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Hectorite Mineral Data + |
General Hectorite Information |
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| Na0,3(Mg,Li)3Si4O10(OH)2 | |||
| Molecular Weight = 383.25 gm | |||
| Sodium 2.40 % Na 3.23 % Na2O | |||
| Lithium 0.54 % Li 1.17 % Li2O | |||
| Magnesium 17.12 % Mg 28.39 % MgO | |||
| Silicon 29.31 % Si 62.71 % SiO2 | |||
| Hydrogen 0.53 % H 4.70 % H2O | |||
| Oxygen 50.10 % O | |||
| ______ ______ | |||
| 100.00 % 100.21 % = TOTAL OXIDE | |||
| Na0.4Mg2.7Li0.3Si4O10(OH)2 | |||
| Clay mineral from altered volcanic tuff ash with a high silica content related to hot spring activity. Smectite group mineral. | |||
| Valid Species (Pre-IMA) 1936 | |||
| Company No. 1 mine, 3 miles south of Hector, San Bernardino Co., California. Link to MinDat.org Location Data. | |||
| Named after it's locality. | |||
Hectorite Image | |||
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Hectorite Crystallography |
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| a:b:c =0.5718:1:1.7429 | |||
| a = 5.25, b = 9.18, c = 16, Z = 3; beta = 99° V = 761.63 Den(Calc)= 2.51 | |||
| Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m | |||
| By Intensity(I/Io): 1.53(1), 4.58(1), 15.8(0.8), | |||
Physical Properties of Hectorite |
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| [001] Perfect | |||
| White. | |||
| 2 - 3, Average = 2.5 | |||
| Translucent to Opaque | |||
| Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern. | |||
| Aggregates - Made of numerous individual crystals or clusters. | |||
| 1-2 - Between Talc and Gypsum | |||
| Fluorescent. | |||
| Earthy (Dull) | |||
| white | |||
Optical Properties of Hectorite |
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| CI meas= 0.055 (Good) - where the CI = (1-KPDmeas/KC) CI calc= 0.058 (Good) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2005,KPDmeas= 0.2013,KC= 0.2129 |
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| Biaxial (-), a=1.49, b=1.5, g=1.52, bire=0.0300 | |||
| colorless. | |||
| colorless. | |||
| colorless. | |||
Calculated Properties of Hectorite |
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relectron=2.50 gm/cc |
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| Fermion Index = 0.03146 Boson Index = 0.96854 |
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PEHectorite = 1.56 barns/electron |
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| GRapi = 0 (Gamma Ray American Petroleum Institute Units) Hectorite is Not Radioactive |
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Hectorite Classification |
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| 71.3.1b.4 (71)Phyllosilicate Sheets of Six-Membered Rings | |||
| (71.3)with 2:1 clays | |||
| (71.3.1b)Smectite group (Trioctahedral Smectites) | |||
| VIII/H.20-10 VIII - Silicates | |||
| VIII/H - Phyllosilicates (layered) Mica like with [Si4O10]4- and related groups | |||
| VIII/H.20 - Hectorite - Zincsilite series | |||
Other Hectorite Information |
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| NAME( MinRec) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | |||
| Links to other databases for Hectorite : 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 Hectorite using: Visit our Advertisers for Hectorite : AA Mineral SpecimensB & L Fine Minerals Dan Weinrich Fine Minerals Dan Weinrich Auctions Excalibur Minerals Exceptional Minerals Fabre Minerals Greenside Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club MineralsWeb Fine Minerals The GeoZone Wrights Rock Shop Translate Hectorite Mineral Data : Ask about Hectorite here : Print or Cut-and-Paste your Hectorite Specimen Label here :
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