Paratsepinite-Ba Mineral Data

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General Paratsepinite-Ba Information
Chemical Formula:	(Ba,Na,K)2-x(Ti,Nb)2(Si4O12)(OH,O)2·4(H2O)
Composition:	Molecular Weight = 628.25 gm
	Potassium   1.43 %  K     1.72 % K2O
	Barium     10.06 %  Ba   11.23 % BaO
	Sodium      1.35 %  Na    1.83 % Na2O
	Strontium   1.67 %  Sr    1.98 % SrO
	Titanium   10.75 %  Ti   17.93 % TiO2
	Manganese   0.96 %  Mn    1.24 % MnO
	Niobium     8.13 %  Nb   11.64 % Nb2O5
	Silicon    18.33 %  Si   39.21 % SiO2
	Hydrogen    1.45 %  H    12.96 % H2O
	Oxygen     45.87 %  O
	______        ______
	100.00 %       99.73 % = TOTAL OXIDE
Empirical Formula:	Ba0.46Na0.37K0.23Sr0.12Mn2+0.11Ti1.41Nb0.55Si4.1O12.39(OH)1.8O0.2·3.62(H2O)
Environment:	Hydrothermal mineral in an alkaline pegmatite. Labuntsovite group; structure determined.
IMA Status:	Approved IMA 2002 (Dana # Added)
Locality:	Lepkhe-Nelm Mountain, Lovozero massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Name Origin:	Named for the relationship to tsepinite-Na.
Synonym:	IMA2002-006
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Paratsepinite-Ba Crystallography
Axial Ratios:	a:b:c =1.0392:1:1.1214
Cell Dimensions:	a = 14.551, b = 14.001, c = 15.702, Z = 8; beta = 117.58° V = 2,835.43 Den(Calc)= 2.94
Crystal System:	Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m
X Ray Diffraction:	By Intensity(I/Io): 3.95(1)(202,204), 7.11(1)(020), 1.914(0.9)(208),3.24(0.9)(400,404), 2.403(0.8)(602), 3.11(0.8)(042,024), 4.08(0.8)(310),
Physical Properties of Paratsepinite-Ba
Cleavage:	None
Color:	Brown.
Density:	2.88
Diaphaniety:	Transparent
Fracture:	Brittle - Uneven - Very brittle fracture producing uneven fragments.
Habit:	Aggregates - Made of numerous individual crystals or clusters.
Habit:	Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Hardness:	5 - Apatite
Luster:	Vitreous (Glassy)
Streak:	white
Optical Properties of Paratsepinite-Ba
Gladstone-Dale:	CI meas= 0.037 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= 0.057 (Good) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2393,KPDmeas= 0.2443,KC= 0.2538
Optical Data:	Biaxial (+), a=1.667, b=1.674, g=1.77, bire=0.1030, 2V(Calc)=32, 2V(Meas)=30. Dispersion dispersion not observed.
Calculated Properties of Paratsepinite-Ba
Electron Density:	relectron=2.80 gm/cc note: rParatsepinite-Ba =2.88 gm/cc.
Fermion Index	Fermion Index = 0.04176 Boson Index = 0.95824
Photoelectric:	PEParatsepinite-Ba = 58.01 barns/electron U=PEParatsepinite-Ba x relectron= 162.52 barns/cc.
Radioactivity:	GRapi = 20.11 (Gamma Ray American Petroleum Institute Units) Estimated Radioactivity from Paratsepinite-Ba - barely detectable
Paratsepinite-Ba Classification
Dana Class:	60.1.3b.5 (60)Cyclosilicate Four-Membered Rings
	(60.1)as Titanosilicates
	(60.1.3b)Labuntsovite Group (Vuoriyarvite subgroup Monoclinic [Cm])
	60.1.3b.1 Vuoriyarvite-K! (K,Na)2(Nb,Ti)2Si4O12(O,OH)2·4(H2O) Cm m
	60.1.3b.2 Tsepinite-Na! (Na,H3O,K,Sr,Ba)2(Ti,Nb)2[Si4O12](OH,O)2·3(H2O) Cm m
	60.1.3b.3 Tsepinite-K! (K,Ba,Na)2(Ti,Nb)2(Si4O12)(OH,O)2·3(H2O) Cm m
	60.1.3b.4 Tsepinite-Ca! (Ca,K,Na,[])2(Ti,Nb)2(Si4O12)(OH,O)2·4(H2O) C 2/m 2/m
	60.1.3b.5 Paratsepinite-Ba ! (Ba,Na,K)2-x(Ti,Nb)2(Si4O12)(OH,O)2·4(H2O) C 2/m 2/m
Strunz Class:	VIII/E.07-34 VIII - Silicates
	VIII/E - Cyklosilicates, quadruplet rings [Si4O11]8-
	VIII/E.07 - Labuntsovite Group
	VIII/E.07-10 Korobitsynite! Na3(Ti,Nb)2[Si4O12](OH,O)2·3-4(H2O) Pbam 2/m 2/m 2/m
	VIII/E.07-20 Nenadkevichite (Na,Ca,K)(Nb,Ti)Si2O6(O,OH)·2(H2O) Pbam 2/m 2/m 2/m
	VIII/E.07-30* Strontiochevkinite (Sr,REE)4Fe(Ti,Zr)2Ti2Si4O22 C 2/a 2/m
	VIII/E.07-30 Tsepinite-Na! (Na,H3O,K,Sr,Ba)2(Ti,Nb)2[Si4O12](OH,O)2·3(H2O) Cm m
	VIII/E.07-32 Tsepinite-K! (K,Ba,Na)2(Ti,Nb)2(Si4O12)(OH,O)2·3(H2O) Cm m
	VIII/E.07-33 Tsepinite-Ca! (Ca,K,Na,[])2(Ti,Nb)2(Si4O12)(OH,O)2·4(H2O) C 2/m 2/m
	VIII/E.07-34 Paratsepinite-Ba (Ba,Na,K)2-x(Ti,Nb)2(Si4O12)(OH,O)2·4(H2O) C 2/m 2/m
	VIII/E.07-40 Vuoriyarvite-K! (K,Na)2(Nb,Ti)2Si4O12(O,OH)2·4(H2O) Cm m
	VIII/E.07-50 Clinophosinaite! Na3CaPSiO7 P 2/c 2/m
	VIII/E.07-50* Kuzmenkoite-Zn! K2Zn(Ti,Nb)4(Si4O12)2(OH,O)4·6-8(H2O) Cm m
	VIII/E.07-60* Kuzmenkoite-Mn! (K,Na)2(Mn,Fe)(Ti,Nb)4[Si4O12]2(OH)4·5(H2O) C 2/m 2/m
	VIII/E.07-60 Phosinaite-(Ce)! Na13Ca2Ce[Si4O12](PO4)4 P 22121 2 2 2
	VIII/E.07-70 Gjerdingenite-Fe! K2[(H2O)2(Fe,Mn)][(Nb,Ti)4(Si4O12)2(O,OH)4]·4(H2O) C 2/m 2/m
	VIII/E.07-80 Gjerdingenite-Mn! (K,Na)2(Mn,Fe)(Nb,Ti)4(Si4O12)2(O,OH)4·6(H2O) C 2/m 2/m
	VIII/E.07-90 Karupmollerite-Ca! (Na,Ca,K)2Ca(Nb,Ti)4(Si4O12)2(O,OH)4·7(H2O) C 2/m 2/m
	VIII/E.07-100 Lemmleinite-K! NaK2(Ti,Nb)2Si4O12(O,OH)2·2(H2O) C 2/m 2/m
	VIII/E.07-110 Lemmleinite-Ba! Na2K2Ba1-xTi4(Si4O12)2(O,OH)4·5(H2O) C 2/m 2/m
	VIII/E.07-130 Paralabuntsovite-Mg! Na8K8Mg8Ti16(Si4O12)8(O,OH)16·n(H2O) I2/m 2/m
	VIII/E.07-140 Labuntsovite-Mg! Na4K4(Ba,K)(Mg,Fe)1xTi8(Si4O12)4(O,OH)8·10(H2O) C 2/m 2/m
	VIII/E.07-150 Labuntsovite-Fe! Na4K4(Ba,K)2(Fe,Mg,Mn)1xTi8(Si4O12)4(O,OH)8·10(H2O) C 2/m 2/m
	VIII/E.07-155 Labuntsovite-Mn Na4K4(Ba,K)(Mn,Fe)1x(Ti,Nb)8[Si4O12]4(O,OH)8·n(H2O),n=10-12 I2/m 2/m
	VIII/E.07-170 Parakuzmenkoite-Fe! (K,Ba)2Fe(Ti,Nb)4(Si4O12)2(O,OH)4·7(H2O) C 2/m 2/m
	VIII/E.07-180 Organovaite-Zn! K2Zn(Nb,Ti)4(Si4O12)2(O,OH)4·6(H2O) C 2/m 2/m
	VIII/E.07-190 Organovaite-Mn! K2Mn(Nb,Ti)4(Si4O12)2(O,OH)4·6(H2O) Cm m
	VIII/E.07-200 Gutkovaite-Mn! CaK2Mn(Ti,Nb)4(Si4O12)2(O,OH)4·5(H2O) Cm m
	VIII/E.07-205 Neskevaaraite-Fe! NaK3Fe(Ti,Nb)4(Si4O12)2(O,OH)4·6(H2O) Cm m
	VIII/E.07-210 Alsakharovite-Zn! NaSrKZn(Ti,Nb)4(Si4O12)2(O,OH)4·7(H2O) Cm m
	VIII/E.07-220 Lepkhenelmite-Zn! Ba2Zn(Ti,Nb)4(Si4O12)2(O,OH)4·7(H2O) Cm m
Other Paratsepinite-Ba Information
References:	NAME( CanMin, v 42, p 234) PHYS. PROP.(CanMin, v 42, p 234) OPTIC PROP.(CanMin, v 42, p 234)
See Also:	Links to other databases for Paratsepinite-Ba : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas Search for Paratsepinite-Ba using:   Web webmineral.com [ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO] Visit our Advertisers for Paratsepinite-Ba : 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 Paratsepinite-Ba Mineral Data : Ask about Paratsepinite-Ba 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 Paratsepinite-Ba Specimen Label here : Paratsepinite-Ba (Ba,Na,K)2-x(Ti,Nb)2(Si4O12)(OH,O)2·4(H2O) Dana No: 60.1.3b.5 Strunz No: VIII/E.07-34 Locality:   Notes: