Mineralogy Database

Bjarebyite Mineral Data

Search Webmineral :

General Bjarebyite Information

Help on Chemical  Formula: Chemical Formula: (Ba,Sr)(Mn++,Fe++,Mg)2Al2(PO4)3(OH)3
Help on Composition: Composition: Molecular Weight = 648.89 gm
   Barium      23.28 %  Ba   25.99 % BaO
   Strontium    1.35 %  Sr    1.60 % SrO
   Magnesium    0.75 %  Mg    1.24 % MgO
   Manganese    7.62 %  Mn    9.84 % MnO
   Aluminum     7.48 %  Al   14.14 % Al2O3
   Iron         7.75 %  Fe    9.96 % FeO
   Phosphorus  14.32 %  P    32.81 % P2O5
   Hydrogen     0.47 %  H     4.16 % H2O
   Oxygen      36.98 %  O
              ______        ______ 
              100.00 %       99.75 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ba1.1Sr0.1Al1.8Mn2+0.9Fe2+0.9Mg0.2(PO4)3(OH)3
Help on Environment: Environment: Late-stage reaction product of triphylite and amblygonite in complex granite pegmatites.
Help on IMA Status: IMA Status: Approved IMA 1973
Help on Locality: Locality: Palermo #1 mine, near North Groton, Grafton County, New Hampshire, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Alfred Gunnar Bjareby (1899-1967), Swedish-American student of New England pegmatite minerals.
Help on Name Pronunciation: Name Pronunciation: Bjarebyite + Pronunciation Say BJAREBYITE
Help on Synonym: Synonym: ICSD 6207
  PDF 29-171

Bjarebyite Image

Click Here for Larger   Image in a New Browser Window Images:
Click Here for Larger   Image


Comments: Green, pyramidal crystals of bjarebyite.
Location: Palermo No. 1 mine, North Groton, Grafton County, New Hamphshire, USA. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Bjarebyite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.7396:1:0.4072
Help on Cell Dimensions: Cell Dimensions: a = 8.93, b = 12.073, c = 4.917, Z = 2; beta = 100.15° V = 521.81 Den(Calc)= 4.13
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.09(1), 2.681(0.7), 8.81(0.7),

Physical Properties of Bjarebyite

Help on Cleavage: Cleavage: {010} Perfect, {100} Perfect
Help on Color: Color: Emerald green.
Help on Density: Density: 4.02
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Habit: Habit: Striated - Parallel lines on crystal surface or cleavage face.
Help on Hardness: Hardness: 4 - Fluorite
Help on Luster: Luster: Subadamantine
Help on Streak: Streak: white

Optical Properties of Bjarebyite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.032 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.058 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1692,KPDmeas= 0.1739,KC= 0.1797
Ncalc = 1.72 - 1.74
Help on Optical Data: Optical Data: Biaxial (+), a=1.692, b=1.695, g=1.71, bire=0.0180, 2V(Calc)=50, 2V(Meas)=35.
Help on Pleochroism (x): Pleochroism (x): colorless or pale brownish yellow.
Help on Pleochroism (y): Pleochroism (y): brownish green.
Help on Pleochroism (z): Pleochroism (z): olive green or apple green.

Calculated Properties of Bjarebyite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.78 gm/cc
note: Specific Gravity of Bjarebyite =4.02 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PEBjarebyite = 106.11 barns/electron
U=PEBjarebyite x rElectron Density= 401.13 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Bjarebyite is Not Radioactive

Bjarebyite Classification

Help on  Dana Class: Dana Class: (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.09)where (A B)5 (XO4)3 Zq
  (41.09.01)Kulanite Group Kulanite Ba(Fe,Mn,Mg)2Al2(PO4)3(OH)3 P 21/m 2/m Penikisite BaMg2Al2(PO4)3(OH)3 P1 1 Bjarebyite (Ba,Sr)(Mn,Fe,Mg)2Al2(PO4)3(OH)3 P 21/m 2/m Perloffite Ba(Mn,Fe)2Fe2(PO4)3(OH)3 P 21/m 2/m Johntomaite! Ba(Fe,Ca,Mn)2Fe2(PO4)3(OH)3 P 21/m 2/m
Help on  Strunz Class: Strunz Class: 08.BH.20 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BH -With medium-sized and large cations, (OH,etc.):RO4 = 1:1
08.BH.20 Bjarebyite (Ba,Sr)(Mn,Fe,Mg)2Al2(PO4)3(OH)3 P 21/m 2/m
08.BH.20 Kulanite Ba(Fe,Mn,Mg)2Al2(PO4)3(OH)3 P 21/m 2/m
08.BH.20 Penikisite BaMg2Al2(PO4)3(OH)3 P1 1
08.BH.20 Perloffite Ba(Mn,Fe)2Fe2(PO4)3(OH)3 P 21/m 2/m
08.BH.20 Johntomaite! Ba(Fe,Ca,Mn)2Fe2(PO4)3(OH)3 P 21/m 2/m

Other Bjarebyite Information

Help on References: References: NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic4)
Help on See Also: See Also: Links to other databases for Bjarebyite :
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

Search for Bjarebyite using:

Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Bjarebyite :

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

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


Dana No: Strunz No: 08.BH.20





Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.