Gilmarite Mineral Data

Gilmarite Mineral Data
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General Gilmarite Information

Help on Chemical Formula: Chemical Formula: Cu3(AsO4)(OH)3
Help on Composition: Composition: Molecular Weight = 380.58 gm
   Copper    50.09 %  Cu   62.70 % CuO
   Arsenic   19.69 %  As   30.20 % As2O5
   Hydrogen   0.79 %  H     7.10 % H2O
   Oxygen    29.43 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Cu3(AsO4)(OH)3
Help on Environment: Environment: Small geodes in narrow carbonate veins. A triclinic polymorph of clinoclase.
Help on IMA Status: IMA Status: Approved IMA 1999 (Dana # Added)
Help on Locality: Locality: Roua deposit, Guillaumes municipality, about 50 km from Nice, France. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Gilbert Mari (1944-), mineralogist at the University of Nice-Sophia Antipolis, France.
Help on Synonym: Synonym: ICSD 87869
  IMA1996-017
 

Gilmarite Image

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Gilmarite

Comments: Scanning electron image of prismatic gilmarite crystals (Eur. J. Mineral, 11:549).
Location: Roua deposit, Guillaumes municipality, about 50 km from Nice, France. Scale: Picture size 80 µm.
© Eur. J. Mineral

Gilmarite Crystallography
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 4.613(1), 3.39(0.6), 4.58(0.5),2.543(0.4), 2.714(0.4), 2.445(0.3),
Click Here for Large Gilmarite Structure Window Crystal Structure:

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Sarp H , Cerny R , European Journal of Mineralogy , 11 (1999) p.549-555, Gilmarite, Cu3(AsO4)(OH)3, a new mineral:, its description and crystal structure

 

Physical Properties of Gilmarite

Help on Color: Color: Greenish blue.
 

Optical Properties of Gilmarite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.056 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.034 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1857,KPDmeas= 0.1897,KC= 0.1797
Ncalc = 1.75 - 1.77
 

Calculated Properties of Gilmarite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.04 gm/cc
note: Specific Gravity of Gilmarite =4.29 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0001424449
Boson Index = 0.9998575551
Help on Photoelectric: Photoelectric: PEGilmarite = 35.98 barns/electron
U=PEGilmarite x rElectron Density= 145.22 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Gilmarite is Not Radioactive
 

Gilmarite Classification
Help on Dana Class: Dana Class: 41.03.01.02 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.03)where (A B)3 (XO4) Zq
  (41.03.01)Clinoclase Group
 
41.03.01.01 Clinoclase Cu3(AsO4)(OH)3 P 21/a 2/m
 
41.03.01.02 Gilmarite! Cu3(AsO4)(OH)3 P1 1
 
41.03.01.03 Lapeyreite! Cu3O[AsO3(OH)]2•H2O C 2/m 2/m
Help on Strunz Class: Strunz Class: 08.BE.25 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BE -With only medium-sized cations, (OH, etc.):RO4 > 2:1
 
08.BE.25 Arhbarite Cu2Mg(AsO4)(OH)3 P1 1
 
08.BE.25 Gilmarite! Cu3(AsO4)(OH)3 P1 1
 

Other Gilmarite Information
Help on See Also: See Also: Links to other databases for Gilmarite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Ask about Gilmarite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
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Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espaņol

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

Gilmarite

Cu3(AsO4)(OH)3
Dana No: 41.03.01.02 Strunz No: 08.BE.25
Locality:

 

Notes: