Mineralogy Database

Bismoclite Mineral Data

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General Bismoclite Information

Help on Chemical  Formula: Chemical Formula: BiOCl
Help on Composition: Composition: Molecular Weight = 260.43 gm
   Bismuth   80.24 %  Bi   89.46 % Bi2O3
   Chlorine  13.61 %  Cl   13.61 % Cl
               -   %   Cl   -3.07 % -O=Cl2   
   Oxygen     6.14 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: BiOCl
Help on Environment: Environment: In an alluvial specimen, found near bismuth-bearing granite pegmatites.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1935
Help on Locality: Locality: In South Africa, about 25 km northwest of Jackals Water, near Steinkoph, Cape Province. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: In allusion to its composition, a "bismuth oxychloride."
Help on Name Pronunciation: Name Pronunciation: Bismoclite + Pronunciation Say BISMOCLITE
Help on Synonym: Synonym: ICSD 74502
  PDF 6-249

Bismoclite Image

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Comments: Opaque white pearly crystalline bismoclite on matrix.
Location: Falcacci Mine, Rio Marina, Elba, Italy. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Bismoclite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.89209
Help on Cell Dimensions: Cell Dimensions: a = 3.883, c = 7.347, Z = 2; V = 110.78 Den(Calc)= 7.81
Help on Crystal System: Crystal System: Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: P 4/nmm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.44(1), 2.677(0.95), 2.753(0.75),

Physical Properties of Bismoclite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Brown, Colorless, Gray, Yellow, Yellow brown.
Help on Density: Density: 7.717
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Hardness: Hardness: 2-2.5 - Gypsum-Finger Nail
Help on Luster: Luster: Greasy (Oily)
Help on Streak: Streak: white

Optical Properties of Bismoclite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.258 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.267 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1319,KPDmeas= 0.1335,KC= 0.1799
Ncalc = 2.39 - 2.4
Help on Optical Data: Optical Data: Uniaxial (-), e=1.91, w=2.15, bire=0.2400.

Calculated Properties of Bismoclite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.40 gm/cc
note: Specific Gravity of Bismoclite =7.72 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0000302907
Boson Index = 0.9999697093
Help on Photoelectric: Photoelectric: PEBismoclite =1,558.04 barns/electron
U=PEBismoclite x rElectron Density=9,972.10 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Bismoclite is Not Radioactive

Bismoclite Classification

Help on  Dana Class: Dana Class: (10)Oxyhalides and Hydroxyhalides
  (10.02)where A (O,OH) Xq
  (10.02.01)Bismoclite Group Zavaritskite BiOF P 4/nmm 4/m 2/m 2/m Bismoclite BiOCl P 4/nmm 4/m 2/m 2/m Daubreeite BiO(OH,Cl) P 4/nmm 4/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 03.DC.25 03 - HALIDES
  03.D - Oxyhalides, Hydroxyhalides and Related Double Halides
  03.DC -With Pb (As,Sb,Bi), without Cu
03.DC.25 Bismoclite BiOCl P 4/nmm 4/m 2/m 2/m
03.DC.25 Daubreeite BiO(OH,Cl) P 4/nmm 4/m 2/m 2/m
03.DC.25 Matlockite PbFCl P 4/nmm 4/m 2/m 2/m
03.DC.25 Rorisite (Ca,Mg)FCl P 4/nmm 4/m 2/m 2/m
03.DC.25 Zavaritskite BiOF P 4/nmm 4/m 2/m 2/m
03.DC.25 Zhangpeishanite! BaFCl P 4/mmm 4mm

Other Bismoclite Information

Help on References: References: NAME( AntBidBlaNic3) 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 Bismoclite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 03.DC.25





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