|
Hectorite Mineral Data + |
General Hectorite Information |
|||
| 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 | |||
|
|
|
||
Hectorite Crystallography |
|||
| 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 |
|||
| [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 |
|||
| 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 |
|||
| Biaxial (-), a=1.49, b=1.5, g=1.52, bire=0.0300 | |||
| colorless. | |||
| colorless. | |||
| colorless. | |||
Calculated Properties of Hectorite |
|||
relectron=2.50 gm/cc |
|||
| Fermion Index = 0.03146 Boson Index = 0.96854 |
|||
PEHectorite = 1.56 barns/electron |
|||
| GRapi = 0 (Gamma Ray American Petroleum Institute Units) Hectorite is Not Radioactive |
|||
Hectorite Classification |
|||
| 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 |
|||
| 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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (MinSocAm) 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 -École des Mines de Paris Search for Hectorite using: Visit our Advertisers for Hectorite : Translate Hectorite Mineral Data : Ask about Hectorite here : Print or Cut-and-Paste your Hectorite Specimen Label here :
|
|||