Bearsite Mineral Data

Bearsite Mineral Data
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General Bearsite Information

Help on Chemical Formula: Chemical Formula: Be2(AsO4)(OH)•4(H2O)
Help on Composition: Composition: Molecular Weight = 246.01 gm
   Beryllium   7.33 %  Be   20.33 % BeO
   Arsenic    30.45 %  As   46.71 % As2O5
   Hydrogen    3.69 %  H    32.95 % H2O
   Oxygen     58.53 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Be2(AsO4)(OH)•4(H2O)
Help on Environment: Environment: Oxidation zone of a polymetallic deposit.
Help on IMA Status: IMA Status: Approved IMA 1962
Help on Locality: Locality: Kazakhstan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the composition (Be, Arsenic).
Help on Name Pronunciation: Name Pronunciation: Bearsite Say BEARSITE
Help on Synonym: Synonym: ICSD 74041
  PDF 45-378
 

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Bearsite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.2317:1:0.1932
Help on Cell Dimensions: Cell Dimensions: a = 8.55, b = 36.9, c = 7.13, Z = 12; beta = 97.816° V = 2,228.58 Den(Calc)= 2.20
Help on Crystal System: Crystal System: MonoclinicSpace Group: Cc or C 2/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 6.95(1), 3.31(0.8), 4.23(0.6),
Click Here for Large Bearsite Structure Window Crystal Structure:

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drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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Harrison W T A , Nenoff T M , Gier T E , Stucky G D , Inorganic Chemistry , 32 (1993) p.2437-2441, Tetrahedral-atom 3-ring groupings in 1-dimensional inorganic chains:, Be2AsO4OH*4H2O and Na2ZnPO4OH*7H2O, Locality: synthetic

 

Physical Properties of Bearsite

Help on Color: Color: White.
Help on Density: Density: 1.8 - 2, Average = 1.9
Help on Diaphaneity: Diaphaneity: Translucent
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Striated - Parallel lines on crystal surface or cleavage face.
Help on Streak: Streak: white
 

Optical Properties of Bearsite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.108 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.043 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2264,KPDmeas= 0.2621,KC= 0.2365
Ncalc = 1.43 - 1.52
Help on Optical Data: Optical Data: Biaxial (-), a=1.49, b=1.502, g=1.502, bire=0.0120
 

Calculated Properties of Bearsite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.18 gm/cc
note: Specific Gravity of Bearsite =2.20 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.07
Boson Index = 0.93
Help on Photoelectric: Photoelectric: PEBearsite = 20.07 barns/electron
U=PEBearsite x rElectron Density= 43.79 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Bearsite is Not Radioactive
 

Bearsite Classification
Help on Dana Class: Dana Class: 42.06.01.02 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.06)where (AB)2 (XO4) Zq · x(H2O)
  (42.06.01)Moraesite Group
 
42.06.01.01 Moraesite Be2(PO4)(OH)•4(H2O) Cc,C 2/c Mono
 
42.06.01.02 Bearsite Be2(AsO4)(OH)•4(H2O) Cc or C 2/c Mono
Help on Strunz Class: Strunz Class: 08.DA.05 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DA -With small (and occasionally larger) cations
 
08.DA.05 Bearsite Be2(AsO4)(OH)•4(H2O) Cc or C 2/c Mono
 
08.DA.05 Moraesite Be2(PO4)(OH)•4(H2O) Cc,C 2/c Mono
 

Other Bearsite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Bearsite :
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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Print or Cut-and-Paste your Bearsite Specimen Label here :

Bearsite

Be2(AsO4)(OH)•4(H2O)
Dana No: 42.06.01.02 Strunz No: 08.DA.05
Locality:

 

Notes: