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Chrysoberyl Mineral Data + |
General Chrysoberyl Information |
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| BeAl2O4 | |||
| Molecular Weight = 126.97 gm | |||
| Beryllium 7.10 % Be 19.70 % BeO | |||
| Aluminum 42.50 % Al 80.30 % Al2O3 | |||
| Oxygen 50.40 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| BeAl2O4 | |||
| Granitic pegmatite dikes. | |||
| Valid Species (Pre-IMA) 1790 | |||
| Takowaja, Russia. Link to MinDat.org Location Data. | |||
| From the Greek chrysos - "golden" and the mineral beryl. | |||
| Alexandrite - green | |||
| ICSD 62501 | |||
| PDF 11-448 | |||
Chrysoberyl Image | |||
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Chrysoberyl Crystallography |
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| a:b:c =0.5823:1:0.4707 | |||
| a = 5.476, b = 9.404, c = 4.427, Z = 4; V = 227.97 Den(Calc)= 3.70 | |||
| Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pmnb | |||
| By Intensity(I/Io): 3.24(1), 2.091(0.9), 1.619(0.8), | |||
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Physical Properties of Chrysoberyl |
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| [110] Distinct, [010] Imperfect, [???] Imperfect | |||
| Blue green, Brown, Brownish green, Green, Gray. | |||
| 3.5 - 3.84, Average = 3.67 | |||
| Transparent to translucent | |||
| Brittle - Generally displayed by glasses and most non-metallic minerals. | |||
| Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). | |||
| Tabular - Form dimensions are thin in one direction. | |||
| Twinning Common - Crystals are usually twinned. | |||
| 8.5 - Chrysoberyl | |||
| Non-fluorescent. | |||
| Vitreous (Glassy) | |||
| white | |||
Optical Properties of Chrysoberyl |
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| CI meas= 0.044 (Good) - where the CI = (1-KPDmeas/KC) CI calc= 0.052 (Good) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2024,KPDmeas= 0.2041,KC= 0.2135 |
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| Biaxial (+), a=1.745, b=1.748, g=1.754, bire=0.0090, 2V(Calc)=72, 2V(Meas)=45. Dispersion none. | |||
| none. | |||
Calculated Properties of Chrysoberyl |
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relectron=3.58 gm/cc |
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| Fermion Index = 0.07121 Boson Index = 0.92879 |
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PEChrysoberyl = 1.31 barns/electron |
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| GRapi = 0 (Gamma Ray American Petroleum Institute Units) Chrysoberyl is Not Radioactive |
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Chrysoberyl Classification |
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| 7.2.9.1 (7)Multiple Oxides | |||
| (7.2)(A+ B++)2 X4 Spinel group | |||
| (7.2.9)Dana Group | |||
| IV/B.07-10 IV - Oxides | |||
| IV/B - Oxides with metal : oxygen = 3:4 (spinel type M3O4 and related) | |||
| IV/B.07 - Chrysoberyl - Swedenburgite series | |||
Other Chrysoberyl Information |
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| NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Mason68) | |||
| Links to other databases for Chrysoberyl : 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 -Google Images 9 -Google Scholar 10 -Handbook of Mineralogy (UofA) 11 -MinDAT 12 -MinMax(Deutsch) 13 -MinMax(English) 14 - Mineral and Gemstone Kingdom 15 -Mineralienatlas (Deutsch) 16 -NSDL Reciprocal Net (JAVA) 17 - Philatelic Mineralogy 18 -QUT Mineral Atlas 19 - Scandinavian mineral gallery 20 - Tradeshop.com - The Rainbow of Gems 21 - WWW-MINCRYST 22 -École des Mines de Paris Search for Chrysoberyl using: Visit our Advertisers for Chrysoberyl : Translate Chrysoberyl Mineral Data : Ask about Chrysoberyl here : Print or Cut-and-Paste your Chrysoberyl Specimen Label here :
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