Cebollite Mineral Data

General Cebollite Information

Help on Chemical  Formula: Chemical Formula: Ca5Al2(SiO4)3(OH)4
Help on Composition: Composition: Molecular Weight = 598.63 gm
   Calcium   33.47 %  Ca   46.84 % CaO
   Aluminum   9.01 %  Al   17.03 % Al2O3
   Silicon   14.07 %  Si   30.11 % SiO2
   Hydrogen   0.67 %  H     6.02 % H2O
   Oxygen    42.76 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca5Al2(SiO4)3(OH)4
Help on Environment: Environment: Alteration product of melilite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1914
Help on Locality: Locality: Cebolla Creek, Gunnison Co., Colorado Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its locality.
 

Cebollite Image

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Cebollite

Comments: Green to white fibrous coating of cebollite on granular iron stained quartz.
Location: Cebola Creek, Gunnison County, Colorado, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Cebollite Crystallography

Help on Crystal System: Crystal System: OrthorhombicSpace Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.73(1), 2.88(0.9), 2.59(0.7),
 

Physical Properties of Cebollite

Help on Color: Color: Colorless, Greenish gray, White, Light brown.
Help on Density: Density: 2.96
Help on Diaphaniety: Diaphaniety: Subtranslucent to opaque
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Hardness: Hardness: 5 - Apatite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Dull
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: white
 

Optical Properties of Cebollite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.053 (Good) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.2053,KC= 0.2167
Help on Optical Data: Optical Data: Biaxial (+), a=1.595, b=1.6, g=1.628, bire=0.0330
 

Calculated Properties of Cebollite

Help on Electron Density: Electron Density:

relectron=2.97 gm/cc
note: rCebollite =2.96 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00723
Boson Index = 0.99277
Help on Photoelectric: Photoelectric:

PECebollite = 4.90 barns/electron
U=PECebollite x relectron= 14.55 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Cebollite is Not Radioactive

 

Cebollite Classification

Help on  Dana Class: Dana Class: 78.1.1.1 (78)Unclassified silicates
  (78.1)possible nesosilicates
  (78.1.1)Dana Group
 
78.1.1.1 Cebollite Ca5Al2(SiO4)3(OH)4 Unk Ortho
Help on  Strunz Class: Strunz Class: VIII/C.03-30 VIII - Silicates
  VIII/C - Sorosilicates, with [Si2O7]6-, without anions unfamiliar to tetraheders
  VIII/C.03 - Rankinite - Cebollite series
 
VIII/C.03-10 Rankinite Ca3Si2O7 P 21/a 2/m
 
VIII/C.03-20 Kilchoanite Ca3Si2O7 I2cm mm2
 
VIII/C.03-30 Cebollite Ca5Al2(SiO4)3(OH)4 Unk Ortho
 
VIII/C.03-58 Manganokukisvumite! Na6MnTi4Si8O28·4(H2O) Pccn 2/m 2/m 2/m
 

Other Cebollite Information

Help on References: References: NAME( Ford32) PHYS. PROP.(Ford32) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Cebollite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (MinSocAm) 8 -Handbook of Mineralogy (UofA) 9 -MinDAT 10 -MinMax(Deutsch) 11 -MinMax(English) 12 -Mineralienatlas (Deutsch) 13 -QUT Mineral Atlas 14 -École des Mines de Paris

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Cebollite

Ca5Al2(SiO4)3(OH)4
Dana No: 78.1.1.1 Strunz No: VIII/C.03-30
Locality:

 

Notes:

 

 
   
 
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