Mineralogy Database

Pinalite Mineral Data

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General Pinalite Information

Help on Chemical  Formula: Chemical Formula: Pb3(WO4)OCl2
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: Pb3(WO4)OCl2
Help on Environment: Environment: In solution cavities in quartz.
Help on IMA Status: IMA Status: Approved IMA 1989
Help on Locality: Locality: Mammoth mine, Pinal County, Arizona, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Pinalite Say PINALITE
Help on Synonym: Synonym: ICSD 89833
  PDF 46-1395

Pinalite Image

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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

Help on Axial Ratios: Axial Ratios: a:b:c =0.8474:1:0.4298
Help on Cell Dimensions: Cell Dimensions: a = 11.073, b = 13.067, c = 5.617, Z = 4; V = 812.73 Den(Calc)= 7.82
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Amam
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.926(1), 3.778(0.9), 1.642(0.5),

Physical Properties of Pinalite

Help on Cleavage: Cleavage: None
Help on Color: Color: Yellow, Orangish, Golden yellow.
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Bladed - Aggregates of thin lath-like crystals (e.g. kyanite).
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Adamantine

Optical Properties of Pinalite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= -0.211 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1914,KC= 0.158
Ncalc = 2.24
Help on Optical Data: 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.
Help on Pleochroism (x): Pleochroism (x): none.
Help on Pleochroism (y): Pleochroism (y): none.
Help on Pleochroism (z): Pleochroism (z): none.

Calculated Properties of Pinalite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.44 gm/cc
note: Specific Gravity of Pinalite =7.82 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.17
Boson Index = 0.83
Help on Photoelectric: Photoelectric: PEPinalite =1,463.24 barns/electron
U=PEPinalite x rElectron Density=9,428.25 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Pinalite is Not Radioactive

Pinalite Classification

Help on  Dana Class: Dana Class: (10)Oxyhalides and Hydroxyhalides
  (10.02)where A (O,OH) Xq
  (10.02.09)Dana Group Pinalite Pb3(WO4)OCl2 Amam 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 03.DC.55 03 - HALIDES
  03.D - Oxyhalides, Hydroxyhalides and Related Double Halides
  03.DC -With Pb (As,Sb,Bi), without Cu
03.DC.55 Pinalite Pb3(WO4)OCl2 Amam 2/m 2/m 2/m

Other Pinalite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.74,p934-935,1989) OPTIC PROP.(Dana8)
Help on See Also: 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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Dana No: Strunz No: 03.DC.55





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