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Bearthite Mineral Data

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General Bearthite Information

Help on Chemical  Formula: Chemical Formula: Ca2Al(PO4)2(OH)
Help on Composition: Composition: Molecular Weight = 314.09 gm
   Calcium     25.52 %  Ca   35.71 % CaO
   Aluminum     8.59 %  Al   16.23 % Al2O3
   Phosphorus  19.72 %  P    45.19 % P2O5
   Hydrogen     0.32 %  H     2.87 % H2O
   Oxygen      45.85 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca2Al(PO4)2(OH)
Help on Environment: Environment: In synmetamorphic quartz segregations and as an accessory mineral in high-pressure metamorphic rocks. Experimental study indicates that the stability of bearthite is restricted to v ery Ca-poor or P-rich rocks under mode
Help on IMA Status: IMA Status: Approved IMA 1993
Help on Locality: Locality: Found on the western ridge of the Stockhorn, Zermatt Valley, Valais, Switzerland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Honors Professor Peter Bearth (1902-1989), for his pioneering petrologic studies of the high-pressure terranes of the western Alps.
Help on Name Pronunciation: Name Pronunciation: Bearthite + Pronunciation Say BEARTHITE
Help on Synonym: Synonym: ICSD 74169
  IMA1986-050
  PDF 45-1483
 

Bearthite Crystallography

Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.05(1), 2.867(0.61), 2.568(0.39),
 

Physical Properties of Bearthite

Help on Color: Color: Yellow, Colorless.
 

Optical Properties of Bearthite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= 0.49 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1026,KC= 0.201
Ncalc = 2.32
 

Calculated Properties of Bearthite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.55 gm/cc
note: Specific Gravity of Bearthite =6.59 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0005650627
Boson Index = 0.9994349373
Help on Photoelectric: Photoelectric: PEBearthite = 4.34 barns/electron
U=PEBearthite x rElectron Density= 28.39 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Bearthite is Not Radioactive
 

Bearthite Classification

Help on  Dana Class: Dana Class: 41.10.04.02 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.10)where (A++ B++)3 (XO4)2 Zq
  (41.10.04)Goedkenite Group
 
41.10.04.01 Goedkenite (Sr,Ca)2Al(PO4)2(OH) P 21/m 2/m
 
41.10.04.02 Bearthite Ca2Al(PO4)2(OH) P 21/m 2/m
 
41.10.04.03 Gamagarite Ba2(Fe,Mn)(VO4)2(OH) P 21/m 2/m
 
41.10.04.04 Tokyoite! Ba2Mn(VO4)2(OH) P 21/m 2/m
Help on  Strunz Class: Strunz Class: 08.BG.05 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BG -With medium-sized and large cations, (OH, etc.):RO4 = 0.5:1
 
08.BG.05 Arsenbrackebuschite Pb2(Fe,Zn)(AsO4)2•(H2O) P 21/m 2/m
 
08.BG.05 Bearthite Ca2Al(PO4)2(OH) P 21/m 2/m
 
08.BG.05 Arsentsumebite Pb2Cu(AsO4)(SO4)(OH) P 21/m 2/m
 
08.BG.05 Brackebuschite Pb2(Mn,Fe)(VO4)2(OH) P 21/m 2/m
 
08.BG.05 Feinglosite! Pb2(Zn,Fe)[(As,S)O4]2•(H2O) P 21,P 21/m Mono
 
08.BG.05 Gamagarite Ba2(Fe,Mn)(VO4)2(OH) P 21/m 2/m
 
08.BG.05 Goedkenite (Sr,Ca)2Al(PO4)2(OH) P 21/m 2/m
 
08.BG.05 Tsumebite Pb2Cu(PO4)(SO4)(OH) P 21/m 2/m
 
08.BG.05 Calderonite! Pb2Fe(VO4)2(OH) P 21/m 2/m
 
08.BG.05 Bushmakinite! Pb2Al(PO4)(VO4)(OH) P 21/m 2/m
 
08.BG.05 Tokyoite! Ba2Mn(VO4)2(OH) P 21/m 2/m
 

Other Bearthite Information

Help on See Also: See Also: Links to other databases for Bearthite :
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
15 - WWW-MINCRYST

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

Bearthite

Ca2Al(PO4)2(OH)
Dana No: 41.10.04.02 Strunz No: 08.BG.05
Locality:

 

Notes:

 

 


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