Mineralogy Database

Kilchoanite Mineral Data

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General Kilchoanite Information

Help on Chemical  Formula: Chemical Formula: Ca3Si2O7
Help on Composition: Composition: Molecular Weight = 288.40 gm
   Calcium  41.69 %  Ca   58.33 % CaO
   Silicon  19.48 %  Si   41.67 % SiO2
   Oxygen   38.83 %  O
           ______        ______ 
           100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca3(Si2O7)
Help on Environment: Environment: Retrograde replacement of rankinite.
Help on IMA Status: IMA Status: Approved IMA 1961
Help on Locality: Locality: Kilchoan, Ardnamurchan, Scotland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Kilchoanite + Pronunciation Say KILCHOANITE
Help on Synonym: Synonym: ICSD 63499
  PDF 29-370

Kilchoanite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =2.2436:1:4.3123
Help on Cell Dimensions: Cell Dimensions: a = 11.42, b = 5.09, c = 21.95, Z = 8; V = 1,275.91 Den(Calc)= 3.00
Help on Crystal System: Crystal System: Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: I2cm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.89(1), 2.68(0.95), 3.07(0.9),

Physical Properties of Kilchoanite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless.
Help on Density: Density: 2.99
Help on Diaphaneity: Diaphaneity: Transparent
Help on Streak: Streak: white

Optical Properties of Kilchoanite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.037 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.034 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2162,KPDmeas= 0.2169,KC= 0.2092
Ncalc = 1.63
Help on Optical Data: Optical Data: Biaxial (+), a=1.647, b=1.649, g=1.65, bire=0.0030, 2V(Calc)=70, 2V(Meas)=60. Dispersion r > v.
Help on Pleochroism (x): Pleochroism (x): anomalous.
Help on Pleochroism (y): Pleochroism (y): anomalous.
Help on Pleochroism (z): Pleochroism (z): anomalous.

Calculated Properties of Kilchoanite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.00 gm/cc
note: Specific Gravity of Kilchoanite =3.00 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0098448395
Boson Index = 0.9901551605
Help on Photoelectric: Photoelectric: PEKilchoanite = 5.85 barns/electron
U=PEKilchoanite x rElectron Density= 17.53 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Kilchoanite is Not Radioactive

Kilchoanite Classification

Help on  Dana Class: Dana Class: (58)Sorosilicate Insular, Mixed, Single, and Larger Tetrahedral Groups
  (58.03)with insular single and triple groups (n=1,3)
  (58.03.02)Dana Group Kilchoanite Ca3Si2O7 I2cm mm2
Help on  Strunz Class: Strunz Class: 09.BJ.45 09 - SILICATES (Germanates)
  09.B - Sorosilicates
  09.BJ -Sorosilicates with Si3O10, Si4O11, etc
09.BJ.45 Kilchoanite Ca3Si2O7 I2cm mm2

Other Kilchoanite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Kilchoanite :
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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Dana No: Strunz No: 09.BJ.45





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