Bobfergusonite Mineral Data (original) (raw)

General Bobfergusonite Information

Help on Chemical Formula: Chemical Formula:

Na2Mn++5Fe+++Al(PO4)6

Help on Composition: Composition:

Molecular Weight = 973.33 gm

Sodium 4.72 % Na 6.37 % Na2O

Manganese 28.22 % Mn 36.44 % MnO

Aluminum 2.77 % Al 5.24 % Al2O3

Iron 5.74 % Fe 8.20 % Fe2O3

Phosphorus 19.09 % P 43.75 % P2O5

Oxygen 39.45 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula:

Na2Mn2+5Fe3+Al(PO4)6

Help on Environment: Environment:

An uncommon primary mineral in the intermediate zone of a granite pegmatite enriched in manganese and fluorine.

Help on IMA Status: IMA Status:

Approved IMA 1986

Help on Locality: Locality:

From the Gotcha claim, on an island in Cross Lake, Manitoba, Canada. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

To honor Emeritus Professor Robert Bury Ferguson (1920- ), Canadian mineralogist, University of Manitoba, Winnipeg, Canada, especially for his contributions to pegmatite mineralogy.

Help on Name Pronunciation: Name Pronunciation:

Bobfergusonite + Pronunciation Say BOBFERGUSONITE

Help on Synonym: Synonym:

ICSD 63261

IMA1984-072

PDF 40-509

Bobfergusonite Image

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

Bobfergusonite Crystallography

Help on Axial Ratios: Axial Ratios:

a:b:c =1.0229:1:0.884

Help on Cell Dimensions: Cell Dimensions:

a = 12.773, b = 12.486, c = 11.038, Z = 4; beta = 97.15° V = 1,746.69 Den(Calc)= 3.70

Help on Crystal System: Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/n

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 3.05(1), 2.08(0.67), 2.87(0.66),

Click Here for Large Bobfergusonite Structure Window Crystal Structure:

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Help on Above

| | Ercit T S , Hawthorne F C , Cerny P , The Canadian Mineralogist , 24 (1986) p.605-614, The crystal structure of bobfergusonite. View Additional jPOWD Structure files for Bobfergusonite [1] | | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

Physical Properties of Bobfergusonite

Help on Cleavage: Cleavage:

{010} Perfect

Help on Color: Color:

Greenish brown, Reddish brown.

Help on Density: Density:

3.54

Help on Diaphaneity: Diaphaneity:

Transparent to Subopaque

Help on Fracture: Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Help on Hardness: Hardness:

4 - Fluorite

Help on Luster: Luster:

Resinous

Help on Streak: Streak:

yellowish brown

Optical Properties of Bobfergusonite

Help on Gladstone-Dale: Gladstone-Dale:

CI meas= 0.011 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.054 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1898,KPDmeas= 0.1984,KC= 0.2006
Ncalc = 1.71 - 1.74

Help on Optical Data: Optical Data:

Biaxial (+), a=1.694, b=1.698, g=1.715, bire=0.0210, 2V(Calc)=54, 2V(Meas)=46.4.

Calculated Properties of Bobfergusonite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=3.40 gm/cc
note: Specific Gravity of Bobfergusonite =3.54 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.0014057662
Boson Index = 0.9985942338

Help on Photoelectric: Photoelectric:

PEBobfergusonite = 10.07 barns/electron
U=PEBobfergusonite x rElectron Density= 34.27 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Bobfergusonite is Not Radioactive

Bobfergusonite Classification

Help on Dana Class: Dana Class:

38.02.04.05 (38)Anhydrous Phosphates, etc

(38.02)(A+ B++)5 (XO4)3

(38.02.04)Alluaudite-Wyllieite Group (Wyllieite Subgroup)

38.02.04.01 Ferrowyllieite (Na,Ca,Mn)(Fe,Mn)(Fe,Fe,Mg)Al(PO4)3 P 21/n 2/m

38.02.04.02 Wyllieite (Na,Ca,Mn)(Mn,Fe)(Fe,Fe,Mg)Al(PO4)3 P 21/n 2/m

38.02.04.03 Rosemaryite (Na,Ca,Mn)(Mn,Fe)(Fe,Fe,Mg)Al(PO4)3 P 21/n 2/m

38.02.04.04 Qingheiite Na2(Mn,Mg,Fe)(Al,Fe)(PO4)3 P 21/n 2/m

38.02.04.05 Bobfergusonite Na2Mn5FeAl(PO4)6 P 21/n 2/m

38.02.04.06 Bradaczekite! NaCu4(AsO4)3 C 2/c 2/m

38.02.04.07 Ferrorosemaryite! []NaFeFeAl(PO4)3 P 21/n 2/m

Help on Strunz Class: Strunz Class:

08.AC.15 08 - PHOSPHATES, ARSENATES, VANADATES

08.A - Phosphates, etc. without additional anions, without H2O

08.AC -With medium-sized and large cations

08.AC.15 Bobfergusonite Na2Mn5FeAl(PO4)6 P 21/n 2/m

08.AC.15 Ferrowyllieite (Na,Ca,Mn)(Fe,Mn)(Fe,Fe,Mg)Al(PO4)3 P 21/n 2/m

08.AC.15 Qingheiite Na2(Mn,Mg,Fe)(Al,Fe)(PO4)3 P 21/n 2/m

08.AC.15 Rosemaryite (Na,Ca,Mn)(Mn,Fe)(Fe,Fe,Mg)Al(PO4)3 P 21/n 2/m

08.AC.15 Wyllieite (Na,Ca,Mn)(Mn,Fe)(Fe,Fe,Mg)Al(PO4)3 P 21/n 2/m

08.AC.15 Ferrorosemaryite! []NaFeFeAl(PO4)3 P 21/n 2/m

Other Bobfergusonite 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 Bobfergusonite :
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 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info
14 - WWW-MINCRYST

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

Bobfergusonite

Na2Mn++5Fe+++Al(PO4)6
Dana No: 38.02.04.05 Strunz No: 08.AC.15
Locality:

Notes: