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Cebollite Mineral Data
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General Cebollite Information
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 Chemical Formula: |
Ca5Al2(SiO4)3(OH)4 |
| Composition: |
Molecular Weight = 598.63 gm |
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Calcium 33.47 % Ca 46.84 % CaO |
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Aluminum 9.01 % Al 17.03 % Al2O3 |
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Silicon 14.07 % Si 30.11 % SiO2 |
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Hydrogen 0.67 % H 6.02 % H2O |
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Oxygen 42.76 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Ca5Al2(SiO4)3(OH)4 |
| Environment: |
Alteration product of melilite. |
| IMA Status: |
Valid Species (Pre-IMA) 1914 |
| Locality: |
Cebolla Creek, Gunnison Co., Colorado Link to MinDat.org Location Data. |
| Name Origin: |
Named after its locality. |
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Cebollite Image |
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Images:
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Cebollite Crystallography
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| Crystal System: |
Orthorhombic Space Group: Unk |
| X Ray Diffraction: |
By Intensity(I/Io): 2.73(1), 2.88(0.9), 2.59(0.7), |
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Physical Properties of Cebollite
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| Color: |
Colorless, Greenish gray, White, Light brown. |
| Density: |
2.96 |
| Diaphaneity: |
Subtranslucent to opaque |
| Habit: |
Fibrous - Crystals made up of fibers. |
| Hardness: |
5 - Apatite |
| Luminescence: |
Non-fluorescent. |
| Luster: |
Vitreous - Dull |
| Magnetism: |
Nonmagnetic |
| Streak: |
white |
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Optical Properties of Cebollite
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| Gladstone-Dale: |
CI meas= 0.053 (Good) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.2053,KC= 0.2167
Ncalc = 1.64 |
| Optical Data: |
Biaxial (+), a=1.595, b=1.6, g=1.628, bire=0.0330 |
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Calculated Properties of Cebollite
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| Electron Density: |
Bulk Density (Electron Density)=2.97 gm/cc
note: Specific Gravity of Cebollite =2.96 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0072311321
Boson Index = 0.9927688679 |
| Photoelectric: |
PECebollite = 4.90 barns/electron
U=PECebollite x rElectron Density= 14.55 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Cebollite is Not Radioactive |
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Cebollite Classification
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| Dana Class: |
78.01.01.01 (78)Unclassified silicates |
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(78.01)possible nesosilicates |
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(78.01.01)Dana Group |
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78.01.01.01 Cebollite Ca5Al2(SiO4)3(OH)4 Unk Ortho |
| Strunz Class: |
09.BB.10 09 - SILICATES (Germanates) |
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09.B - Sorosilicates |
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09.BB -Si2O7 groups, without non-tetrahedral anions; |
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09.BB.10 Akermanite Ca2MgSi2O7 P 421m 4 2m |
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09.BB.10 Cebollite Ca5Al2(SiO4)3(OH)4 Unk Ortho |
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09.BB.10 Gugiaite Ca2BeSi2O7 P 421m 4 2m |
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09.BB.10 Gehlenite Ca2Al(AlSi)O7 P 421m 4 2m |
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09.BB.10 Jeffreyite (Ca,Na)2(Be,Al)Si2(O,OH)7 C 2221 2 2 2 |
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09.BB.10 Hardystonite Ca2ZnSi2O7 P 421m 4 2m |
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09.BB.10 Melilite (Ca,Na)2(Al,Mg,Fe)(Si,Al)2O7 P 421m 4 2m |
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09.BB.10 Okayamalite! Ca2B2SiO7 P 421m 4 2m |
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Other Cebollite Information
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| References: |
NAME( Ford32) PHYS. PROP.(Ford32) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
| See Also: |
Links to other databases for Cebollite :
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
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Print or Cut-and-Paste your Cebollite Specimen Label here :
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Cebollite
Ca5Al2(SiO4)3(OH)4
Dana No: 78.01.01.01 Strunz No: 09.BB.10
Locality:
Notes:
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