|
Staurolite Mineral Data + |
General Staurolite Information |
|||
| (Fe++,Mg)2Al9(Si,Al)4O20(O,OH)4 | |||
| Molecular Weight = 811.89 gm | |||
| Lithium 0.09 % Li 0.18 % Li2O | |||
| Magnesium 0.30 % Mg 0.50 % MgO | |||
| Aluminum 28.91 % Al 54.63 % Al2O3 | |||
| Iron 9.63 % Fe 12.39 % FeO | |||
| Silicon 13.49 % Si 28.86 % SiO2 | |||
| Hydrogen 0.29 % H 2.55 % H2O | |||
| Oxygen 47.30 % O | |||
| ______ ______ | |||
| 100.00 % 99.11 % = TOTAL OXIDE | |||
| Fe2+1.4Li0.1Mg0.1Al8.6Si3.9Al0.1O21.7(OH)2.3 | |||
| Metamorphosed aluminous sedimentary rocks. | |||
| Valid Species (Pre-IMA) 1792 | |||
| Common world wide occurrences. Link to MinDat.org Location Data. | |||
| From the Greek, stauros - "cross" and lithos - "stone" in allusion to the common cross shaped twins of the crystals. | |||
| ICSD 67446 | |||
| PDF 41-1484 | |||
| Staurotide | |||
Staurolite Image | |||
|
|
|
||
Staurolite Crystallography |
|||
| a:b:c =0.4741:1:0.3405 | |||
| a = 7.88, b = 16.62, c = 5.66, Z = 2; beta = 90° V = 741.27 Den(Calc)= 3.64 | |||
| Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m | |||
| By Intensity(I/Io): 2.693(1), 3.012(1), 2.372(0.8), | |||
Mouse |
|
||
|
Mouse |
| ||
Physical Properties of Staurolite |
|||
| [010] Distinct | |||
| Brownish yellow, Brownish black, Yellow brown, Dark brown, Reddish brown. | |||
| 3.65 - 3.77, Average = 3.71 | |||
| Translucent to opaque | |||
| Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces. | |||
| Tabular - Form dimensions are thin in one direction. | |||
| Twinning Common - Crystals are usually twinned. | |||
| 7-7.5 - Quartz-Garnet | |||
| Non-fluorescent. | |||
| Vitreous - Dull | |||
| gray | |||
Optical Properties of Staurolite |
|||
| CI meas= 0.025 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= 0.006 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2053,KPDmeas= 0.2014,KC= 0.2066 |
|||
| Biaxial (+), a=1.736-1.747, b=1.74-1.754, g=1.745-1.762, bire=0.0090-0.0150, 2V(Calc)=84-88, 2V(Meas)=88. Dispersion weak to moderate, r > v. | |||
| colorless, pale yellow, or yellowish red. | |||
| colorless, pale yellow, or yellowish red. | |||
| light yellow, orange yellow, or hyacinth red. | |||
Calculated Properties of Staurolite |
|||
relectron=3.59 gm/cc |
|||
| Fermion Index = 0.00893 Boson Index = 0.99107 |
|||
PEStaurolite = 4.22 barns/electron |
|||
| GRapi = 0 (Gamma Ray American Petroleum Institute Units) Staurolite is Not Radioactive |
|||
Staurolite Classification |
|||
| 52.2.3.1 (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O | |||
| (52.2)with cations in [4] and >[4] coordination | |||
| (52.2.3)Dana Group | |||
| VIII/B.03-10 VIII - Silicates | |||
| VIII/B - Nesosubsilicates, with anions unfamiliar to tetraheders, cations of octahedral and tetrahedral orientation [4/6] | |||
| VIII/B.03 - Staurolite - Gerstmannite series | |||
Other Staurolite Information |
|||
| NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Heinrich65) | |||
| Links to other databases for Staurolite : 1 -Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 - Applied Mineralogy 4 -Athena 5 - CalTech Mineral Spectroscopy 6 - Crocoite.com Mineral Locations 7 - EUROmin Project 8 - Glendale Community College 9 -Google Images 10 -Google Scholar 11 -Handbook of Mineralogy (MinSocAm) 12 -Handbook of Mineralogy (UofA) 13 - HyperPhysics 14 -MinDAT 15 -MinMax(Deutsch) 16 -MinMax(English) 17 -Mineralienatlas (Deutsch) 18 - Minerals in Thin Section-University of North Carolina 19 -Minerals in Thin Sections-Humboldt State 20 - Minerals of Wisconsin 21 -QUT Mineral Atlas 22 - Scandinavian mineral gallery 23 - Thin Sections - Brock University 24 - UCLA - Petrography Thin-Sections 25 - WWW-MINCRYST 26 -theimage 27 -École des Mines de Paris Search for Staurolite using: Visit our Advertisers for Staurolite : Translate Staurolite Mineral Data : Ask about Staurolite here : Print or Cut-and-Paste your Staurolite Specimen Label here :
|
|||