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Majorite Mineral Data |
General Majorite Information |
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Mg3(Fe,Al,Si)2(SiO4)3 | ||
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Molecular Weight = 437.99 gm | ||
Magnesium 16.65 % Mg 27.61 % MgO | |||
Aluminum 3.70 % Al 6.98 % Al2O3 | |||
Iron 15.30 % Fe 21.88 % Fe2O3 | |||
Silicon 20.52 % Si 43.90 % SiO2 | |||
Oxygen 43.84 % O | |||
______ ______ | |||
100.00 % 100.37 % = TOTAL OXIDE | |||
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Mg3Fe3+1.2Al0.6Si0.2(SiO4)3 | ||
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Formed from low-calcium, high-aluminum pyroxene, olivine, and shock-induced glass, by high-pressure impact metamorphism in bolides. | ||
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Approved IMA 1970 | ||
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In the Coorara, Catherwood, Pampa del Infierno, Tenham, and Peace River chondritic meteorites. Link to MinDat.org Location Data. | ||
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Named for Alan Major, who assisted A.E. Ringwood in the high-pressure synthesis of garnet from pyroxene. | ||
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Majorite ![]() |
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ICSD 27373 | ||
PDF 25-843 | |||
Majorite Image | |||
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Majorite Crystallography |
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a = 11.524, Z = 8; V = 1,530.42 Den(Calc)= 3.80 | ||
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Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: I a3d | ||
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By Intensity(I/Io): 1.54(1), 2.58(1), 2.88(0.6), | ||
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Mouse |
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Physical Properties of Majorite |
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None | ||
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Yellow brown, Purple red. | ||
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4 | ||
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Transparent to Translucent | ||
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7-7.5 - Quartz-Garnet | ||
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Vitreous (Glassy) | ||
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white | ||
Optical Properties of Majorite |
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CI meas= 0.13 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= 0.084 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2105,KPDmeas= 0.2,KC= 0.2299 Ncalc = 1.87 - 1.92 |
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Isotropic, n=1.8. | ||
Calculated Properties of Majorite |
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Bulk Density (Electron Density)=3.74 gm/cc note: Specific Gravity of Majorite =3.80 gm/cc. |
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Fermion Index = 0.02 Boson Index = 0.98 |
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PEMajorite = 5.79 barns/electron U=PEMajorite x rElectron Density= 21.69 barns/cc. |
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GRapi = 0 (Gamma Ray American Petroleum Institute Units) Majorite is Not Radioactive |
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Majorite Classification |
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51.04.03a.05 (51)Nesosilicate Insular SiO4 Groups Only | ||
(51.04)with cations in [6] and >[6] coordination | |||
(51.04.03a)Garnet group (Pyralspite series) | |||
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09.AD.25 09 - SILICATES (Germanates) | ||
09.A - Nesosilicates | |||
09.AD -Nesosilicates without additional anions; | |||
Other Majorite Information |
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NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | ||
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Links to other databases for Majorite : 1 - Am. Min. Crystal Structure Database 2 - Athena 3 - EUROmin Project 4 - Ecole des Mines de Paris 5 - GeoScienceWorld 6 - Google Images 7 - Google Scholar 8 - Handbook of Mineralogy (MinSocAm) 9 - Handbook of Mineralogy (UofA) 10 - MinDAT 11 - Mineralienatlas (Deutsch) 12 - Online Mineral Museum 13 - QUT Mineral Atlas 14 - Ruff.Info Search for Majorite using: Visit our Advertisers for Majorite : Ask about Majorite here : Print or Cut-and-Paste your Majorite Specimen Label here :
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