[Content and History] [Recent Issues] [Back Issues] [Subscriptions] [Contacts] See Also: [Diamond Crystals] [Excalibur Minerals] [Hudson Institute] [Minerals on CDROM] Mineral News was founded some twenty years ago and has developed a following of avid mineral collectors seeking timely information about new finds and other items of interest to the collector community. Articles are solicited from collector and scientific authors. General Paratsepinite-Ba Information(Ba,Na,K)2-x(Ti,Nb)2(Si4O12)(OH,O)2•4(H2O) |
Molecular Weight = 628.25 gm |
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Potassium 1.43 % K 1.72 % K2O |
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Barium 10.06 % Ba 11.23 % BaO |
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Sodium 1.35 % Na 1.83 % Na2O |
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Strontium 1.67 % Sr 1.98 % SrO |
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Titanium 10.75 % Ti 17.93 % TiO2 |
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Manganese 0.96 % Mn 1.24 % MnO |
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Niobium 8.13 % Nb 11.64 % Nb2O5 |
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Silicon 18.33 % Si 39.21 % SiO2 |
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Hydrogen 1.45 % H 12.96 % H2O |
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Oxygen 45.87 % O |
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______ ______ |
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100.00 % 99.73 % = TOTAL OXIDE |
Ba0.46Na0.37K0.23Sr0.12Mn2+0.11Ti1.41Nb0.55Si4.1O12.39(OH)1.8O0.2·3.62(H2O) |
Hydrothermal mineral in an alkaline pegmatite. Labuntsovite group; structure determined. |
Approved IMA 2002 (Dana # Added) |
Lepkhe-Nelm Mountain, Lovozero massif, Kola Peninsula, Russia. Link to MinDat.org Location Data. |
Named for the relationship to tsepinite-Na. |
IMA2002-006 |
| | Paratsepinite-Ba Image
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Paratsepinite-Ba Crystallographya:b:c =1.0392:1:1.1214 |
a = 14.551, b = 14.001, c = 15.702, Z = 8; beta = 117.58° V = 2,835.43 Den(Calc)= 2.94 |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m |
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),
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| Physical Properties of Paratsepinite-BaNone |
Brown. |
2.88 |
Transparent |
Brittle - Uneven - Very brittle fracture producing uneven fragments. |
Aggregates - Made of numerous individual crystals or clusters. |
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). |
5 - Apatite |
Vitreous (Glassy) |
white |
| Optical Properties of Paratsepinite-BaCI 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 Ncalc = 1.73 - 1.75 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-BaBulk Density (Electron Density)=2.80 gm/cc |
note: Specific Gravity of Paratsepinite-Ba =2.88 gm/cc. Fermion Index = 0.04 |
Boson Index = 0.96 PEParatsepinite-Ba = 58.01 barns/electron |
U=PEParatsepinite-Ba x relectron= 162.52 barns/cc. |
GRapi = 20.11 (Gamma Ray American Petroleum Institute Units)
Estimated Radioactivity from Paratsepinite-Ba | Paratsepinite-Ba Classification60.01.03b.05 (60)Cyclosilicate Four-Membered Rings |
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(60.01)as Titanosilicates |
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(60.01.03b)Labuntsovite Group (Vuoriyarvite subgroup Monoclinic [Cm]) |
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09.CE.30i 09 - SILICATES (Germanates) |
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09.C - Cyclosilicates |
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09.CE -[Si4O12]8- 4-membered single rings (vierer-Einfachringe), |
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| Other Paratsepinite-Ba InformationNAME( CanMin, v 42, p 234) PHYS. PROP.(CanMin, v 42, p 234) OPTIC PROP.(CanMin, v 42, p 234) |
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 10 - Ruff.Info Search for Paratsepinite-Ba using: Visit our Advertisers for Paratsepinite-Ba : AA Mineral SpecimensB & L Fine Minerals Crystalarium.com Dan Weinrich Fine Minerals Dan Weinrich Auctions Dakota Matrix Desert Winds Gems and Minerals Excalibur Minerals Exceptional Minerals Fabre Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club Wrights Rock Shop Translate Paratsepinite-Ba Mineral Data : Ask about Paratsepinite-Ba here : Print or Cut-and-Paste your Paratsepinite-Ba Specimen Label here :
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