[Newest Minerals] [Minerals for Sale] [Educational Articles] [About Us] [Image Gallery] John Betts - Fine Minerals Classic minerals, out-of-print books & magazines, plus informative articles for collectors General Spadaite InformationMgSiO2(OH)2•(H2O) (?) |
Molecular Weight = 136.42 gm |
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Magnesium 17.82 % Mg 29.54 % MgO |
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Silicon 20.59 % Si 44.04 % SiO2 |
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Hydrogen 2.96 % H 26.41 % H2O |
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Oxygen 58.64 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
Mg(SiO2)(OH)2•(H2O) |
Found replacing tactite minerals. |
Valid Species (Pre-IMA) 1843 |
Capo di Bove, near Rome, Italy. Link to MinDat.org Location Data. |
Named for Lavino Spada (De Medici) (1801-1863), Italian politicioan and amateur mineralogist. |
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Spadaite Crystallography Orthorhombic |
| Physical Properties of SpadaiteNone |
Colorless, Cream, Pinkish. |
2.2 |
Translucent to subtranslucent |
Amorphous - No crystalline form or imitative shape. |
Massive - Uniformly indistinguishable crystals forming large masses. |
2.5 - Finger Nail |
Non-fluorescent. |
Vitreous - Dull |
Nonmagnetic |
white |
| Optical Properties of SpadaiteCI meas= -0.004 (Superior) - where the CI = (1-KPDmeas/KC) |
KPDmeas= 0.2414,KC= 0.2405 Ncalc = 1.53 Biaxial (+), a=1.521, b=1.525-1.53, g=1.545, bire=0.0240 |
none. |
none. |
none. |
| Calculated Properties of SpadaiteBulk Density (Electron Density)=2.26 gm/cc |
note: Specific Gravity of Spadaite =2.20 gm/cc. Fermion Index = 0.02 |
Boson Index = 0.98 PESpadaite = 1.25 barns/electron |
U=PESpadaite x rElectron Density= 2.83 barns/cc. GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Spadaite is Not Radioactive | Spadaite Classification78.07.14.01 (78)Unclassified silicates |
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(78.07)wholly unclassified silicates |
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(78.07.14)Dana Group |
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09.EC.45 09 - SILICATES (Germanates) |
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09.E - Phyllosilicates |
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09.EC -Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets |
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| Other Spadaite InformationNAME( Dana8) PHYS. PROP.(Dana) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
Links to other databases for Spadaite : |
1 - Am. Min. Crystal Structure Database 2 - Athena 3 - EUROmin Project 4 - Ecole des Mines de Paris 5 - Google Images 6 - Google Scholar 7 - Handbook of Mineralogy (MinSocAm) 8 - Handbook of Mineralogy (UofA) 9 - MinDAT 10 - MinMax(Deutsch) 11 - MinMax(English) 12 - Mineralienatlas (Deutsch) 13 - QUT Mineral Atlas 14 - Ruff.Info Search for Spadaite using: Visit our Advertisers for Spadaite : 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 Spadaite Mineral Data : Ask about Spadaite here : Print or Cut-and-Paste your Spadaite Specimen Label here :
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