Beusite Mineral Data (original) (raw)

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

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

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 - PrismaticH-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),

Click Here for Large Beusite Structure Window Crystal Structure:

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Help on Above

| | Steele I M , Olsen E , Pluth J J , Davis A M , American Mineralogist , 76 (1991) p.1985-1989, Occurrence and crystal structure of Ca-free beusite in the El Sampal IIIA iron, meteorite View Additional jPOWD Structure files for Beusite [1] | | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

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:

38.03.03.02 (38)Anhydrous Phosphates, etc

(38.03)(A+ B++)3 (XO4)2

(38.03.03)Dana Group

38.03.03.01 Graftonite (Fe,Mn,Ca)3(PO4)2 P 21/c 2/m

38.03.03.02 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
15 - WWW-MINCRYST

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

Beusite

(Mn++,Fe++,Ca,Mg)3(PO4)2
Dana No: 38.03.03.02 Strunz No: 08.AB.20
Locality:

Notes: