite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.9093:1:0.5785
Help on Cell Dimensions: Cell Dimensions: a = 17.76, b = 19.53, c = 11.3, Z = 12; beta = 96° V = 3,897.97 Den(Calc)= 3.92
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: A2/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 8.84(1), 2.772(0.8), 5.62(0.5),

Physical Properties of Arseniosiderite

Help on Cleavage: Cleavage: {100} Good
Help on Color: Color: Bronze brown, Yellow, Yellow brown, Dark brown, Black.
Help on Density: Density: 3.5 - 3.9, Average = 3.7
Help on Diaphaneity: Diaphaneity: Translucent to Opaque
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Hardness: Hardness: 1.5 - Between Talc and Gypsum
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Sub Metallic
Help on Streak: Streak: ochraceous

Optical Properties of Arseniosiderite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.041 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.018 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.222,KPDmeas= 0.2352,KC= 0.226
Ncalc = 1.79 - 1.89
Help on Optical Data: Optical Data: Biaxial (-), a=1.815, b=1.898, g=1.898, bire=0.0830

Calculated Properties of Arseniosiderite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.75 gm/cc
note: Specific Gravity of Arseniosiderite =3.92 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.004956593
Boson Index = 0.995043407
Help on Photoelectric: Photoelectric: PEArseniosiderite = 27.84 barns/electron
U=PEArseniosiderite x rElectron Density= 104.49 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Arseniosiderite is Not Radioactive

Arseniosiderite Classification

Help on  Dana Class: Dana Class: (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.08)where (AB)7 (XO4)4 Zq � x(H2O)
  (42.08.04)Mitridatite Group Mitridatite Ca2Fe3(PO4)3O2•3(H2O) A2/a 2/m Robertsite Ca6Mn9(PO4)9O6(H2O)6•3(H2O) A2/a 2/m Arseniosiderite Ca2Fe3(AsO4)3O2•3(H2O) A2/a 2/m
Help on  Strunz Class: Strunz Class: 08.DH.30 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DH -With large and medium-sized cations, (OH, etc.):RO4 < 1:1
08.DH.30 Arseniosiderite Ca2Fe3(AsO4)3O2•3(H2O) A2/a 2/m
08.DH.30 Pararobertsite Ca2Mn3(PO4)3O2•3(H2O) P 21/c 2/m
08.DH.30 Kolfanite Ca2Fe3O2(AsO4)3•2(H2O) A2/a 2/m
08.DH.30 Lunokite (Mn,Ca)(Mg,Fe,Mn)Al(PO4)2(OH)•4(H2O) P bca 2/m 2/m 2/m
08.DH.30 Robertsite Ca6Mn9(PO4)9O6(H2O)6•3(H2O) A2/a 2/m
08.DH.30 Mitridatite Ca2Fe3(PO4)3O2•3(H2O) A2/a 2/m
08.DH.30 Sailaufite! Ca2Mn3O2(AsO4)2(CO3)•3(H2O) Cm m

Other Arseniosiderite Information

Help on References: References: NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Arseniosiderite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Franklin Minerals(Dunn)
6 - Franklin Minerals(Palache)
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info

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Dana No: Strunz No: 08.DH.30





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