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Zoisite Mineral Data |
General Zoisite Information |
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Ca2Al3(SiO4)3(OH) = Ca2AlAl2(SiO4)(Si2O7)O(OH) | ||
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Molecular Weight = 454.36 gm | ||
Calcium 17.64 % Ca 24.68 % CaO | |||
Aluminum 17.82 % Al 33.66 % Al2O3 | |||
Silicon 18.54 % Si 39.67 % SiO2 | |||
Hydrogen 0.22 % H 1.98 % H2O | |||
Oxygen 45.78 % O | |||
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100.00 % 100.00 % = TOTAL OXIDE | |||
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Ca2Al3Si3O12(OH) | ||
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Metamorphic and pegmatite rocks. | ||
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Valid Species (Pre-IMA) 1805 | ||
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Rauris and Saualpe, Austria. Link to MinDat.org Location Data. | ||
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Named after the Austrian natural scientist, Siegmund Zois (1747-1819). | ||
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Zoisite ![]() |
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Anyolite - green | ||
ICSD 66924 | |||
PDF 13-562 | |||
Tanzanite - blue | |||
Thulite - red | |||
Zoisite Image | |||
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Zoisite Crystallography |
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a:b:c =2.9103:1:1.81 | ||
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a = 16.24, b = 5.58, c = 10.1, Z = 4; V = 915.25 Den(Calc)= 3.30 | ||
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Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pnmc | ||
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By Intensity(I/Io): 2.69(1), 2.87(0.65), 4.03(0.5), | ||
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Physical Properties of Zoisite |
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{001} Perfect | ||
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Gray, Apple green, Brown, Blue, Rose red. | ||
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3.3 | ||
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Transparent to subtranslucent | ||
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Even - Flat surfaces (not cleavage) fractured in an even pattern. | ||
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Columnar - Forms columns | ||
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Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). | ||
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Striated - Parallel lines on crystal surface or cleavage face. | ||
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6.5 - Pyrite | ||
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Non-fluorescent. | ||
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Vitreous - Pearly | ||
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white | ||
Optical Properties of Zoisite |
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CI meas= -0.01 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= -0.01 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2128,KPDmeas= 0.2128,KC= 0.2108 Ncalc = 1.7 |
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Biaxial (+), a=1.696-1.7, b=1.696-1.702, g=1.702-1.718, bire=0.0060-0.0180, 2V(Calc)=0-40, 2V(Meas)=0-70. Dispersion relatively strong. | ||
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colorless or pale pink. | ||
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colorless or colorless. | ||
Calculated Properties of Zoisite |
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Bulk Density (Electron Density)=3.28 gm/cc note: Specific Gravity of Zoisite =3.30 gm/cc. |
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Fermion Index = 0.0091183238 Boson Index = 0.9908816762 |
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PEZoisite = 3.40 barns/electron U=PEZoisite x rElectron Density= 11.17 barns/cc. |
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GRapi = 0 (Gamma Ray American Petroleum Institute Units) Zoisite is Not Radioactive |
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Zoisite Classification |
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58.02.01b.01 (58)Sorosilicate Insular, Mixed, Single, and Larger Tetrahedral Groups | ||
(58.02)with cations in [6] and higher coordination; single and double groups (n=1,2) | |||
(58.02.01b)Epidote group (Zoisite subgroup) | |||
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09.BG.10 09 - SILICATES (Germanates) | ||
09.B - Sorosilicates | |||
09.BG -Sorosilicates with mixed SiO4 and Si2O7 groups; | |||
Other Zoisite Information |
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Links to other databases for Zoisite : 1 - Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 - Athena 4 - CalTech Mineral Spectroscopy 5 - EUROmin Project 6 - Ecole des Mines de Paris 7 - Franklin Minerals(Palache) 8 - GeoScienceWorld 9 - Glendale Community College 10 - Google Images 11 - Google Scholar 12 - Handbook of Mineralogy (MinSocAm) 13 - Handbook of Mineralogy (UofA) 14 - HyperPhysics 15 - MinDAT 16 - Mineralienatlas (Deutsch) 17 - Online Mineral Museum 18 - Philatelic Mineralogy 19 - QUT Mineral Atlas 20 - Ruff.Info 21 - Scandinavian mineral gallery 22 - Tradeshop.com - The Rainbow of Gems 23 - UCLA - Petrography Thin-Sections 24 - University of Colorado - Mineral Structure Data 25 - WWW-MINCRYST Search for Zoisite using: Visit our Advertisers for Zoisite : Ask about Zoisite here : Print or Cut-and-Paste your Zoisite Specimen Label here :
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