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Schmiederite Mineral Data

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General Schmiederite Information

Help on Chemical  Formula: Chemical Formula: Pb2Cu++2(Se++++O3)(Se++++++O4)(OH)4
Help on Composition: Composition: Molecular Weight = 879.44 gm
   Copper    14.45 %  Cu   18.09 % CuO
   Hydrogen   0.46 %  H     4.10 % H2O
   Lead      47.12 %  Pb   50.76 % PbO
   Selenium  17.96 %  Se   12.62 % SeO2 / 14.44 % SeO3
   Oxygen    20.01 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb2Cu2(SeO3)(SeO4)(OH)4
Help on Environment: Environment: Secondary mineral in the oxidized zone of selenium-bearing hydrothermal base metal deposits.
Help on IMA Status: IMA Status: Approved IMA 1962
Help on Locality: Locality: C�ondor mine, Los Llantenes district, Sierra de Cacheuta, La Rioja Province, Argentina. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Oscar Schmieder (1891-1980), German geographer, a Director of the Museum of Mineralogy and Geology, National University, C�ordoba, Argentina.
Help on Name Pronunciation: Name Pronunciation: Schmiederite + Pronunciation Say SCHMIEDERITE
Help on Synonym: Synonym: ICSD 68172
  PDF 41-1377

Schmiederite Image

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Comments: Acicular schmiederite micro crystals in quartz.
Location: Condor Mine, La Rioja, Argentina. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Schmiederite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.737:1:1.6449
Help on Cell Dimensions: Cell Dimensions: a = 9.922, b = 5.712, c = 9.396, Z = 2; beta = 101.96° V = 520.95 Den(Calc)= 5.61
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/m

Physical Properties of Schmiederite

Help on Color: Color: Blue.
Help on Density: Density: 5.6
Help on Streak: Streak: light blue

Optical Properties of Schmiederite

Help on Optical Data: Optical Data: NCalc= 1.9 - from Gladstone-Dale relationship (KC = 0.1605) where Ncalc=Dcalc*KC+1
NCalc= 1.9 - from Gladstone-Dale relationship (KC = 0.1605) where Ncalc=Dmeas*KC+1

Calculated Properties of Schmiederite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.87 gm/cc
note: Specific Gravity of Schmiederite =5.61 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.11
Boson Index = 0.89
Help on Photoelectric: Photoelectric: PESchmiederite = 854.22 barns/electron
U=PESchmiederite x rElectron Density=4,163.15 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Schmiederite is Not Radioactive

Schmiederite Classification

Help on  Dana Class: Dana Class: (33)Selenates and Tellurates
  (33.01)as A+ (B++)m XO4 Zq
  (33.01.01)Schmiederite Series Schmiederite Pb2Cu2(SeO3)(SeO4)(OH)4 P 21/m 2/m Munakataite! Pb2Cu2(SeO3)(SO4)(OH)4 P 21/m 2/m
Help on  Strunz Class: Strunz Class: 07.BC.65 07 - SULFATES (SELENATES, TELLURATES)
  07.B - Sulfates (selenates, etc.) with Additional Anions, without H2O
  07.BC -With medium-sized and large cations
07.BC.65 Linarite PbCu(SO4)(OH)2 P 21/m 2/m
07.BC.65 Schmiederite Pb2Cu2(SeO3)(SeO4)(OH)4 P 21/m 2/m
07.BC.65 Munakataite! Pb2Cu2(SeO3)(SO4)(OH)4 P 21/m 2/m

Other Schmiederite Information

Help on References: References: NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Schmiederite :
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.BC.65





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