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General Grossite Information |
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 Chemical Formula: |
CaAl4O7 | ||
| Composition: |
Molecular Weight = 260.00 gm | ||
| Calcium 15.41 % Ca 21.57 % CaO | |||
| Aluminum 41.51 % Al 78.43 % Al2O3 | |||
| Oxygen 43.08 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
CaAl4O7 | ||
| Environment: |
Argillaceous limestones metamorphosed at high temperature and low pressure. | ||
| IMA Status: |
Approved IMA 1994 | ||
| Locality: |
Hatrurim Fm, Israel. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for Shulamit Gross (1923- ), Geological Survey of Israel, Jerusalem, Israel, who noted the species in the Hatrurim Formation, Israel. | ||
| Name Pronunciation: |
Grossite  |
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| Synonym: |
ICSD 27264 | ||
| IMA1993-052 | |||
| PDF 46-1475 | |||
Search for Grossite Images | |||
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Images:
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Grossite Crystallography |
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| Axial Ratios: |
a:b:c =1.4523:1:0.6112 | ||
| Cell Dimensions: |
a = 12.94, b = 8.91, c = 5.446, Z = 4; beta = 107.01° V = 600.43 Den(Calc)= 2.88 | ||
| Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c | ||
| X Ray Diffraction: |
By Intensity(I/Io): 3.515(1), 4.46(0.43), 2.605(0.36), | ||
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Crystal Structure:
Mouse |
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Physical Properties of Grossite |
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| Color: |
Colorless, White. | ||
| Density: |
2.88 | ||
| Diaphaneity: |
Transparent | ||
| Luster: |
Vitreous (Glassy) | ||
| Streak: |
white | ||
Optical Properties of Grossite |
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| Gladstone-Dale: |
CI meas= -0.052 (Good) - where the CI = (1-KPDmeas/KC) CI calc= -0.052 (Good) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2185,KPDmeas= 0.2185,KC= 0.2076 Ncalc = 1.6 |
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| Optical Data: |
Biaxial (+), a=1.6178, b=1.6184, g=1.6516, bire=0.0338, 2V(Calc)=16, 2V(Meas)=15.5. | ||
Calculated Properties of Grossite |
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| Electron Density: |
Bulk Density (Electron Density)=2.84 gm/cc note: Specific Gravity of Grossite =2.88 gm/cc. |
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| Fermion Index: |
Fermion Index = 0.0004148588 Boson Index = 0.9995851412 |
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| Photoelectric: |
PEGrossite = 3.12 barns/electron U=PEGrossite x rElectron Density= 8.85 barns/cc. |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Grossite is Not Radioactive |
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Grossite Classification |
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| Dana Class: |
07.03.02.01 (07)Multiple Oxides | ||
| (07.03)with 2+ and higher charged cations | |||
| (07.03.02)Dana Group | |||
| Strunz Class: |
04.CC.15 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate | ||
| 04.C - Metal:Oxygen = 2:3, 3:5, and Similar | |||
| 04.CC -With large and medium-sized cations | |||
Other Grossite Information |
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| References: |
NAME( AntBidBlaNic3) PHYS. PROP.(37th List of New Min.,Min. Mag.,1996) OPTIC PROP.(37th List of New Min.,Min. Mag.,1990) | ||
| See Also: |
Links to other databases for Grossite : 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 Grossite using: Visit our Advertisers for Grossite : A Bijoux Google Search for GrossiteAdam's Minerals Google Search for Grossite Cape Minerals Google Search for Grossite Dakota Matrix Minerals Google Search for Grossite Excalibur Mineral Corp. Google Search for Grossite Exceptional Minerals Google Search for Grossite John Betts Fine Minerals Search for Grossite McDougall Minerals Google Search for Grossite Mineral News Website Link Rock and Mineral Shows Google Search for Grossite Weinrich Minerals, Inc. Google Search for Grossite Ask about Grossite here : Print or Cut-and-Paste your Grossite Specimen Label here :
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