Mineralogy Database

Beusite Mineral Data

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General Beusite Information

Help on Chemical  Formula: Chemical Formula: (Mn++,Fe++,Ca,Mg)3(PO4)2
Help on Composition: Composition: Molecular Weight = 344.81 gm
   Calcium      3.49 %  Ca    4.88 % CaO
   Magnesium    1.41 %  Mg    2.34 % MgO
   Manganese   28.68 %  Mn   37.03 % MnO
   Iron        11.34 %  Fe   14.59 % FeO
   Phosphorus  17.97 %  P    41.17 % P2O5
   Oxygen      37.12 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+1.8Fe2+0.7Ca0.3Mg0.2(PO4)2
Help on Environment: Environment: Late-stage accessory mineral in complex granite pegmatites and as euhedral inclusions in troilite nodules in an iron meteorite.
Help on IMA Status: IMA Status: Approved IMA 1968
Help on Locality: Locality: Los Aleros pegmatite, Argentina. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Alexey Alexandrovich Beus, Professor of Mineralogy and Geochemistry, Moscow Polytechnical Institute.
Help on Name Pronunciation: Name Pronunciation: Beusite Say BEUSITE
Help on Synonym: Synonym: ICSD 71051
  PDF 36-401

Beusite Image

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Comments: Massive pale pinkish-beige beusite with blue vivianite.
Location: Remmelberg, Oberpfalz, Bavaria, Germany. Scale: Picture size 7 mm.
© Thomas Witzke / Abraxas-Verlag

Beusite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.7621:1:0.5338
Help on Cell Dimensions: Cell Dimensions: a = 8.78, b = 11.52, c = 6.15, Z = 4; beta = 99.42° V = 613.66 Den(Calc)= 3.73
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.863(1), 3.49(1), 2.708(0.6),

Physical Properties of Beusite

Help on Cleavage: Cleavage: {010} Good, {100} Distinct
Help on Color: Color: Reddish brown.
Help on Density: Density: 3.6 - 3.7, Average = 3.65
Help on Diaphaneity: Diaphaneity: Translucent
Help on Habit: Habit: Lamellar - Thin laminae producing a lamellar structure.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: light pink

Optical Properties of Beusite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.01 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.012 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1883,KPDmeas= 0.1925,KC= 0.1906
Ncalc = 1.69 - 1.71
Help on Optical Data: Optical Data: Biaxial (+), a=1.685-1.708, b=1.688-1.711, g=1.7-1.723, bire=0.0150, 2V(Calc)=54, 2V(Meas)=25. Dispersion r > v strong.

Calculated Properties of Beusite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.51 gm/cc
note: Specific Gravity of Beusite =3.65 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0040385858
Boson Index = 0.9959614142
Help on Photoelectric: Photoelectric: PEBeusite = 12.15 barns/electron
U=PEBeusite x rElectron Density= 42.59 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Beusite is Not Radioactive

Beusite Classification

Help on  Dana Class: Dana Class: (38)Anhydrous Phosphates, etc
  (38.03)(A+ B++)3 (XO4)2
  (38.03.03)Dana Group Graftonite (Fe,Mn,Ca)3(PO4)2 P 21/c 2/m Beusite (Mn,Fe,Ca,Mg)3(PO4)2 P 21/c 2/m
Help on  Strunz Class: Strunz Class: 08.AB.20 08 - PHOSPHATES, ARSENATES, VANADATES
  08.A - Phosphates, etc. without additional anions, without H2O
  08.AB -With medium-sized cations
08.AB.20 Beusite (Mn,Fe,Ca,Mg)3(PO4)2 P 21/c 2/m
08.AB.20 Graftonite (Fe,Mn,Ca)3(PO4)2 P 21/c 2/m

Other Beusite 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 Beusite :
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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Dana No: Strunz No: 08.AB.20





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