Mineralogy Database

Ashburtonite Mineral Data

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General Ashburtonite Information

Help on Chemical  Formula: Chemical Formula: HPb4Cu++4Si4O12(HCO3)4(OH)4Cl
Help on Composition: Composition: Molecular Weight = 1,735.88 gm
   Copper    14.64 %  Cu   18.33 % CuO
   Silicon    6.47 %  Si   13.85 % SiO2
   Hydrogen   0.52 %  H     4.67 % H2O
   Lead      47.75 %  Pb   51.43 % PbO
   Carbon     2.77 %  C    10.14 % CO2
   Chlorine   2.04 %  Cl    2.04 % Cl
               -   %   Cl   -0.46 % -O=Cl2   
   Oxygen    25.81 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: HPb4Cu4Si4O12(HCO3)4(OH)4Cl
Help on Environment: Environment: Secondary minerals in a weathered shear zone that cuts a series of shales and graywackes.
Help on IMA Status: IMA Status: Approved IMA 1989
Help on Locality: Locality: Anticline prospect, on Mineral Claim 84, which is on the Ashburton Downs pastoral lease, 11.2 km west-southwest of Ashburton Downs homestead. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Ashburtonite + Pronunciation Say ASHBURTONITE
Help on Synonym: Synonym: ICSD 80794
  PDF 44-1406

Ashburtonite Image

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Comments: Blue-green crystalline crust of ashburtonite on matrix.
Location: Anticline Deposit, Ashburton Downs, Western Australia, Australia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ashburtonite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.42876
Help on Cell Dimensions: Cell Dimensions: a = 14.234, c = 6.103, Z = 2; V = 1,236.51 Den(Calc)= 4.66
Help on Crystal System: Crystal System: Tetragonal - Dipyramidal H-M Symbol (4/m) Space Group: I 4/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.333(1), 4.495(1), 10.2(1),

Physical Properties of Ashburtonite

Help on Cleavage: Cleavage: None
Help on Color: Color: Blue.
Help on Density: Density: 4.69
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: light blue

Optical Properties of Ashburtonite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.017 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.011 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1702,KPDmeas= 0.1691,KC= 0.1721
Ncalc = 1.8 - 1.81
Help on Optical Data: Optical Data: Uniaxial (+), w=1.786, e=1.8, bire=0.0140.

Calculated Properties of Ashburtonite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.16 gm/cc
note: Specific Gravity of Ashburtonite =4.66 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.1
Boson Index = 0.9
Help on Photoelectric: Photoelectric: PEAshburtonite = 829.28 barns/electron
U=PEAshburtonite x rElectron Density=3,446.20 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ashburtonite is Not Radioactive

Ashburtonite Classification

Help on  Dana Class: Dana Class: (78)Unclassified silicates
  (78.04)possible inosilicates
  (78.04.02)Dana Group Ashburtonite HPb4Cu4Si4O12(HCO3)4(OH)4Cl I 4/m 4/m
Help on  Strunz Class: Strunz Class: 09.CF.05 09 - SILICATES (Germanates)
  09.C - Cyclosilicates
  09.CF -[Si4O12]8- 4-membered single rings, with insular complex anions
09.CF.05 Ashburtonite HPb4Cu4Si4O12(HCO3)4(OH)4Cl I 4/m 4/m

Other Ashburtonite Information

Help on References: References: NAME( AmMin, v76:1701) PHYS. PROP.(Am.Min.,Vol.76,p1701-1707,1991) OPTIC PROP.(Am.Min.,Vol.76,p1701-1707,1991)
Help on See Also: See Also: Links to other databases for Ashburtonite :
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: 09.CF.05





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