Mineralogy Database

Kalsilite Mineral Data

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General Kalsilite Information

Help on Chemical  Formula: Chemical Formula: KAlSiO4
Help on Composition: Composition: Molecular Weight = 158.16 gm
   Potassium  24.72 %  K    29.78 % K2O
   Aluminum   17.06 %  Al   32.23 % Al2O3
   Silicon    17.76 %  Si   37.99 % SiO2
   Oxygen     40.46 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: KAlSiO4
Help on Environment: Environment: Embedded grains in silica-undersaturated lavas and nepheline-bearing igneous rocks.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1942
Help on Locality: Locality: Kyambogo crater, Bynyaryguru field, Lake Mafuru, Uganda Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the compostion, Kallium (Potassium), Aluminum, and Silicon. K,AL,SI.
Help on Name Pronunciation: Name Pronunciation: Kalsilite + Pronunciation Say KALSILITE
Help on Synonym: Synonym: ICSD 34350
  PDF 11-579

Kalsilite Image

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Comments: Small, hair-like crystals of kalsilite on crystals of phlogopite and smaller crystals of analcime and fluorapatite.
Location: San Venanzo, Tern, Italy. Scale: Picture size 5 mm.
© John Veevaert

Kalsilite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.68819
Help on Cell Dimensions: Cell Dimensions: a = 5.157, c = 8.706, Z = 2; V = 200.51 Den(Calc)= 2.62
Help on Crystal System: Crystal System: Trigonal - Ditrigonal Pyramidal H-M Symbol (3m) Space Group: P 31c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.12(1), 2.58(0.5), 3.97(0.45),

Physical Properties of Kalsilite

Help on Cleavage: Cleavage: {1010} Indistinct, {0001} Indistinct
Help on Color: Color: Colorless, Gray, Gray white, White.
Help on Density: Density: 2.59 - 2.625, Average = 2.6
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Hardness: Hardness: 6 - Orthoclase
Help on Luster: Luster: Vitreous - Greasy
Help on Streak: Streak: white

Optical Properties of Kalsilite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.01 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.005 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2052,KPDmeas= 0.2061,KC= 0.2041
Ncalc = 1.53 - 1.54
Help on Optical Data: Optical Data: Uniaxial (-), e=1.532-1.537, w=1.538-1.543, bire=0.0060.

Calculated Properties of Kalsilite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.58 gm/cc
note: Specific Gravity of Kalsilite =2.62 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0085165557
Boson Index = 0.9914834443
Help on Photoelectric: Photoelectric: PEKalsilite = 3.65 barns/electron
U=PEKalsilite x relectron= 9.44 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 351.79 (Gamma Ray American Petroleum Institute Units)
Concentration of Kalsilite per GRapi unit = 0.28 (%)

Estimated Radioactivity from Kalsilite - barely detectable


Kalsilite Classification

Help on  Dana Class: Dana Class: (76)Tectosilicate Al-Si Framework
  (76.02)Feldspathoids and related species
  (76.02.01)Nepheline group Kalsilite KAlSiO4 P 31c 3m Nepheline (Na,K)AlSiO4 P 63 6 Trikalsilite (K,Na)AlSiO4 P 63 6 Panunzite (K,Na)AlSiO4 P 63 6 Kaliophilite KAlSiO4 P 6322 6 2 2 Yoshiokaite (Ca8-(x/2)[](x/2)Al16-xSixO32) P 3 3 Megakalsilite! KAlSiO4 P 63 6
Help on  Strunz Class: Strunz Class: 09.FA.05 09 - SILICATES (Germanates)
  09.F - Tektosilicates without Zeolitic H2O
  09.FA -Tektosilicates without additional non-tetrahedral anions, (Al,B):Si = 1:1
09.FA.05 Nepheline (Na,K)AlSiO4 P 63 6
09.FA.05 Kaliophilite KAlSiO4 P 6322 6 2 2
09.FA.05 Kalsilite KAlSiO4 P 31c 3m
09.FA.05 Panunzite (K,Na)AlSiO4 P 63 6
09.FA.05 Trikalsilite (K,Na)AlSiO4 P 63 6
09.FA.05 Megakalsilite! KAlSiO4 P 63 6
09.FA.05 Yoshiokaite (Ca8-(x/2)[](x/2)Al16-xSixO32) P 3 3

Other Kalsilite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.82,p276-279,1997) OPTIC PROP.(Am.Min.,Vol.82,p276-279,1997)
Help on See Also: See Also: Links to other databases for Kalsilite :
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.FA.05





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