Pinalite Mineral Data

Pinalite Mineral Data +

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General Pinalite Information

Chemical Formula:

Pb3(WO4)OCl2

Composition:

Molecular Weight = 956.35 gm

Lead 65.00 % Pb 70.02 % PbO

Tungsten 19.22 % W 24.24 % WO₃

Chlorine 7.41 % Cl 7.41 % Cl

- % Cl -1.67 % -O=Cl₂

Oxygen 8.36 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Pb₃(WO₄)OCl₂

Environment:

In solution cavities in quartz.

IMA Status:

Approved IMA 1989

Locality:

Mammoth mine, Pinal County, Arizona, USA. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Synonym:

ICSD 89833

PDF 46-1395

Pinalite Image

Images:

Pinalite

Comments: Yellow needles of pinalite from 0.2 to 0.5mm in rose quartz and blue caledonite.
Location: Tiger, Pinal County, Arizona, USA. Scale: Picture size 5 mm.
© Tom Loomis / Dakota Matrix

Pinalite Crystallography

Axial Ratios:

a:b:c =0.8474:1:0.4298

Cell Dimensions:

a = 11.073, b = 13.067, c = 5.617, Z = 4; V = 812.73 Den(Calc)= 7.82

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Amam

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

By Intensity(I/I_o): 2.926(1), 3.778(0.9), 1.642(0.5),

Crystal Structure:

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Grice J D , Dunn P J , American Mineralogist , 85 (2000) p.806-809, Crystal-structure determination of pinalite

Physical Properties of Pinalite

Cleavage:

None

Color:

Yellow, Orangish, Golden yellow.

Diaphaniety:

Transparent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Bladed - Aggregates of thin lath-like crystals (e.g. kyanite).

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Luminescence:

Non-fluorescent.

Luster:

Adamantine

Optical Properties of Pinalite

Gladstone-Dale:

CI calc= -0.211 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1914,KC= 0.158

Optical Data:

Biaxial (+), a=2.49, b=2.495, g=2.505, bire=0.0150, 2V(Calc)=72, 2V(Meas)=70-70.5. Dispersion r > v moderate.

Pleochroism (x):

none.

Pleochroism (y):

none.

Pleochroism (z):

none.

Calculated Properties of Pinalite

Electron Density:

r_electron=6.44 gm/cc
note: r_Pinalite=7.82 gm/cc.

Fermion Index

Fermion Index = 0.17113
Boson Index = 0.82887

Photoelectric:

PE_Pinalite=1,463.24 barns/electron
U=PE_Pinalite x r_electron=9,428.25 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Pinalite is Not Radioactive

Pinalite Classification

Dana Class:

10.2.9.1 (10)Oxyhalides and Hydroxyhalides

(10.2)where A (O,OH) Xq

(10.2.9)Dana Group

10.2.9.1 Pinalite Pb3(WO4)OCl2 Amam 2/m 2/m 2/m

Strunz Class:

III/D.11-70 III - Halogenides

III/D - Oxi-halogenides with Pb - Bi - Sb and related compounds

III/D.11 - Mendipite - Onoratoite series

III/D.11-10 Mendipite Pb3Cl2O2 P 2₁2₁2₁ 2 2 2

III/D.11-15 Damaraite Pb3O2(OH)Cl Pmc2 mm2

III/D.11-17 Chubutite* Pb7O6Cl2 Unk Ortho

III/D.11-20 Penfieldite Pb2Cl3(OH) P 6/mmm 6/m 2/m 2/m

III/D.11-30 Blixite Pb2Cl(O,OH)2 Unk Ortho

III/D.11-35 Mereheadite! Pb2O(OH)Cl C 2/c 2/m

III/D.11-40 Sundiusite Pb10(SO4)Cl2O8 C 2,Cm,C 2/m Mono

III/D.11-50 Asisite Pb12(SiO4)O8Cl4 I 4/mmm 4/m 2/m 2/m

III/D.11-55 Parkinsonite (Pb,Mo,[])8O8Cl2 I 4/mmm 4/m 2/m 2/m

III/D.11-60 Thorikosite Pb3(Sb,As)O3(OH)Cl2 I 4/mmm 4/m 2/m 2/m

III/D.11-65 Philolithite! Pb12O6Mn(Mg,Mn)2(Mn,Mg)4(SO4)(CO3)4Cl4(OH)12 P 4₁/nnm 4/m 2/m 2/m

III/D.11-70 Pinalite Pb3(WO4)OCl2 Amam 2/m 2/m 2/m

III/D.11-80 Nadorite PbSbO2Cl Bmmb 2/m 2/m 2/m

III/D.11-90 Perite PbBiO2Cl Bmmb 2/m 2/m 2/m

III/D.11-100 Heliophyllite Pb6As2O7Cl4 Unk Ortho

III/D.11-110 Ecdemite Pb6As2O7Cl4 Unk Tetra

III/D.11-120 Onoratoite Sb8O11Cl2 C 2/m 2/m

Other Pinalite Information

References:

NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.74,p934-935,1989) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Pinalite :
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 -École des Mines de Paris

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

Pinalite

Pb3(WO4)OCl2
Dana No: 10.2.9.1 Strunz No: III/D.11-70
Locality:

Notes: