|
Anhydrite Mineral Data + |
General Anhydrite Information |
|||
| CaSO4 | |||
| Molecular Weight = 136.14 gm | |||
| Calcium 29.44 % Ca 41.19 % CaO | |||
| Sulfur 23.55 % S 58.81 % SO3 | |||
| Oxygen 47.01 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Ca(SO4) | |||
| Sedimentary beds, gangue in ore veins, and in traprock zeolite occurrences. | |||
| Valid Species (Pre-IMA) 1795 | |||
| World wide occurrences where marine evaporite beds occur. Often interbedded with halite. Link to MinDat.org Location Data. | |||
| From the Greek anhydros, meaning "waterless" (In contrast to Gypsum, which contains water). | |||
| Calcium Sulfate | |||
| ICSD 16382 | |||
| PDF 37-1496 | |||
Anhydrite Image | |||
|
|
|
||
Anhydrite Crystallography |
|||
| a:b:c =0.9992:1:0.8916 | |||
| a = 6.991, b = 6.996, c = 6.238, Z = 4; V = 305.09 Den(Calc)= 2.96 | |||
| Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Amma | |||
| By Intensity(I/Io): 3.49(1), 2.849(0.35), 2.328(0.2), | |||
Mouse |
|
||
|
Mouse |
| ||
Physical Properties of Anhydrite |
|||
| [010] Perfect, [100] Perfect, [001] Good | |||
| Colorless, White, Bluish white, Violet white, Dark gray. | |||
| 2.96 - 2.98, Average = 2.97 | |||
| Transparent to Subtransparent to translucent | |||
| Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments. | |||
| Massive - Fibrous - Distinctly fibrous fine-grained forms. | |||
| Massive - Granular - Common texture observed in granite and other igneous rock. | |||
| Plumose - "Mica-like" minerals forming aggregates of plume-like forms. | |||
| 3.5 - Copper Penny | |||
| None. | |||
| Vitreous - Pearly | |||
| white | |||
Optical Properties of Anhydrite |
|||
| CI meas= -0.037 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= -0.04 (Good) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1983,KPDmeas= 0.1976,KC= 0.1906 |
|||
| Biaxial (+), a=1.569-1.573, b=1.574-1.579, g=1.609-1.618, bire=0.0400-0.0450, 2V(Calc)=44, 2V(Meas)=36-45. Dispersion r < v. | |||
| colorless. | |||
| colorless. | |||
| colorless. | |||
Calculated Properties of Anhydrite |
|||
relectron=2.97 gm/cc |
|||
| Fermion Index = 0.00238 Boson Index = 0.99762 |
|||
PEAnhydrite = 5.03 barns/electron |
|||
| GRapi = 0 (Gamma Ray American Petroleum Institute Units) Anhydrite is Not Radioactive |
|||
Anhydrite Classification |
|||
| 28.3.2.1 (28)Anhydrous Acid and Sulfates | |||
| (28.3)(A++) XO4 | |||
| (28.3.2)Dana Group | |||
| VI/A.08-50 VI - Sulfates,Chromates,Molybdates and Tungstates | |||
| VI/A - Waterfree sulfates [SO4]2- without unfamiliar anions. cations of very big size | |||
| VI/A.08 - Aphthitalite - Anhydrite series | |||
Other Anhydrite Information |
|||
| NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Heinrich65) | |||
| Links to other databases for Anhydrite : 1 -Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 - Applied Mineralogy 4 -Athena 5 - Crocoite.com Mineral Locations 6 - EUROmin Project 7 - Franklin Minerals(Dunn) 8 - Franklin Minerals(Palache) 9 - Glendale Community College 10 -Google Images 11 -Google Scholar 12 -Handbook of Mineralogy (UofA) 13 -MinDAT 14 -MinMax(Deutsch) 15 -MinMax(English) 16 - Mineral and Gemstone Kingdom 17 -Mineralienatlas (Deutsch) 18 - Minerals of Wisconsin 19 -QUT Mineral Atlas 20 - Scandinavian mineral gallery 21 -University of Colorado - Mineral Structure Data 22 - University of Manchester - Mineral Structure 23 -University of Minnesota 24 - WWW-MINCRYST 25 -theimage 26 -École des Mines de Paris Search for Anhydrite using: Visit our Advertisers for Anhydrite : Translate Anhydrite Mineral Data : Ask about Anhydrite here : Print or Cut-and-Paste your Anhydrite Specimen Label here :
|
|||