Bergslagite Mineral Data

Bergslagite Mineral Data
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General Bergslagite Information

Help on Chemical Formula: Chemical Formula: CaBe(AsO4)(OH)
Help on Composition: Composition: Molecular Weight = 205.02 gm
   Calcium    19.55 %  Ca   27.35 % CaO
   Beryllium   4.40 %  Be   12.20 % BeO
   Arsenic    36.54 %  As   56.05 % As2O5
   Hydrogen    0.49 %  H     4.39 % H2O
   Oxygen     39.02 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaBe(AsO4)(OH)
Help on Environment: Environment: In thin veins in pieces of hematite ore found on mine dumps from a metamorphosed Fe-Mn orebody.
Help on IMA Status: IMA Status: Approved IMA 1982
Help on Locality: Locality: For Langban, Varmland, Sweden. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For the occurrence at Langban, which is in the Bergslagen region of Sweden.
Help on Name Pronunciation: Name Pronunciation: Bergslagite + Pronunciation Say BERGSLAGITE
Help on Synonym: Synonym: ICSD 31384
  PDF 36-650
 

Bergslagite Image

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Bergslagite

Comments: White (fluorescent) veinlet of bergslagite cutting through metallic, gray hematite.
Location: Langban Mine Dump, Langban, Varmland, Sweden. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Bergslagite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.6251:1:1.2968
Help on Cell Dimensions: Cell Dimensions: a = 4.8818, b = 7.809, c = 10.127, Z = 4; beta = 90.16° V = 386.06 Den(Calc)= 3.53
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.2(1), 3.519(0.8), 4.879(0.7),
Click Here for Large Bergslagite Structure Window Crystal Structure:

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Hansen S , Falth L , Johnson O , Zeitschrift fur Kristallographie , 166 (1984) p.73-80, Bergslagite, a mineral with tetrahedral, berylloarsenate sheet anions, Note: anisoB s from ICSD

 

Physical Properties of Bergslagite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless, Gray, Gray white, White.
Help on Density: Density: 3.4
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Bergslagite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.036 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.002 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1921,KPDmeas= 0.1994,KC= 0.1925
Ncalc = 1.65 - 1.68
Help on Optical Data: Optical Data: Biaxial (-), a=1.659, b=1.681, g=1.694, bire=0.0350, 2V(Calc)=74, 2V(Meas)=70.
 

Calculated Properties of Bergslagite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.37 gm/cc
note: Specific Gravity of Bergslagite =3.53 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PEBergslagite = 27.30 barns/electron
U=PEBergslagite x rElectron Density= 92.13 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Bergslagite is Not Radioactive
 

Bergslagite Classification
Help on Dana Class: Dana Class: 41.05.04.04 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.05)where (A B)2 (XO4) Zq
  (41.05.04)Herderite Group
 
41.05.04.01 Herderite CaBe(PO4)F P 21/a 2/m
 
41.05.04.02 Hydroxylherderite CaBe(PO4)(OH) P 21/a 2/m
 
41.05.04.03 Vayrynenite MnBe(PO4)(OH,F) P 21/a 2/m
 
41.05.04.04 Bergslagite CaBe(AsO4)(OH) P 21/c 2/m
Help on Strunz Class: Strunz Class: 08.BA.10 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BA -With small and medium-sized cations
 
08.BA.10 Bergslagite CaBe(AsO4)(OH) P 21/c 2/m
 
08.BA.10 Herderite CaBe(PO4)F P 21/a 2/m
 
08.BA.10 Hydroxylherderite CaBe(PO4)(OH) P 21/a 2/m
 

Other Bergslagite 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 Bergslagite :
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 - Scandinavian mineral gallery
16 - WWW-MINCRYST

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Bergslagite

CaBe(AsO4)(OH)
Dana No: 41.05.04.04 Strunz No: 08.BA.10
Locality:

 

Notes: