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Pinalite Mineral Data
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General Pinalite Information
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Chemical Formula: |
Pb3(WO4)OCl2 |
Composition: |
Molecular Weight = 956.35 gm |
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Lead 65.00 % Pb 70.02 % PbO |
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Tungsten 19.22 % W 24.24 % WO3 |
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Chlorine 7.41 % Cl 7.41 % Cl |
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- %
Cl -1.67 % -O=Cl2 |
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Oxygen 8.36 % O |
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______ ______ |
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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. |
Name Pronunciation: |
Pinalite |
Synonym: |
ICSD 89833 |
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PDF 46-1395 |
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Pinalite Image |
Images:
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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 |
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Pinalite Crystallography
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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 - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Amam |
X Ray Diffraction: |
By Intensity(I/Io): 2.926(1), 3.778(0.9), 1.642(0.5), |
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Physical Properties of Pinalite
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Cleavage: |
None |
Color: |
Yellow, Orangish, Golden yellow. |
Diaphaneity: |
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 |
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Optical Properties of Pinalite
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Gladstone-Dale: |
CI calc= -0.211 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1914,KC= 0.158 Ncalc = 2.24 |
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. |
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Calculated Properties of Pinalite
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Electron Density: |
Bulk Density (Electron Density)=6.44 gm/cc note: Specific Gravity of Pinalite =7.82 gm/cc. |
Fermion Index: |
Fermion Index = 0.17 Boson Index = 0.83 |
Photoelectric: |
PEPinalite =1,463.24 barns/electron U=PEPinalite x rElectron Density=9,428.25 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Pinalite is Not Radioactive |
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Pinalite Classification
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Dana Class: |
10.02.09.01 (10)Oxyhalides and Hydroxyhalides |
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(10.02)where A (O,OH) Xq |
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(10.02.09)Dana Group |
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10.02.09.01 Pinalite Pb3(WO4)OCl2 Amam 2/m 2/m 2/m |
Strunz Class: |
03.DC.55 03 - HALIDES |
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03.D - Oxyhalides, Hydroxyhalides and Related Double Halides |
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03.DC -With Pb (As,Sb,Bi), without Cu |
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03.DC.55 Pinalite Pb3(WO4)OCl2 Amam 2/m 2/m 2/m |
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Other Pinalite Information
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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 - 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
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Print or Cut-and-Paste your Pinalite Specimen Label here :
Pinalite
Pb3(WO4)OCl2
Dana No: 10.02.09.01 Strunz No: 03.DC.55
Locality:
Notes:
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