Mineralogy Database

Bradleyite Mineral Data

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General Bradleyite Information

Help on Chemical  Formula: Chemical Formula: Na3Mg(PO4)(CO3)
Help on Composition: Composition: Molecular Weight = 248.25 gm
   Sodium      27.78 %  Na   37.45 % Na2O
   Magnesium    9.79 %  Mg   16.24 % MgO
   Phosphorus  12.48 %  P    28.59 % P2O5
   Carbon       4.84 %  C    17.73 % CO2
   Oxygen      45.11 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na3Mg(PO4)(CO3)
Help on Environment: Environment: Rare mineral in oil shale in the Green River formation.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1941
Help on Locality: Locality: John Hay, Jr. Well No.1, about 30 km west of Green River, Sweetwater County, Wyoming, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Wilmot Hyde Bradley (1899-1979), geologist, U.S. Geological Survey, who studied the Green River formation.
Help on Name Pronunciation: Name Pronunciation: Bradleyite + Pronunciation Say BRADLEYITE

Bradleyite Image

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  Loughlinite   Bradleyite

Comments: Silky fibrous veinlets of loughlinite with bradleyite.
Location: Green River area, Sweetwater County, Wyoming, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Bradleyite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.3348:1:0.7782
Help on Cell Dimensions: Cell Dimensions: a = 8.85, b = 6.63, c = 5.16, Z = 2; beta = 90.417° V = 302.76 Den(Calc)= 2.72
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): 2.66(1), 3.32(1), 2.57(0.8),

Physical Properties of Bradleyite

Help on Color: Color: Gray, Colorless, White.
Help on Density: Density: 2.734
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Hardness: Hardness: 3-4 - Calcite-Fluorite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Bradleyite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.007 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.002 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.193,KPDmeas= 0.192,KC= 0.1933
Ncalc = 1.53
Help on Optical Data: Optical Data: Biaxial (-), a=1.49, g=1.56, bire=0.0700

Calculated Properties of Bradleyite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.67 gm/cc
note: Specific Gravity of Bradleyite =2.72 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEBradleyite = 1.31 barns/electron
U=PEBradleyite x rElectron Density= 3.49 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Bradleyite is Not Radioactive

Bradleyite Classification

Help on  Dana Class: Dana Class: (43)Compound Phosphates, etc.
  (43.02)(Anhydrous Normal Compound Anions)
  (43.02.01)Bradleyite Group Bradleyite Na3Mg(PO4)(CO3) P 21/m 2/m Sidorenkite Na3Mn(PO4)(CO3) P 21/m 2/m Bonshtedtite Na3Fe(PO4)(CO3) P 21/m 2/m Crawfordite Na3Sr(PO4)(CO3) P 21 2
Help on  Strunz Class: Strunz Class: 05.BF.10 05 - CARBONATES (NITRATES)
  05.B - Carbonates with additional anions, without H2O
  05.BF -With (Cl), SO4, PO4, TeO3
05.BF.10 Bonshtedtite Na3Fe(PO4)(CO3) P 21/m 2/m
05.BF.10 Crawfordite Na3Sr(PO4)(CO3) P 21 2
05.BF.10 Bradleyite Na3Mg(PO4)(CO3) P 21/m 2/m
05.BF.10 Sidorenkite Na3Mn(PO4)(CO3) P 21/m 2/m

Other Bradleyite 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 Bradleyite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - EUROmin Project
6 - Ecole des Mines de Paris
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info

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


Dana No: Strunz No: 05.BF.10





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