Cebollite Mineral Data

General Cebollite Information

Chemical Formula:

Ca5Al2(SiO4)3(OH)4

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

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.

Cebollite Image

Images:

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

Crystal System:

OrthorhombicSpace Group: Unk

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.73(1), 2.88(0.9), 2.59(0.7),

Physical Properties of Cebollite

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

Optical Properties of Cebollite

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

Calculated Properties of Cebollite

Electron Density:

Bulk Density (Electron Density)=2.97 gm/cc
note: Specific Gravity of Cebollite =2.96 gm/cc.

Fermion Index:

Fermion Index = 0.0072311321
Boson Index = 0.9927688679

Photoelectric:

PE_Cebollite= 4.90 barns/electron
U=PE_Cebollite x rElectron Density= 14.55 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Cebollite is Not Radioactive

Cebollite Classification

Dana Class:

78.01.01.01 (78)Unclassified silicates

(78.01)possible nesosilicates

(78.01.01)Dana Group

78.01.01.01 Cebollite Ca5Al2(SiO4)3(OH)4 Unk Ortho

Strunz Class:

09.BB.10 09 - SILICATES (Germanates)

09.B - Sorosilicates

09.BB -Si2O7 groups, without non-tetrahedral anions;

09.BB.10 Akermanite Ca2MgSi2O7 P 42₁m 4 2m

09.BB.10 Cebollite Ca5Al2(SiO4)3(OH)4 Unk Ortho

09.BB.10 Gugiaite Ca2BeSi2O7 P 42₁m 4 2m

09.BB.10 Gehlenite Ca2Al(AlSi)O7 P 42₁m 4 2m

09.BB.10 Jeffreyite (Ca,Na)2(Be,Al)Si2(O,OH)7 C 222₁ 2 2 2

09.BB.10 Hardystonite Ca2ZnSi2O7 P 42₁m 4 2m

09.BB.10 Melilite (Ca,Na)2(Al,Mg,Fe)(Si,Al)2O7 P 42₁m 4 2m

09.BB.10 Okayamalite! Ca2B2SiO7 P 42₁m 4 2m

Other Cebollite Information

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

Search for Cebollite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Cebollite :

A Bijoux Google Search for Cebollite
Adam's Minerals Google Search for Cebollite
Cape Minerals Google Search for Cebollite
Dakota Matrix Minerals Google Search for Cebollite
Excalibur Mineral Corp. Google Search for Cebollite
Exceptional Minerals Google Search for Cebollite
John Betts Fine Minerals Search for Cebollite
McDougall Minerals Google Search for Cebollite
Mineral News Website Link
Rock and Mineral Shows Google Search for Cebollite
Weinrich Minerals, Inc. Google Search for Cebollite

Ask about Cebollite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Cebollite Specimen Label here :

Cebollite

Ca5Al2(SiO4)3(OH)4
Dana No: 78.01.01.01 Strunz No: 09.BB.10
Locality:

Notes: