Strontiowhitlockite Mineral Data

Crystal Vaults

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 % P2O5
	Hydrogen     0.07 %  H     0.58 % H2O
	Oxygen      31.72 %  O
	______        ______
	100.00 %      100.34 % = TOTAL OXIDE
Empirical Formula:	Sr7Ca1.4Mg0.6Ba0.2Mg(PO4)6(PO3OH)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   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
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 PyramidalH-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
Diaphaniety:	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
Optical Data:	Uniaxial (-), e=1.598, w=1.601, bire=0.0030.
Calculated Properties of Strontiowhitlockite
Electron Density:	relectron=3.40 gm/cc note: rStrontiowhitlockite =3.64 gm/cc.
Fermion Index	Fermion Index = 0.03735 Boson Index = 0.96265
Photoelectric:	PEStrontiowhitlockite = 59.70 barns/electron U=PEStrontiowhitlockite x relectron= 202.83 barns/cc.
Radioactivity:	GRapi = 0 (Gamma Ray American Petroleum Institute Units) Strontiowhitlockite is Not Radioactive
Strontiowhitlockite Classification
Dana Class:	38.3.4.2 (38)Anhydrous Phosphates, etc
	(38.3)(A+ B++)3 (XO4)2
	(38.3.4)Dana Group
	38.3.4.1 Whitlockite Ca9(Mg,Fe)(PO4)6(PO3OH) R 3c 3m
	38.3.4.2 Strontiowhitlockite Sr7(Mg,Ca)3(PO4)6[PO3(OH)] R 3c 3m
	38.3.4.3 Merrillite-(Ca)* (Ca,[])19Mg2(PO4)14 R 3c 3m
	38.3.4.4 Merrillite-(Na)* Ca18Na2Mg2(PO4)14 R 3c 3m
	38.3.4.5 Merrillite-(Y)* Ca16Y2Mg2(PO4)14 R 3c 3m
Strunz Class:	VII/A.05-60 VII - Phosphates, Arsenates and Vanadates
	VII/A - Waterfree phosphates [PO4]3- without unfamiliar anions. cations of medium size: Mostly Fe, Mn
	VII/A.05 - Farringtonite - Strontiowhitlockite series
	VII/A.05-10 Farringtonite Mg3(PO4)2 P 21/a 2/m
	VII/A.05-20 Stanfieldite Ca4(Mg,Fe,Mn)5(PO4)6 P 2/c 2/m
	VII/A.05-30 Panethite (Na,Ca,K)2(Mg,Fe,Mn)2(PO4)2 P 21/n 2/m
	VII/A.05-40 Brianite Na2CaMg(PO4)2 P 21/a 2/m
	VII/A.05-46 Tuite! Ca3(PO4)2 R 3m 3m
	VII/A.05-50 Whitlockite Ca9(Mg,Fe)(PO4)6(PO3OH) R 3c 3m
	VII/A.05-60 Strontiowhitlockite Sr7(Mg,Ca)3(PO4)6[PO3(OH)] 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 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (UofA) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas 11 -École des Mines de Paris Search for Strontiowhitlockite using:   Web webmineral.com [ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO] Visit our Advertisers for Strontiowhitlockite : AA Mineral Specimens B & L Fine Minerals Crystal Vaults Dan Weinrich Fine Minerals Dan Weinrich Auctions e-Rocks Auctions Excalibur Minerals Exceptional Minerals Fabre Minerals Greenside Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club MineralsWeb Fine Minerals Rockshop.cz T G Fine Minerals Wrights Rock Shop Translate Strontiowhitlockite Mineral Data : 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 Español Print or Cut-and-Paste your Strontiowhitlockite Specimen Label here : Strontiowhitlockite Sr7(Mg,Ca)3(PO4)6[PO3(OH)] Dana No: 38.3.4.2 Strunz No: VII/A.05-60 Locality:   Notes: