Pringleite Mineral Data +

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General Pringleite Information
Chemical Formula:	Ca9B26O34(OH)24Cl4·13(H2O)
Composition:	Molecular Weight = 1,969.93 gm
	Calcium   18.31 %  Ca   25.62 % CaO
	Boron     14.27 %  B    45.94 % B2O3
	Hydrogen   2.56 %  H    22.86 % H2O
	Chlorine   7.20 %  Cl    7.20 % Cl
	-   %  Cl   -1.62 % -O=Cl2
	Oxygen    57.66 %  O
	______        ______
	100.00 %      100.00 % = TOTAL OXIDE
Empirical Formula:	Ca9B26O34(OH)24Cl4·13(H2O)
IMA Status:	Approved IMA 1993
Locality:	Link to MinDat.org Location Data.
Synonym:	ICSD 76888
	IMA1992-010
	PDF 46-1428
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Pringleite Crystallography
Axial Ratios:	a:b:c =0.9769:1:0.7452
Cell Dimensions:	a = 12.759, b = 13.06, c = 9.733, Z = 1; alpha = 102.14°, beta = 102.03°, gamma = 85.68° V = 1,546.34 Den(Calc)= 2.12
Crystal System:	Triclinic - PedialH-M Symbol (1) Space Group: P1
X Ray Diffraction:	By Intensity(I/Io): 7.69(1), 9.21(0.7), 5.74(0.6),
Crystal Structure: Mouse drag1 - LMB Manipulate Structure drag2 - RMB Resize/Rotate Keyboard S - Stereo Pair on/off H - Help Screen I - Data Info A - Atoms On/Off P - Polyhedra On/Off B - Bonds On/Off Help on Above	Grice J D , Burns P C , Hawthorne F C , The Canadian Mineralogist , 32 (1994) p.1-14, Determination of the megastructures of the borate polymorphs pringleite and, ruitenbergite, Note: Cell angles modified by Grice, June 2002
Physical Properties of Pringleite
Cleavage:	[???] Good
Color:	Colorless, Light yellow, Orange.
Density:	2.21
Diaphaniety:	Transparent
Hardness:	3-4 - Calcite-Fluorite
Luster:	Vitreous (Glassy)
Streak:	white
Optical Properties of Pringleite
Gladstone-Dale:	CI meas= 0.014 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= -0.028 (Excellent) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2602,KPDmeas= 0.2496,KC= 0.2531
Optical Data:	Biaxial (+), a=1.537, b=1.548, g=1.57, bire=0.0330, 2V(Calc)=72, 2V(Meas)=71.4-77.
Calculated Properties of Pringleite
Electron Density:	relectron=2.23 gm/cc note: rPringleite =2.21 gm/cc.
Fermion Index	Fermion Index = 0.02892 Boson Index = 0.97108
Photoelectric:	PEPringleite = 2.90 barns/electron U=PEPringleite x relectron= 6.49 barns/cc.
Radioactivity:	GRapi = 0 (Gamma Ray American Petroleum Institute Units) Pringleite is Not Radioactive
Pringleite Classification
Dana Class:	26.5.17.1 (26)Hydrated Borates Containing Hydroxyl or Halogen
	(26.5)Dana Type
	(26.5.17)Dana Group
	26.5.17.1 Pringleite Ca9B26O34(OH)24Cl4·13(H2O) P1 1
	26.5.17.2 Ruitenbergite Ca9B26O34(OH)24Cl4·13(H2O) P 21 2
	26.5.17.3 Brianroulstonite! Ca3[B5O6(OH)6](OH)Cl2·8(H2O) Pa m
	26.5.17.4 Penobsquisite! Ca2Fe[B9O13(OH)6]Cl·4(H2O) P 21 2
	26.5.17.5 Walkerite! Ca16(Mg,Li,[])2[B13O17(OH)12]4Cl6·28(H2O) Pba2 mm2
Strunz Class:	V/K.09-10 V - Nitrates, Carbonates and Borates
	V/K - Layered borates with complex groups [Bx(O,OH)y]
	V/K.09 - Pringleite - Ruitenbergite series
	V/K.09-05 Brianroulstonite! Ca3[B5O6(OH)6](OH)Cl2·8(H2O) Pa m
	V/K.09-10 Pringleite Ca9B26O34(OH)24Cl4·13(H2O) P1 1
	V/K.09-20 Ruitenbergite Ca9B26O34(OH)24Cl4·13(H2O) P 21 2
	V/K.09-25 Walkerite! Ca16(Mg,Li,[])2[B13O17(OH)12]4Cl6·28(H2O) Pba2 mm2
	V/K.09-30 Penobsquisite! Ca2Fe[B9O13(OH)6]Cl·4(H2O) P 21 2
Other Pringleite Information
References:	PHYS. PROP.(Am.Min.,Vol.79,p1011,1994) OPTIC PROP.(Am.Min.,Vol.79,p1011,1994)
See Also:	Links to other databases for Pringleite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris Search for Pringleite using:   Web webmineral.com [ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO] Visit our Advertisers for Pringleite : 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 Pringleite Mineral Data : Ask about Pringleite 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 Pringleite Specimen Label here : Pringleite Ca9B26O34(OH)24Cl4·13(H2O) Dana No: 26.5.17.1 Strunz No: V/K.09-10 Locality:   Notes: