Osarizawaite Mineral Data

Osarizawaite Mineral Data +

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General Osarizawaite Information

Chemical Formula:

PbCuAl2(SO4)2(OH)6

Composition:

Molecular Weight = 618.88 gm

Aluminum 8.72 % Al 16.48 % Al₂O₃

Copper 10.27 % Cu 11.56 % Cu₂O

Hydrogen 0.98 % H 8.73 % H₂O

Lead 33.48 % Pb 36.07 % PbO

Sulfur 10.36 % S 25.87 % SO₃

Oxygen 36.19 % O

______ ______

100.00 % 98.71 % = TOTAL OXIDE

Empirical Formula:

PbCuAl₂(SO₄)₂(OH)₆

Environment:

Secondary mineral. Aluminum analog of beaverite.

IMA Status:

Approved IMA 1961

Locality:

Osarizawa mine, Akita Prefecture, Japan. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Synonym:

ICSD 100441

PDF 15-178

Osarizawaite Image

Images:

Osarizawaite

Comments: Light blue micro crystals of osarizawaite and minor azurite filling vugs.
Location: Silver Hill Mine, near Marana, Pinal Co. Arizona, USA. Scale: 3 x 2 cm.
© John Veevaert

Osarizawaite Crystallography

Axial Ratios:

a:c = 1:2.4468

Cell Dimensions:

a = 7.05, c = 17.25, Z = 3; V = 742.50 Den(Calc)= 4.15

Crystal System:

Trigonal - Ditrigonal PyramidalH-M Symbol (3m) Space Group: R 3m

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

By Intensity(I/I_o): 3(1), 5.75(0.7), 3.52(0.6),

Physical Properties of Osarizawaite

Color:

Green.

Density:

4.037

Diaphaniety:

Transparent to Translucent

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Hardness:

3-4 - Calcite-Fluorite

Luster:

Earthy (Dull)

Streak:

light green

Optical Properties of Osarizawaite

Gladstone-Dale:

CI meas= 0.031 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.057 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1741,KPDmeas= 0.179,KC= 0.1846

Optical Data:

Uniaxial (+), w=1.714, e=1.731, bire=0.0170.

Calculated Properties of Osarizawaite

Electron Density:

r_electron=3.74 gm/cc
note: r_Osarizawaite=4.04 gm/cc.

Fermion Index

Fermion Index = 0.07494
Boson Index = 0.92506

Photoelectric:

PE_Osarizawaite= 559.77 barns/electron
U=PE_Osarizawaite x r_electron=2,095.92 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Osarizawaite is Not Radioactive

Osarizawaite Classification

Dana Class:

30.2.4.4 (30)Anhydrous Sulfates Containing Hydroxyl or Halogen

(30.2)where (A B)2 XO4 Zq

(30.2.4)Alunite Group (Alunite Subgroup)

30.2.4.1 Alunite KAl3(SO4)2(OH)6 R 3m, R 3m Trig

30.2.4.2 Natroalunite NaAl3(SO4)2(OH)6 R 3m 3 2/m

30.2.4.3 Schlossmacherite (H3O,Ca)Al3(AsO4,SO4)2(OH)6 R 3m 3 2/m

30.2.4.4 Osarizawaite PbCuAl2(SO4)2(OH)6 R 3m 3m

30.2.4.5 Minamiite (Na,Ca,K)Al3(SO4)2(OH)6 R 3m 3 2/m

30.2.4.6 Ammonioalunite (NH4)Al3(SO4)2(OH)6 R 3m 3 2/m

30.2.4.7 Walthierite Ba0.5Al3(SO4)2(OH)6 R 3m 3 2/m

30.2.4.8 Huangite Ca0.5Al3(SO4)2(OH)6 R 3m 3 2/m

Strunz Class:

VI/B.11-110 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/B - Waterfree sulfates [SO4]2- with unfamiliar anions. mostly big cations

VI/B.11 - Alunite group, Natroalunite - Jarosite - Beaverite

VI/B.11-10 Natroalunite NaAl3(SO4)2(OH)6 R 3m 3 2/m

VI/B.11-20 Alunite KAl3(SO4)2(OH)6 R 3m, R 3m Trig

VI/B.11-30 Ammonioalunite (NH4)Al3(SO4)2(OH)6 R 3m 3 2/m

VI/B.11-40 Minamiite (Na,Ca,K)Al3(SO4)2(OH)6 R 3m 3 2/m

VI/B.11-43 Huangite Ca0.5Al3(SO4)2(OH)6 R 3m 3 2/m

VI/B.11-45 Walthierite Ba0.5Al3(SO4)2(OH)6 R 3m 3 2/m

VI/B.11-50 Natrojarosite NaFe3(SO4)2(OH)6 R 3m 3m

VI/B.11-60 Jarosite KFe3(SO4)2(OH)6 R 3 3

VI/B.11-65 Dorallcharite (Tl,K)Fe3(SO4)2(OH)6 R 3m 3 2/m

VI/B.11-70 Ammoniojarosite (NH4)Fe3(SO4)2(OH)6 R 3m 3m

VI/B.11-80 Hydronium-jarosite (H3O)Fe3(SO4)2(OH)6 R 3m 3m

VI/B.11-90 Argentojarosite AgFe3(SO4)2(OH)6 R 3m 3m

VI/B.11-100 Plumbojarosite PbFe6(SO4)4(OH)12 R 3m 3 2/m

VI/B.11-110 Osarizawaite PbCuAl2(SO4)2(OH)6 R 3m 3m

VI/B.11-120 Beaverite PbCu(Fe,Al)2(SO4)2(OH)6 R 3m 3m

Other Osarizawaite Information

References:

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

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Osarizawaite

PbCuAl2(SO4)2(OH)6
Dana No: 30.2.4.4 Strunz No: VI/B.11-110
Locality:

Notes: