Mineralogy Database

Trikalsilite Mineral Data

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General Trikalsilite Information

Help on Chemical  Formula: Chemical Formula: (K,Na)AlSiO4
Help on Composition: Composition: Molecular Weight = 154.14 gm
   Potassium  19.02 %  K    22.92 % K2O
   Sodium      3.73 %  Na    5.03 % Na2O
   Aluminum   17.51 %  Al   33.08 % Al2O3
   Silicon    18.22 %  Si   38.98 % SiO2
   Oxygen     41.52 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K0.75Na0.25AlSiO4
Help on Environment: Environment: In lava.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1957
Help on Locality: Locality: From the Kabfumu volcanic flow, between the Mt. Mikeno and Mt. Nyiragongo volcanos, Kivu Province, Congo (Zaire). Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For the length of the [100] axis, three times that of kalsilite.
Help on Name Pronunciation: Name Pronunciation: Trikalsilite + Pronunciation Say TRIKALSILITE
Help on Synonym: Synonym: ICSD 40445
  PDF 12-197
 

Trikalsilite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.55622
Help on Cell Dimensions: Cell Dimensions: a = 15.35, c = 8.538, Z = 18; V = 1,742.22 Den(Calc)= 2.64
Help on Crystal System: Crystal System: Hexagonal - Pyramidal H-M Symbol (6) Space Group: P 63
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.076(1), 3.05(0.95), 2.558(0.45),
 

Physical Properties of Trikalsilite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless.
Help on Density: Density: 2.63
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Hardness: Hardness: 6 - Orthoclase
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Trikalsilite

Help on Optical Data: Optical Data: NCalc= 1.54 - from Gladstone-Dale relationship (KC = 0.204) where Ncalc=Dcalc*KC+1
NCalc= 1.54 - from Gladstone-Dale relationship (KC = 0.204) where Ncalc=Dmeas*KC+1
 

Calculated Properties of Trikalsilite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.60 gm/cc
note: Specific Gravity of Trikalsilite =2.64 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0087314594
Boson Index = 0.9912685406
Help on Photoelectric: Photoelectric: PETrikalsilite = 3.17 barns/electron
U=PETrikalsilite x relectron= 8.26 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 270.67 (Gamma Ray American Petroleum Institute Units)
Concentration of Trikalsilite per GRapi unit = 0.37 (%)

Estimated Radioactivity from Trikalsilite - barely detectable

 

Trikalsilite Classification

Help on  Dana Class: Dana Class: 76.02.01.03 (76)Tectosilicate Al-Si Framework
  (76.02)Feldspathoids and related species
  (76.02.01)Nepheline group
 
76.02.01.01 Kalsilite KAlSiO4 P 31c 3m
 
76.02.01.02 Nepheline (Na,K)AlSiO4 P 63 6
 
76.02.01.03 Trikalsilite (K,Na)AlSiO4 P 63 6
 
76.02.01.04 Panunzite (K,Na)AlSiO4 P 63 6
 
76.02.01.05 Kaliophilite KAlSiO4 P 6322 6 2 2
 
76.02.01.06 Yoshiokaite (Ca8-(x/2)[](x/2)Al16-xSixO32) P 3 3
 
76.02.01.07 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 Trikalsilite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Trikalsilite :
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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Trikalsilite

(K,Na)AlSiO4
Dana No: 76.02.01.03 Strunz No: 09.FA.05
Locality:

 

Notes:

 

 
   
 


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