Mineralogy Database

Strontiowhitlockite Mineral Data

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General Strontiowhitlockite Information

Help on Chemical  Formula: Chemical Formula: Sr7(Mg,Ca)3(PO4)6[PO3(OH)]
Help on Composition: Composition: Molecular Weight = 1,392.01 gm
   Barium       1.97 %  Ba    2.20 % BaO
   Strontium   44.06 %  Sr   52.11 % SrO
   Calcium      4.03 %  Ca    5.64 % CaO
   Magnesium    2.79 %  Mg    4.63 % MgO
   Phosphorus  15.35 %  P    35.18 % P2O5
   Hydrogen     0.07 %  H     0.58 % H2O
   Oxygen      31.72 %  O
              ______        ______ 
              100.00 %      100.34 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Sr7Ca1.4Mg0.6Ba0.2Mg(PO4)6(PO3OH)0.9
Help on Environment: Environment: In cavities in dolomite carbonatite vein cutting pyroxenites in an alkalic massif.
Help on IMA Status: IMA Status: Approved IMA 1991
Help on Locality: Locality: Zheleznyi iron mine, Kovdor massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as the stronium analog of whitlockite.
Help on Synonym: Synonym: IMA1989-040

Strontiowhitlockite Image

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  Strontiowhitlockite   Bobierrite

Comments: Pale white to pink fine grained strontiowhitlockite with bobierrite.
Location: Kovdor Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Strontiowhitlockite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:3.71476
Help on Cell Dimensions: Cell Dimensions: a = 10.644, c = 39.54, Z = 6; V = 3,879.51 Den(Calc)= 3.57
Help on Crystal System: Crystal System: Trigonal - Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.004(1), 2.661(0.8), 3.288(0.37),

Physical Properties of Strontiowhitlockite

Help on Cleavage: Cleavage: {0001} Indistinct
Help on Color: Color: White.
Help on Density: Density: 3.64
Help on Diaphaneity: Diaphaneity: Translucent
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Habit: Habit: Rosette - Bundled tabular aggregates resembling rose flower petals.
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Earthy (Dull)
Help on Streak: Streak: white

Optical Properties of Strontiowhitlockite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.007 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.013 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1679,KPDmeas= 0.1647,KC= 0.1658
Ncalc = 1.59 - 1.6
Help on Optical Data: Optical Data: Uniaxial (-), e=1.598, w=1.601, bire=0.0030.

Calculated Properties of Strontiowhitlockite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.40 gm/cc
note: Specific Gravity of Strontiowhitlockite =3.64 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEStrontiowhitlockite = 59.70 barns/electron
U=PEStrontiowhitlockite x rElectron Density= 202.83 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Strontiowhitlockite is Not Radioactive

Strontiowhitlockite Classification

Help on  Dana Class: Dana Class: (38)Anhydrous Phosphates, etc
  (38.03)(A+ B++)3 (XO4)2
  (38.03.04)Whitlockite group Whitlockite Ca9(Mg,Fe)(PO4)6(PO3OH) R 3c 3m Strontiowhitlockite Sr7(Mg,Ca)3(PO4)6[PO3(OH)] R 3c 3m Merrillite-(Ca)* (Ca,[])19Mg2(PO4)14 R 3c 3m Merrillite Ca18Na2Mg2(PO4)14 R 3c 3m Merrillite-(Y)* Ca16Y2Mg2(PO4)14 R 3c 3m Ferromerrillite! Ca9NaFe(PO4)7 R 3c 3m Tuite! Ca3(PO4)2 R 3m 3m Bobdownsite! Ca9Mg(PO3F)(PO4)6 R 3c 3m
Help on  Strunz Class: Strunz Class: 08.AC.45 08 - PHOSPHATES, ARSENATES, VANADATES
  08.A - Phosphates, etc. without additional anions, without H2O
  08.AC -With medium-sized and large cations
08.AC.45 Merrillite-(Ca)* (Ca,[])19Mg2(PO4)14 R 3c 3m
08.AC.45 Merrillite Ca18Na2Mg2(PO4)14 R 3c 3m
08.AC.45 Merrillite-(Y)* Ca16Y2Mg2(PO4)14 R 3c 3m
08.AC.45 Strontiowhitlockite Sr7(Mg,Ca)3(PO4)6[PO3(OH)] R 3c 3m
08.AC.45 Whitlockite Ca9(Mg,Fe)(PO4)6(PO3OH) R 3c 3m
08.AC.45 Ferromerrillite! Ca9NaFe(PO4)7 R 3c 3m
08.AC.45 Tuite! Ca3(PO4)2 R 3m 3m
08.AC.45 Bobdownsite! Ca9Mg(PO3F)(PO4)6 R 3c 3m

Other Strontiowhitlockite Information

Help on References: References: NAME( AntBidBlaNic4) PHYS. PROP.(Am.Min.,Vol.76,p2024,1991) OPTIC PROP.(Am.Min.,Vol.76,p2024,1991)
Help on See Also: See Also: Links to other databases for Strontiowhitlockite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - Ecole des Mines de Paris
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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Dana No: Strunz No: 08.AC.45





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