General Oursinite Information![]() (Co,Mg)(H3O)2[(UO2)SiO4]2•3(H2O) |
![]() Molecular Weight = 871.78 gm |
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Magnesium 0.28 % Mg 0.46 % MgO |
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Uranium 54.61 % U 61.95 % UO2 |
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Cobalt 6.08 % Co 7.74 % CoO |
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Silicon 6.44 % Si 13.78 % SiO2 |
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Hydrogen 1.39 % H 12.40 % H2O |
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Oxygen 31.20 % O |
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100.00 % 96.33 % = TOTAL OXIDE |
![]() Co0.9Mg0.1(H3O)2(UO2)2(SiO4)2•3(H2O) |
![]() In the oxidation zones of uranium ores. |
![]() Approved IMA 1983 |
![]() Shikolobwe, Shava, Zaire. Link to MinDat.org Location Data. |
![]() Named from the French "oursin", sea urchin, in allusion to the radiating habit of the acicular crystals. |
![]() Oursinite + Pronunciation |
![]() | | Oursinite Image
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Oursinite Crystallography![]() a:b:c =0.7259:1:0.4017 |
![]() a = 12.74, b = 17.55, c = 7.05, Z = 4; V = 1,576.29 Den(Calc)= 3.67 |
![]() OrthorhombicSpace Group: Aba2,Abam |
![]() By Intensity(I/Io): 8.73(1), 2.853(0.9), 7.2(0.7), |
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| Physical Properties of Oursinite![]() {???} Good |
![]() Pale yellow. |
![]() 3.674 |
![]() Transparent to Translucent |
![]() Acicular - Occurs as needle-like crystals. |
![]() Aggregates - Made of numerous individual crystals or clusters. |
![]() Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite) |
![]() 3-3.5 - Calcite-Copper Penny |
![]() Vitreous (Glassy) |
| Optical Properties of Oursinite![]() CI meas= -0.177 (Poor) - where the CI = (1-KPDmeas/KC) |
CI calc= -0.178 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1738,KPDmeas= 0.1737,KC= 0.1475 Ncalc = 1.54 ![]() Biaxial (-), a=1.624, b=1.64, g=1.65, bire=0.0260, 2V(Calc)=76, 2V(Meas)=76. |
| Calculated Properties of Oursinite![]() Bulk Density (Electron Density)=3.25 gm/cc |
note: Specific Gravity of Oursinite =3.67 gm/cc. ![]() Fermion Index = 0.0073713435 |
Boson Index = 0.9926286565 ![]() PEOursinite =1,403.43 barns/electron |
U=PEOursinite x relectron=4,560.10 barns/cc. ![]() |
GRapi = 4,116,515.50 (Gamma Ray American Petroleum Institute Units)
Oursinite is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram. Estimated Maximum U.S. Postal Shipping Size
(10 mRem/hr limit, Unshielded 10 cm box)
7.39 ± 1.85 grams of pure Oursinite .
Weight of pure Oursinite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.67 gm/cc.* | Oursinite Classification![]() 53.03.01.07 (53)Nesosilicate Insular SiO4 Groups and Other Anions of Complex Cations |
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(53.03)with (UO2) |
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(53.03.01)Uranophane group |
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![]() 09.AK.10 09 - SILICATES (Germanates) |
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09.A - Nesosilicates |
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09.AK -Uranyl neso- and polysilicates |
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| Other Oursinite Information![]() NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
![]() Links to other databases for Oursinite : |
1 - Am. Min. Crystal Structure Database 2 - Athena 3 - EUROmin Project 4 - Ecole des Mines de Paris 5 - GeoScienceWorld 6 - Google Images 7 - Google Scholar 8 - Handbook of Mineralogy (MinSocAm) 9 - Handbook of Mineralogy (UofA) 10 - MinDAT 11 - Mineralienatlas (Deutsch) 12 - Online Mineral Museum 13 - QUT Mineral Atlas 14 - Ruff.Info 15 - Uranium Minerals Search for Oursinite using: Visit our Advertisers for Oursinite : A Bijoux Google Search for OursiniteAdam's Minerals Google Search for Oursinite Cape Minerals Google Search for Oursinite Dakota Matrix Minerals Google Search for Oursinite Excalibur Mineral Corp. Google Search for Oursinite Exceptional Minerals Google Search for Oursinite John Betts Fine Minerals Search for Oursinite McDougall Minerals Google Search for Oursinite Mineral News Website Link Rock and Mineral Shows Google Search for Oursinite Weinrich Minerals, Inc. Google Search for Oursinite Ask about Oursinite here : Print or Cut-and-Paste your Oursinite Specimen Label here :
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