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Vermiculite Mineral Data + |
General Vermiculite Information |
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| (Mg,Fe++,Al)3(Al,Si)4O10(OH)2·4(H2O) | |||
| Molecular Weight = 504.19 gm | |||
| Magnesium 8.68 % Mg 14.39 % MgO | |||
| Aluminum 23.01 % Al 43.48 % Al2O3 | |||
| Iron 9.97 % Fe 12.82 % FeO | |||
| Silicon 5.57 % Si 11.92 % SiO2 | |||
| Hydrogen 2.00 % H 17.87 % H2O | |||
| Oxygen 50.77 % O | |||
| ______ ______ | |||
| 100.00 % 100.48 % = TOTAL OXIDE | |||
| Mg1.8Fe2+0.9Al4.3SiO10(OH)2·4(H2O) | |||
| Valid Species (Pre-IMA) 1824 | |||
| Link to MinDat.org Location Data. | |||
| From the Latin vermiculus, "little worm." | |||
Vermiculite Image | |||
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Vermiculite Crystallography |
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| a:b:c =0.5698:1:1.6218 | |||
| a = 5.26, b = 9.23, c = 14.97, Z = 2; beta = 96.82° V = 721.65 Den(Calc)= 2.32 | |||
| Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m | |||
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Mouse |
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Physical Properties of Vermiculite |
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| [001] Perfect | |||
| Colorless, Green, Gray white, Yellow brown. | |||
| 2.3 - 2.7, Average = 2.5 | |||
| Translucent | |||
| Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern. | |||
| Lamellar - Thin laminae producing a lamellar structure. | |||
| Scaly - Morphology like fish scales. | |||
| 1.5-2 - Talc-Gypsum | |||
| Vitreous - Dull | |||
| greenish white | |||
Optical Properties of Vermiculite |
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| CI meas= 0.026 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= -0.05 (Good) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2398,KPDmeas= 0.2225,KC= 0.2284 |
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| Biaxial (-), a=1.525-1.561, b=1.545-1.581, g=1.545-1.581, bire=0.0200, 2V(Calc)=0, 2V(Meas)=0-8. Dispersion weak, r > v. | |||
| colorless or pale green. | |||
| pale brown, yellowish green, or brownish green. | |||
| pale brown, yellowish green, or brownish green. | |||
Calculated Properties of Vermiculite |
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relectron=2.51 gm/cc |
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| Fermion Index = 0.01363 Boson Index = 0.98637 |
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PEVermiculite = 4.01 barns/electron |
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| GRapi = 0 (Gamma Ray American Petroleum Institute Units) Vermiculite is Not Radioactive |
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Vermiculite Classification |
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| 71.2.2d.3 (71)Phyllosilicate Sheets of Six-Membered Rings | |||
| (71.2)with 2:1 Layers | |||
| (71.2.2d)Mica Group (Hydromica subgroup) | |||
| VIII/H.21-10 VIII - Silicates | |||
| VIII/H - Phyllosilicates (layered) Mica like with [Si4O10]4- and related groups | |||
| VIII/H.21 - Vermiculite series | |||
Other Vermiculite Information |
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| NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Heinrich65) | |||
| Links to other databases for Vermiculite : 1 - Alkali-Nuts(English) 2 - Alkali-Nuts(Francais) 3 -Am. Min. Crystal Structure Database 4 - Amethyst Galleries' Mineral Gallery 5 - Applied Mineralogy 6 -Athena 7 - Crocoite.com Mineral Locations 8 - EUROmin Project 9 -Google Images 10 -Google Scholar 11 -Handbook of Mineralogy (MinSocAm) 12 -Handbook of Mineralogy (UofA) 13 -MinDAT 14 -MinMax(Deutsch) 15 -MinMax(English) 16 -Mineralienatlas (Deutsch) 17 -QUT Mineral Atlas 18 - Scandinavian mineral gallery 19 - WWW-MINCRYST 20 -École des Mines de Paris Search for Vermiculite using: Visit our Advertisers for Vermiculite : Translate Vermiculite Mineral Data : Ask about Vermiculite here : Print or Cut-and-Paste your Vermiculite Specimen Label here :
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