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Katoite Mineral Data

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General Katoite Information

Help on Chemical  Formula: Chemical Formula: Ca3Al2(SiO4)3-x(OH)4x x=1.5-3
Help on Composition: Composition: Molecular Weight = 414.37 gm
   Calcium   29.02 %  Ca   40.60 % CaO
   Aluminum  13.02 %  Al   24.61 % Al2O3
   Silicon   10.17 %  Si   21.75 % SiO2
   Hydrogen   1.46 %  H    13.04 % H2O
   Oxygen    46.33 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca3Al2(SiO4)1.5(OH)6
Help on Environment: Environment: A hydrothermal mineral in cavities in a phonolitic lava flow that erupted through an argillaceous marl.
Help on IMA Status: IMA Status: Approved IMA 1984
Help on Locality: Locality: Campomorto quarry, near Montalto di Castro, Lazio, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Akira Kato, mineralogist of the National Science Museum, Tokyo, Japan.
Help on Name Pronunciation: Name Pronunciation: Katoite Say KATOITE
Help on Synonym: Synonym: Hydrogrossular
  ICSD 202315
  PDF 38-368
 

Katoite Image

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  Katoite

Comments: Pale yellow to colorless euhedral katoite crystals associated with dark brown andradite crystals.
Location: Wilui River, Russia. Scale: See Image.
© Rruff Database

Katoite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 12.358, Z = 8; V = 1,887.32 Den(Calc)= 2.92
Help on Crystal System: Crystal System: Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: I a3d
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.763(1), 2.004(0.58), 2.257(0.58),
 

Physical Properties of Katoite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless, Milky white.
Help on Density: Density: 2.76
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Hardness: Hardness: 5-6 - Between Apatite and Orthoclase
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Katoite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.014 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.041 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2164,KPDmeas= 0.229,KC= 0.2258
Ncalc = 1.62 - 1.66
Help on Optical Data: Optical Data: Isotropic, n=1.632.
 

Calculated Properties of Katoite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.78 gm/cc
note: Specific Gravity of Katoite =2.76 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0053642676
Boson Index = 0.9946357324
Help on Photoelectric: Photoelectric: PEKatoite = 4.32 barns/electron
U=PEKatoite x rElectron Density= 12.04 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Katoite is Not Radioactive
 

Katoite Classification

Help on  Dana Class: Dana Class: 51.04.03d.02 (51)Nesosilicate Insular SiO4 Groups Only
  (51.04)with cations in [6] and >[6] coordination
  (51.04.03d)Garnet group (Hydrogarnet)
 
51.04.03d.01 Hibschite Ca3Al2(SiO4)3-x(OH)4x(x=0.2-1.5) I a3d 4/m 3 2/m
 
51.04.03d.02 Katoite Ca3Al2(SiO4)3-x(OH)4xx=1.5-3 I a3d 4/m 3 2/m
Help on  Strunz Class: Strunz Class: 09.AD.25 09 - SILICATES (Germanates)
  09.A - Nesosilicates
  09.AD -Nesosilicates without additional anions;
 
09.AD.25 Almandine Fe3Al2(SiO4)3 I a3d 4/m 3 2/m
 
09.AD.25 Calderite (Mn,Ca)3(Fe,Al)2(SiO4)3 I a3d 4/m 3 2/m
 
09.AD.25 Andradite Ca3Fe2(SiO4)3 I a3d 4/m 3 2/m
 
09.AD.25 Goldmanite Ca3(V,Al,Fe)2(SiO4)3 I a3d 4/m 3 2/m
 
09.AD.25 Hibschite Ca3Al2(SiO4)3-x(OH)4x(x=0.2-1.5) I a3d 4/m 3 2/m
 
09.AD.25 Knorringite Mg3Cr2(SiO4)3 I a3d 4/m 3 2/m
 
09.AD.25 Grossular Ca3Al2(SiO4)3 I a3d 4/m 3 2/m
 
09.AD.25 Henritermierite Ca3(Mn,Al)2(SiO4)2(OH)4 I 41/acd 4/m 2/m 2/m
 
09.AD.25 Katoite Ca3Al2(SiO4)3-x(OH)4xx=1.5-3 I a3d 4/m 3 2/m
 
09.AD.25 Majorite Mg3(Fe,Al,Si)2(SiO4)3 I a3d 4/m 3 2/m
 
09.AD.25 Kimzeyite Ca3(Zr,Ti)2(Si,Al,Fe)3O12 I a3d 4/m 3 2/m
 
09.AD.25 Morimotoite Ca3TiFeSi3O12 I a3d 4/m 3 2/m
 
09.AD.25 Pyrope Mg3Al2(SiO4)3 I a3d 4/m 3 2/m
 
09.AD.25 Spessartine Mn3Al2(SiO4)3 I a3d 4/m 3 2/m
 
09.AD.25 Schorlomite Ca3(Ti,Fe,Al)2[(Si,Fe,Fe)O4]3 I a3d 4/m 3 2/m
 
09.AD.25 Uvarovite Ca3Cr2(SiO4)3 I a3d 4/m 3 2/m
 
09.AD.25 Wadalite Ca6Al5Si2O16Cl3 I 43d 4 3m
 
09.AD.25 Holtstamite! Ca3(Al,Mn)2(SiO4)2(OH)4 I 41/acd 4/m 2/m 2/m
 

Other Katoite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Katoite :
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
15 - WWW-MINCRYST

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Katoite

Ca3Al2(SiO4)3-x(OH)4x x=1.5-3
Dana No: 51.04.03d.02 Strunz No: 09.AD.25
Locality:

 

Notes:

 

 
   
 


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