Phaunouxite Mineral Data

Phaunouxite Mineral Data
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General Phaunouxite Information

Help on Chemical Formula: Chemical Formula: Ca3(AsO4)•11(H2O)
Help on Composition: Composition: Molecular Weight = 596.24 gm
   Calcium   20.17 %  Ca   28.22 % CaO
   Arsenic   25.13 %  As   38.55 % As2O5
   Hydrogen   3.72 %  H    33.24 % H2O
   Oxygen    50.98 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca3(AsO4)2•11(H2O)
Help on Environment: Environment: Rare post-mine low-temperature reaction product of carbonate gangue with arsenical solutions
Help on IMA Status: IMA Status: Approved IMA 1982
Help on Locality: Locality: Gabe-Gottes mine, Rauenthal, near Sainte-Marie-aux-Mines, Haut-Rhin, France. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named from Phaunoux, the French name for the Rauenthal Valley, France, within which the mineral was first found.
Help on Name Pronunciation: Name Pronunciation: Phaunouxite + Pronunciation Say PHAUNOUXITE
Help on Synonym: Synonym: ICSD 36046
  PDF 41-581
 

Phaunouxite Image

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Phaunouxite

Comments: Aggregate of transparent colorless acicular phaunouxite microcrystals.
Location: Grube Gabe Gottes, Sainte-Marie-aux-Mines, Alsace, Haute-Rhin, France. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Phaunouxite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1.0313:1:0.5093
Help on Cell Dimensions: Cell Dimensions: a = 12.563, b = 12.181, c = 6.205, Z = 2; alpha = 88.94°, beta = 91.67°, gamma = 113.44° V = 870.67 Den(Calc)= 2.27
Help on Crystal System: Crystal System: Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 11.49(1), 3.27(0.9), 6.23(0.9),
Click Here for Large Phaunouxite Structure Window Crystal Structure:

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Catti M , Ivaldi G , Acta Crystallographica, Section B , 39 (1983) p.4-10, On the topotactic dehydration Ca3(AsO4)2*11H2O (phaunouxite) ->, Ca3(AsO4)2*10H2O (rauenthalite), and the structures of both minerals, Locality: Sainte Marie-aux-Mines, Alsace, France

 

Physical Properties of Phaunouxite

Help on Color: Color: Colorless.
Help on Density: Density: 2.28
Help on Diaphaneity: Diaphaneity: Transparent
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Phaunouxite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.015 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.02 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2394,KPDmeas= 0.2383,KC= 0.2347
Ncalc = 1.53 - 1.54
Help on Optical Data: Optical Data: Biaxial (+), a=1.532, b=1.542, g=1.556, bire=0.0240, 2V(Calc)=82, 2V(Meas)=80.
 

Calculated Properties of Phaunouxite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.29 gm/cc
note: Specific Gravity of Phaunouxite =2.28 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0005225352
Boson Index = 0.9994774648
Help on Photoelectric: Photoelectric: PEPhaunouxite = 18.75 barns/electron
U=PEPhaunouxite x rElectron Density= 43.01 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Phaunouxite is Not Radioactive
 

Phaunouxite Classification
Help on Dana Class: Dana Class: 40.03.12.01 (40)Hydrated Phosphates, etc
  (40.03)where (A++)3 (XO4)2 · x(H2O)
  (40.03.12)Dana Group
 
40.03.12.01 Phaunouxite Ca3(AsO4)•11(H2O) P1 1
 
40.03.12.02 Cattiite! Mg3(PO4)2•22(H2O) P1 1
Help on Strunz Class: Strunz Class: 08.CJ.40 08 - PHOSPHATES, ARSENATES, VANADATES
  08.C - Phosphates without Additional Anions, with H2O
  08.CJ -With only large cations
 
08.CJ.40 Phaunouxite Ca3(AsO4)•11(H2O) P1 1
 
08.CJ.40 Rauenthalite Ca3(AsO4)2•10(H2O) P1 1
 

Other Phaunouxite Information
Help on References: References: NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Phaunouxite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Phaunouxite

Ca3(AsO4)•11(H2O)
Dana No: 40.03.12.01 Strunz No: 08.CJ.40
Locality:

 

Notes: