Mineralogy Database

Olsacherite Mineral Data

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General Olsacherite Information

Help on Chemical  Formula: Chemical Formula: Pb2(SeO4)(SO4)
Help on Composition: Composition: Molecular Weight = 653.42 gm
   Lead      63.42 %  Pb   68.32 % PbO
   Selenium  12.08 %  Se   19.43 % SeO3
   Sulfur     4.91 %  S    12.25 % SO3
   Oxygen    19.59 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb2(SeO4)(SO4)
Help on Environment: Environment: Oxidation product of penroseite.
Help on IMA Status: IMA Status: Approved IMA 1969
Help on Locality: Locality: Pacajake mine, Hiaco, Bolivia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Juan A. Olsacher (1903-1964), Argentine mineralogist, University of Cordoba.
Help on Name Pronunciation: Name Pronunciation: Olsacherite + Pronunciation Say OLSACHERITE
Help on Synonym: Synonym: Kerstenite

Olsacherite Image

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Comments: Light yellow crystals of olsacherite up to 2 mm in matrix.
Location: Colquechaca, Potosí, Bolivia. Scale: Picture size 1.5 cm.
© John Veevaert

Olsacherite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.7682:1:0.6386
Help on Cell Dimensions: Cell Dimensions: a = 8.42, b = 10.96, c = 7, Z = 4; V = 645.98 Den(Calc)= 6.72
Help on Crystal System: Crystal System: Orthorhombic - Disphenoidal H-M Symbol (2 2 2) Space Group: P 2212
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.015(1), 3.234(1), 3.338(1),
Help on Forms: Forms:

Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

Forms: ( 1 1 1) ( 1 0 1) ( 1 1 1)

Warning: this java applet does not work in some browsers because of security restrictions.


Physical Properties of Olsacherite

Help on Cleavage: Cleavage: {101} Good, {010} Fair
Help on Color: Color: Colorless.
Help on Density: Density: 6.55
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Hardness: Hardness: 3-3.5 - Calcite-Copper Penny
Help on Luster: Luster: Vitreous - Dull
Help on Streak: Streak: white

Optical Properties of Olsacherite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.016 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.009 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1431,KPDmeas= 0.1468,KC= 0.1444
Ncalc = 1.95 - 1.97
Help on Optical Data: Optical Data: Biaxial (-), a=1.935, b=1.966, g=1.983, bire=0.0480, 2V(Calc)=72, 2V(Meas)=80.

Calculated Properties of Olsacherite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.72 gm/cc
note: Specific Gravity of Olsacherite =6.72 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.14
Boson Index = 0.86
Help on Photoelectric: Photoelectric: PEOlsacherite =1,154.50 barns/electron
U=PEOlsacherite x rElectron Density=6,601.51 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Olsacherite is Not Radioactive

Olsacherite Classification

Help on  Dana Class: Dana Class: (32)Compound Sulfates
  (32.01)(anhydrous) with simple bi-anionic formula
  (32.01.03)Dana Group Olsacherite Pb2(SeO4)(SO4) P 2212 2 2 2
Help on  Strunz Class: Strunz Class: 07.AD.35 07 - SULFATES (SELENATES, TELLURATES)
  07.A - Sulfates (selenates, etc.) without Additional Anions, without H2O
  07.AD -With only large cations
07.AD.35 Anglesite PbSO4 Pbnm 2/m 2/m 2/m
07.AD.35 Barite BaSO4 Pbnm 2/m 2/m 2/m
07.AD.35 Celestine SrSO4 Pbnm 2/m 2/m 2/m
07.AD.35 Olsacherite Pb2(SeO4)(SO4) P 2212 2 2 2
07.AD.35 Radiobarite* (Ba,Ra)SO4 2/m 2/m 2/m

Other Olsacherite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Olsacherite :
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: 07.AD.35





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