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Okenite Mineral Data |
General Okenite Information |
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Ca3[Si6O15]•6(H2O) | ||
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Molecular Weight = 1,966.57 gm | ||
Calcium 20.38 % Ca 28.52 % CaO | |||
Silicon 25.71 % Si 55.00 % SiO2 | |||
Hydrogen 1.85 % H 16.49 % H2O | |||
Oxygen 52.07 % O | |||
______ ______ | |||
100.00 % 100.00 % = TOTAL OXIDE | |||
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Ca10Si18O46•18(H2O) | ||
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Secondary mineral from the alteration of basalts. | ||
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Valid Species (Pre-IMA) 1828 | ||
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Disko Island, Greenland. Poona, near Bombay, India. Link to MinDat.org Location Data. | ||
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Named for Lorenz Oken (1779-1851), German natural historian, Munich Germany. | ||
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Okenite ![]() |
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ICSD 31207 | ||
PDF 33-305 | |||
Okenite Image | |||
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Okenite Crystallography |
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a:b:c =1.331:1:3.0219 | ||
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a = 9.69, b = 7.28, c = 22, Z = 1; alpha = 97.5°, beta = 101.1°, gamma = 110.9° V = 1,410.54 Den(Calc)= 2.31 | ||
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Triclinic Space Group: P1 or P1 | ||
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By Intensity(I/Io): 21(1), 3.56(0.8), 8.8(0.8), | ||
Physical Properties of Okenite |
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{001} Good | ||
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White, Yellowish white, Bluish white. | ||
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2.3 - 2.33, Average = 2.31 | ||
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Transparent to Translucent | ||
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Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz). | ||
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Capillary - Very slender and long, like a thread or hair (e.g. millerite). | ||
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Fibrous - Crystals made up of fibers. | ||
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Spherical - Spherical, rounded aggregates. | ||
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5 - Apatite | ||
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Non-Fluorescent. | ||
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Pearly | ||
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white | ||
Optical Properties of Okenite |
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CI meas= 0.015 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.03 (Excellent) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2234,KPDmeas= 0.2268,KC= 0.2303 Ncalc = 1.53 - 1.54 |
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Biaxial (-), a=1.512-1.532, b=1.514-1.535, g=1.515-1.542, bire=0.0030-0.0100, 2V(Calc)=68-70, 2V(Meas)=60. Dispersion none. | ||
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colorless. | ||
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colorless. | ||
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colorless. | ||
Calculated Properties of Okenite |
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Bulk Density (Electron Density)=2.35 gm/cc note: Specific Gravity of Okenite =2.32 gm/cc. |
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Fermion Index = 0.01 Boson Index = 0.99 |
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PEOkenite = 3.48 barns/electron U=PEOkenite x rElectron Density= 8.20 barns/cc. |
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GRapi = 0 (Gamma Ray American Petroleum Institute Units) Okenite is Not Radioactive |
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Okenite Classification |
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72.03.02.05 (72)Phyllosilicate Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings | ||
(72.03)with 3-, 4-, or 5-membered rings and 8-membered rings | |||
(72.03.02)Tobermorite group (5- & 8-membered rings) | |||
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09.EA.40 09 - SILICATES (Germanates) | ||
09.E - Phyllosilicates | |||
09.EA -Single nets of tetrahedra with 4-, 5-, (6-), and 8-membered rings | |||
Other Okenite Information |
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NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8) | ||
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Links to other databases for Okenite : 1 - Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 - Athena 4 - EUROmin Project 5 - Ecole des Mines de Paris 6 - GeoScienceWorld 7 - Glendale Community College 8 - Google Images 9 - Google Scholar 10 - Handbook of Mineralogy (MinSocAm) 11 - Handbook of Mineralogy (UofA) 12 - MinDAT 13 - Mineralienatlas (Deutsch) 14 - Online Mineral Museum 15 - QUT Mineral Atlas 16 - Ruff.Info 17 - WWW-MINCRYST 18 - theimage Search for Okenite using: Visit our Advertisers for Okenite : Ask about Okenite here : Print or Cut-and-Paste your Okenite Specimen Label here :
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