Strontiowhitlockite Mineral Data
General Strontiowhitlockite Information
Chemical Formula:
Sr7(Mg,Ca)3(PO4)6[PO3(OH)]
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 % P2 O5
Hydrogen 0.07 % H 0.58 % H2 O
Oxygen 31.72 % O
______ ______
100.00 % 100.34 % = TOTAL OXIDE
Empirical Formula:
Sr7 Ca1.4 Mg0.6 Ba0.2 Mg(PO4 )6 (PO3 OH)0.9
Environment:
In cavities in dolomite carbonatite vein cutting pyroxenites in an alkalic massif.
IMA Status:
Approved IMA 1991
Locality:
Zheleznyi iron mine, Kovdor massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Name Origin:
Named as the stronium analog of whitlockite.
Synonym:
IMA1989-040
Strontiowhitlockite Image
Images:
Strontiowhitlockite Crystallography
Axial Ratios:
a:c = 1:3.71476
Cell Dimensions:
a = 10.644, c = 39.54, Z = 6; V = 3,879.51 Den(Calc)= 3.57
Crystal System:
Trigonal - Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3c
X Ray Diffraction:
By Intensity(I/Io ): 3.004(1), 2.661(0.8), 3.288(0.37),
Physical Properties of Strontiowhitlockite
Cleavage:
{0001} Indistinct
Color:
White.
Density:
3.64
Diaphaneity:
Translucent
Habit:
Fibrous - Crystals made up of fibers.
Habit:
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Habit:
Rosette - Bundled tabular aggregates resembling rose flower petals.
Hardness:
5 - Apatite
Luster:
Earthy (Dull)
Streak:
white
Optical Properties of Strontiowhitlockite
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
Optical Data:
Uniaxial (-), e=1.598, w=1.601, bire=0.0030.
Calculated Properties of Strontiowhitlockite
Electron Density:
Bulk Density (Electron Density)=3.40 gm/cc note: Specific Gravity of Strontiowhitlockite =3.64 gm/cc.
Fermion Index:
Fermion Index = 0.03 Boson Index = 0.97
Photoelectric:
PEStrontiowhitlockite = 59.70 barns/electronU=PEStrontiowhitlockite x r Electron Density= 202.83 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Strontiowhitlockite is Not Radioactive
Strontiowhitlockite Classification
Dana Class:
38.03.04.02 (38) Anhydrous Phosphates, etc
(38.03) (A+ B++)3 (XO4)2
(38.03.04) Whitlockite group
38.03.04.01 Whitlockite Ca9(Mg,Fe)(PO4)6(PO3OH) R 3c 3m
38.03.04.02 Strontiowhitlockite Sr7(Mg,Ca)3(PO4)6[PO3(OH)] R 3c 3m
38.03.04.03 Merrillite-(Ca) * (Ca,[])19Mg2(PO4)14 R 3c 3m
38.03.04.04 Merrillite Ca18Na2Mg2(PO4)14 R 3c 3m
38.03.04.05 Merrillite-(Y) * Ca16Y2Mg2(PO4)14 R 3c 3m
38.03.04.06 Ferromerrillite ! Ca9NaFe(PO4)7 R 3c 3m
38.03.04.07 Tuite ! Ca3(PO4)2 R 3 m 3m
38.03.04.08 Bobdownsite ! Ca9Mg(PO3F)(PO4)6 R 3c 3m
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 3 m 3m
08.AC.45 Bobdownsite ! Ca9Mg(PO3F)(PO4)6 R 3c 3m
Other Strontiowhitlockite Information
References:
NAME( AntBidBlaNic4) PHYS. PROP.(Am.Min.,Vol.76,p2024,1991) OPTIC PROP.(Am.Min.,Vol.76,p2024,1991)
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
Search for Strontiowhitlockite using:
[AOL ]
[Bing ]
[Dog Pile ]
[GeoScienceWorld ]
[HotBot ]
[Ixquick ]
[Lycos ]
[MAMMA ]
[Scirus ]
[Teoma ]
[WebCrawler ]
[Wikipedia ]
[YAHOO ]
Visit our Advertisers for Strontiowhitlockite :
Ask about Strontiowhitlockite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in
Espa�ol
Print or Cut-and-Paste your Strontiowhitlockite Specimen Label here :
Strontiowhitlockite
Sr7(Mg,Ca)3(PO4)6[PO3(OH)]
Dana No: 38.03.04.02 Strunz No: 08.AC.45
Locality:
Notes:
Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.