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Spinel Mineral Data + |
General Spinel Information |
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| MgAl2O4 | |||
| Molecular Weight = 142.27 gm | |||
| Magnesium 17.08 % Mg 28.33 % MgO | |||
| Aluminum 37.93 % Al 71.67 % Al2O3 | |||
| Oxygen 44.98 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| MgAl2O4 | |||
| Metamorphic mineral found in limestone and dolomite marbles and very-low silica and alkali igneous rocks (e.g. peridotites). | |||
| Valid Species (Pre-IMA) 1546 | |||
| Gem gravels of Sri Lanka and other notable locations. Link to MinDat.org Location Data. | |||
| Of uncertain origin, possibly derived from Latin, spina, for "thorn" in allusion to sharply-pointed crystals. | |||
| Balas ruby - Red | |||
| ICSD 79000 | |||
| PDF 21-1152 | |||
| Rubicelle | |||
| Ruby spinal | |||
Spinel Image | |||
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Spinel Crystallography |
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| a = 8.08, Z = 8; V = 527.51 Den(Calc)= 3.58 | |||
| Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F d3m | |||
| By Intensity(I/Io): 2.436(1), 2.021(0.7), 1.429(0.6), | |||
Mouse |
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Physical Properties of Spinel |
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| None | |||
| Colorless, Red, Blue, Green, Brown. | |||
| 3.57 - 3.72, Average = 3.64 | |||
| Transparent to translucent to opaque | |||
| Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern. | |||
| Euhedral Crystals - Occurs as well-formed crystals showing good external form. | |||
| Massive - Granular - Common texture observed in granite and other igneous rock. | |||
| 8 - Topaz | |||
| Sometimes Fluorescent. | |||
| Vitreous (Glassy) | |||
| Nonmagnetic | |||
| grayish white | |||
Optical Properties of Spinel |
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| CI meas= -0.017 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= -0.035 (Excellent) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2123,KPDmeas= 0.2085,KC= 0.205 |
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| Isotropic, n=1.72-1.8. | |||
Calculated Properties of Spinel |
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relectron=3.59 gm/cc |
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| Fermion Index = 0.0173 Boson Index = 0.9827 |
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PESpinel = 1.48 barns/electron |
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| GRapi = 0 (Gamma Ray American Petroleum Institute Units) Spinel is Not Radioactive |
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Spinel Classification |
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| 7.2.1.1 (7)Multiple Oxides | |||
| (7.2)(A+ B++)2 X4 Spinel group | |||
| (7.2.1)(Aluminum subgroup) | |||
| IV/B.01-10 IV - Oxides | |||
| IV/B - Oxides with metal : oxygen = 3:4 (spinel type M3O4 and related), Aluminat-Spinels | |||
| IV/B.01 - Spinel group, Spinel - Gahnite series | |||
Other Spinel Information |
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| NAME( Sinkankas66) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | |||
| Links to other databases for Spinel : 1 -Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 - Amethyst Galleries' Mineral Gallery 4 - Applied Mineralogy 5 -Athena 6 - CalTech Mineral Spectroscopy 7 - Crocoite.com Mineral Locations 8 - Franklin Minerals(Dunn) 9 - Franklin Minerals(Palache) 10 -Google Images 11 -Google Scholar 12 -Handbook of Mineralogy (UofA) 13 - HyperPhysics 14 -MinDAT 15 -MinMax(Deutsch) 16 -MinMax(English) 17 - Mineral and Gemstone Kingdom 18 -Mineralienatlas (Deutsch) 19 - Minerals of Wisconsin 20 -NSDL Reciprocal Net (JAVA) 21 -QUT Mineral Atlas 22 - Tradeshop.com - The Rainbow of Gems 23 -University of Colorado - Mineral Structure Data 24 -University of Texas at Austin 25 -theimage Search for Spinel using: Visit our Advertisers for Spinel : Translate Spinel Mineral Data : Ask about Spinel here : Print or Cut-and-Paste your Spinel Specimen Label here :
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