Wroewolfeite Mineral Data

General Wroewolfeite Information

Chemical Formula:

Cu4(SO4)(OH)6•2(H2O)

Composition:

Molecular Weight = 488.32 gm

Copper 52.05 % Cu 65.16 % CuO

Hydrogen 2.06 % H 18.45 % H₂O

Sulfur 6.57 % S 16.40 % SO₃

Oxygen 39.32 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Cu₄(SO₄)(OH)₆•2(H₂O)

Environment:

Oxidation zone of an old lead mine.

IMA Status:

Approved IMA 1975

Locality:

Loudville, Maryland, USA. Link to MinDat.org Location Data.

Name Origin:

Named for Caleb Wroe Wolfe (1908-1980), crystallographer, Boston University.

Name Pronunciation:

Wroewolfeite + Pronunciation

Synonym:

ICSD 40091

PDF 27-1133

Wroewolfeite Image

Images:

Wroewolfeite

Comments: Blue, lath-shaped crystals of wroewolfeite on matrix.
Location: Lichtenberg Mine, Ronneburg U Deposit, Gera district, Thuringia, Germany. Scale: Picture size 1.5 mm.
© Thomas Witzke / Abraxas-Verlag

Wroewolfeite Crystallography

Axial Ratios:

a:b:c =0.9101:1:2.1574

Cell Dimensions:

a = 6.058, b = 6.656, c = 14.36, Z = 2; beta = 93.467° V = 577.96 Den(Calc)= 2.81

Crystal System:

Monoclinic - Domatic H-M Symbol (m) Space Group: Pc

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 7.15(1), 3.581(0.7), 2.628(0.35),

Physical Properties of Wroewolfeite

Cleavage:

{010} Perfect, {100} Perfect, {001} Perfect

Color:

Greenish blue, Dark greenish blue.

Density:

3.27

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Hardness:

2.5 - Finger Nail

Luster:

Vitreous (Glassy)

Streak:

light blue

Optical Properties of Wroewolfeite

Gladstone-Dale:

CI meas= -0.013 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.179 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2388,KPDmeas= 0.2052,KC= 0.2025
Ncalc = 1.57 - 1.66

Optical Data:

Biaxial (-), a=1.637, b=1.682, g=1.694, bire=0.0570, 2V(Calc)=52, 2V(Meas)=53.

Pleochroism (x):

light blue.

Pleochroism (y):

deep greenish blue.

Pleochroism (z):

greenish blue.

Calculated Properties of Wroewolfeite

Electron Density:

Bulk Density (Electron Density)=3.19 gm/cc
note: Specific Gravity of Wroewolfeite =3.27 gm/cc.

Fermion Index:

Fermion Index = 0.0006843094
Boson Index = 0.9993156906

Photoelectric:

PE_Wroewolfeite= 22.95 barns/electron
U=PE_Wroewolfeite x rElectron Density= 73.16 barns/cc.

Radioactivity:

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

Wroewolfeite Classification

Dana Class:

31.04.02.01 (31)Hydrated Sulfates Containing Hydroxyl or Halogen

(31.04)where (A+ B++)4 (XO4) Zqï¿½x(H2O)

(31.04.02)Dana Group

31.04.02.01 Wroewolfeite Cu4(SO4)(OH)6•2(H2O) Pc m

Strunz Class:

07.DD.10 07 - SULFATES (SELENATES, TELLURATES)

07.D - Sulfates (selenates, etc.) with additional anions, with H2O

07.DD -With only medium-sized cations; sheets of edge-sharing octahedra

07.DD.10 Langite Cu4(SO4)(OH)6•2(H2O) Pc m

07.DD.10 Posnjakite Cu4(SO4)(OH)6•(H2O) C 2/c 2/m

07.DD.10 Wroewolfeite Cu4(SO4)(OH)6•2(H2O) Pc m

Other Wroewolfeite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Wroewolfeite :
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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Wroewolfeite

Cu4(SO4)(OH)6•2(H2O)
Dana No: 31.04.02.01 Strunz No: 07.DD.10
Locality:

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