Schmiederite Mineral Data

General Schmiederite Information

Chemical Formula:

Pb2Cu++2(Se++++O3)(Se++++++O4)(OH)4

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

Empirical Formula:

Pb₂Cu₂(SeO₃)(SeO₄)(OH)₄

Environment:

Secondary mineral in the oxidized zone of selenium-bearing hydrothermal base metal deposits.

IMA Status:

Approved IMA 1962

Locality:

C�ondor mine, Los Llantenes district, Sierra de Cacheuta, La Rioja Province, Argentina. Link to MinDat.org Location Data.

Name Origin:

Named for Oscar Schmieder (1891-1980), German geographer, a Director of the Museum of Mineralogy and Geology, National University, C�ordoba, Argentina.

Name Pronunciation:

Schmiederite + Pronunciation

Synonym:

ICSD 68172

PDF 41-1377

Schmeiderite

Schmiederite Image

Images:

Schmiederite

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

Axial Ratios:

a:b:c =1.737:1:1.6449

Cell Dimensions:

a = 9.922, b = 5.712, c = 9.396, Z = 2; beta = 101.96° V = 520.95 Den(Calc)= 5.61

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2₁/m

Physical Properties of Schmiederite

Color:

Blue.

Density:

5.6

Streak:

light blue

Optical Properties of Schmiederite

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

Electron Density:

Bulk Density (Electron Density)=4.87 gm/cc
note: Specific Gravity of Schmiederite =5.61 gm/cc.

Fermion Index:

Fermion Index = 0.11
Boson Index = 0.89

Photoelectric:

PE_Schmiederite= 854.22 barns/electron
U=PE_Schmiederite x rElectron Density=4,163.15 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Schmiederite is Not Radioactive

Schmiederite Classification

Dana Class:

33.01.01.01 (33)Selenates and Tellurates

(33.01)as A+ (B++)m XO4 Zq

(33.01.01)Schmiederite Series

33.01.01.01 Schmiederite Pb2Cu2(SeO3)(SeO4)(OH)4 P 2₁/m 2/m

33.01.01.02 Munakataite! Pb2Cu2(SeO3)(SO4)(OH)4 P 2₁/m 2/m

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

References:

NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)

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
15 - WWW-MINCRYST

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Print or Cut-and-Paste your Schmiederite Specimen Label here :

Schmiederite

Pb2Cu++2(Se++++O3)(Se++++++O4)(OH)4
Dana No: 33.01.01.01 Strunz No: 07.BC.65
Locality:

Notes:

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