[Mineral Forums] [Minerals for Sale] [About Us] [En Espanol] [Mineral Gallery] Fabre Minerals - Europe's first Internet mineral dealer, on the web since 1996 General Osumilite-(Mg) Information(K,Na)(Mg,Fe++)2(Al,Fe+++)3(Si,Al)12O30 |
Molecular Weight = 1,015.74 gm |
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Potassium 2.89 % K 3.48 % K2O |
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Sodium 0.57 % Na 0.76 % Na2O |
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Magnesium 3.59 % Mg 5.95 % MgO |
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Aluminum 13.95 % Al 26.35 % Al2O3 |
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Iron 6.87 % Fe 3.54 % FeO / 5.90 % Fe2O3 |
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Silicon 24.89 % Si 53.24 % SiO2 |
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Oxygen 47.25 % O |
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______ ______ |
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100.00 % 99.21 % = TOTAL OXIDE |
K0.75Na0.25Mg1.5Fe2+0.5Al2.25Fe3+0.75Si9Al3O30 |
Approved IMA 1983 |
Historic province of Osumi in Sakkabira, Kyushu, Japan. Link to MinDat.org Location Data. |
Named for the locality and the composition. |
Osumilite-(Mg) + Pronunciation |
ICSD 202731 |
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PDF 30-942 |
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Osumilite-(Mg) Crystallographya:c = 1:1.40901 |
a = 10.117, c = 14.255, Z = 2; V = 1,263.58 Den(Calc)= 2.67 |
Hexagonal - Dihexagonal DipyramidalH-M Symbol (6/m 2/m 2/m) Space Group: P 6/mcc |
By Intensity(I/Io): 3.22(1), 4.11(0.6), 5.01(0.6), |
| Physical Properties of Osumilite-(Mg)None |
Brown, Green, Dark blue, Black. |
2.62 - 2.64, Average = 2.63 |
Translucent to Opaque |
Brittle - Generally displayed by glasses and most non-metallic minerals. |
5-6 - Between Apatite and Orthoclase |
Vitreous (Glassy) |
| Optical Properties of Osumilite-(Mg)CI meas= 0.022 (Excellent) - where the CI = (1-KPDmeas/KC) |
CI calc= 0.037 (Excellent) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2029,KPDmeas= 0.206,KC= 0.2107 Ncalc = 1.55 - 1.56 Uniaxial (+), w=1.5406, e=1.543, bire=0.0024. |
| Calculated Properties of Osumilite-(Mg)Bulk Density (Electron Density)=2.60 gm/cc |
note: Specific Gravity of Osumilite-(Mg) =2.63 gm/cc. Fermion Index = 0.01 |
Boson Index = 0.99 PEOsumilite-(Mg) = 3.77 barns/electron |
U=PEOsumilite-(Mg) x relectron= 9.80 barns/cc. |
GRapi = 41.16 (Gamma Ray American Petroleum Institute Units)
Estimated Radioactivity from Osumilite-(Mg) | Osumilite-(Mg) Classification63.02.01a.07 (63)Cyclosilicate Condensed Rings |
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(63.02)6-membered rings |
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(63.02.01a)Milarite - Osumilite group (Milarite - Osumilite subgroup) |
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09.CM.05 09 - SILICATES (Germanates) |
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09.C - Cyclosilicates |
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09.CM -[Si6O18]12- 6-membered double rings (sechser-Doppelringe) |
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| Other Osumilite-(Mg) InformationNAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
Links to other databases for Osumilite-(Mg) : |
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 Osumilite-(Mg) using: Visit our Advertisers for Osumilite-(Mg) : 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 Osumilite-(Mg) Mineral Data : Ask about Osumilite-(Mg) here : Print or Cut-and-Paste your Osumilite-(Mg) Specimen Label here :
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