Schmiederite Mineral Data

Schmiederite Mineral Data +

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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

IMA Status:

Approved IMA 1962

Locality:

Link to MinDat.org Location Data.

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 - PrismaticH-M Symbol (2/m) Space Group: P 2₁/m

Crystal Structure:

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Effenberger H , Mineralogy and Petrology , 36 (1987) p.3-12, Crystal structure and chemical formula of schmiederite, Pb2Cu2(OH)4(SeO3)(SeO4),, with a comparison to linarite PbCu(OH)2(SO4), Locality: synthetic

Physical Properties of Schmiederite

Color:

Blue.

Density:

5.6

Streak:

light blue

Calculated Properties of Schmiederite

Electron Density:

r_electron=4.87 gm/cc
note: r_Schmiederite=5.61 gm/cc.

Fermion Index

Fermion Index = 0.11788
Boson Index = 0.88212

Photoelectric:

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

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Schmiederite is Not Radioactive

Schmiederite Classification

Dana Class:

33.1.1.1 (33)Selenates and Tellurates

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

(33.1.1)Dana Group

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

Strunz Class:

VI/B.10-20 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/B - Waterfree sulfates [SO4]2- with unfamiliar anions. cations of medium size

VI/B.10 - Linarite - Mammothite series

VI/B.10-10 Linarite PbCu(SO4)(OH)2 P 2₁/m 2/m

VI/B.10-20 Schmiederite Pb2Cu2(SeO3)(SeO4)(OH)4 P 2₁/m 2/m

VI/B.10-30 Chenite Pb4Cu(SO4)2(OH)6 P1 1

VI/B.10-40 Elyite Pb4Cu(SO4)O2(OH)4·(H2O) P 2₁/c 2/m

VI/B.10-50 Mammothite Pb6Cu4AlSbO2(SO4)2Cl4(OH)16 C 2/m 2/m

Other Schmiederite Information

References:

NAME( Athena) 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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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Schmiederite

Pb2Cu++2(Se++++O3)(Se++++++O4)(OH)4
Dana No: 33.1.1.1 Strunz No: VI/B.10-20
Locality:

Notes: