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Euclase Mineral Data |
General Euclase Information |
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BeAlSiO4(OH) | ||
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Molecular Weight = 145.08 gm | ||
Beryllium 6.21 % Be 17.24 % BeO | |||
Aluminum 18.60 % Al 35.14 % Al2O3 | |||
Silicon 19.36 % Si 41.41 % SiO2 | |||
Hydrogen 0.69 % H 6.21 % H2O | |||
Oxygen 55.14 % O | |||
______ ______ | |||
100.00 % 100.00 % = TOTAL OXIDE | |||
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BeAl(SiO4)(OH) | ||
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Hydrothermal, pegmatitic, and alluvial rocks. | ||
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Valid Species (Pre-IMA) 1792 | ||
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Orenburg district in the southern Urals, Russia. Link to MinDat.org Location Data. | ||
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From the Greek eu - "well" and klasis - "breaking." | ||
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Euclase ![]() |
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ICSD 202094 | ||
PDF 14-65 | |||
Euclase Image | |||
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Euclase Crystallography |
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a:b:c =0.3333:1:0.3231 | ||
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a = 4.763, b = 14.29, c = 4.618, Z = 4; beta = 100.3° V = 309.25 Den(Calc)= 3.12 | ||
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Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/a | ||
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By Intensity(I/Io): 7.15(1), 3.219(0.5), 3.836(0.35), | ||
Physical Properties of Euclase |
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{010} Perfect | ||
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Blue, Colorless, White, Light blue, Light green. | ||
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2.987 - 3.1, Average = 3.04 | ||
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Transparent to translucent | ||
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Brittle - Generally displayed by glasses and most non-metallic minerals. | ||
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Massive - Fibrous - Distinctly fibrous fine-grained forms. | ||
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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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7.5 - Garnet | ||
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Non-fluorescent. | ||
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Vitreous (Glassy) | ||
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white | ||
Optical Properties of Euclase |
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CI meas= 0.021 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= 0.045 (Good) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2113,KPDmeas= 0.2166,KC= 0.2214 Ncalc = 1.66 - 1.69 |
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Biaxial (+), a=1.652, b=1.655, g=1.671, bire=0.0190, 2V(Calc)=48, 2V(Meas)=50. Dispersion none. | ||
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colorless. | ||
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colorless. | ||
Calculated Properties of Euclase |
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Bulk Density (Electron Density)=3.02 gm/cc note: Specific Gravity of Euclase =3.04 gm/cc. |
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Fermion Index = 0.07 Boson Index = 0.93 |
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PEEuclase = 1.36 barns/electron U=PEEuclase x rElectron Density= 4.11 barns/cc. |
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GRapi = 0 (Gamma Ray American Petroleum Institute Units) Euclase is Not Radioactive |
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Euclase Classification |
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52.02.01.01 (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O | ||
(52.02)with cations in [4] and >[4] coordination | |||
(52.02.01)Euclase group | |||
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09.AE.10 09 - SILICATES (Germanates) | ||
09.A - Nesosilicates | |||
09.AE -Nesosilicates with additional (O,OH,F,H2O); | |||
Other Euclase Information |
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Links to other databases for Euclase : 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 - GeoScienceWorld 8 - Google Images 9 - Google Scholar 10 - Handbook of Mineralogy (MinSocAm) 11 - Handbook of Mineralogy (UofA) 12 - MinDAT 13 - Mineralienatlas (Deutsch) 14 - Online Mineral Museum 15 - Philatelic Mineralogy 16 - QUT Mineral Atlas 17 - Ruff.Info 18 - Scandinavian mineral gallery 19 - Tradeshop.com - The Rainbow of Gems 20 - WWW-MINCRYST Search for Euclase using: Visit our Advertisers for Euclase : Ask about Euclase here : Print or Cut-and-Paste your Euclase Specimen Label here :
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