Trikalsilite Mineral Data + Say TRIKALSILITE


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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 IMA Status: IMA Status: Valid Species (Pre-IMA) 1957
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Synonym: Synonym: ICSD 40445
  PDF 12-197
 

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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 - PyramidalH-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),
Click Here for Large Trikalsilite Structure Window Crystal Structure:

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Bonaccorsi E , Merlino S , Pasero M , Neues Jahrbuch fur Mineralogie, Monatshefte , 1988 (1988) p.559-567, Trikalsilite: its structural relationships with nepheline and tetraskalsilite, Locality: Near Mt. Nyiragongo, Virunga volcanic field, North Kivu, Zaire

 

Physical Properties of Trikalsilite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless.
Help on Density: Density: 2.63
Help on Diaphaniety: Diaphaniety: 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:

relectron=2.60 gm/cc
note: rTrikalsilite =2.64 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00873
Boson Index = 0.99127
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)

Estimated Radioactivity from Trikalsilite - barely detectable

 

Trikalsilite Classification

Help on  Dana Class: Dana Class: 76.2.1.3 (76)Tectosilicate Al-Si Framework
  (76.2)Feldspathoids and related species
  (76.2.1)Nepheline group
 
76.2.1.1 Kalsilite KAlSiO4 P 31c 3m
 
76.2.1.2 Nepheline (Na,K)AlSiO4 P 63 6
 
76.2.1.3 Trikalsilite (K,Na)AlSiO4 P 63 6
 
76.2.1.4 Panunzite (K,Na)AlSiO4 P 63 6
 
76.2.1.5 Kaliophilite KAlSiO4 P 6322 6 2 2
 
76.2.1.6 Yoshiokaite (Ca8-(x/2)[](x/2)Al16-xSixO32) P 3 3
 
76.2.1.7 Megakalsilite! KAlSiO4 P 63 6
Help on  Strunz Class: Strunz Class: VIII/J.02-30 VIII - Silicates
  VIII/J - Tectosilicates (network) without anions unfamiliar to the tetraheders
  VIII/J.02 - Nepheline - Yoshiokaite series
 
VIII/J.02-10 Nepheline (Na,K)AlSiO4 P 63 6
 
VIII/J.02-20 Kalsilite KAlSiO4 P 31c 3m
 
VIII/J.02-25 Megakalsilite! KAlSiO4 P 63 6
 
VIII/J.02-30 Trikalsilite (K,Na)AlSiO4 P 63 6
 
VIII/J.02-40 Panunzite (K,Na)AlSiO4 P 63 6
 
VIII/J.02-50 Kaliophilite KAlSiO4 P 6322 6 2 2
 
VIII/J.02-60 Yoshiokaite (Ca8-(x/2)[](x/2)Al16-xSixO32) P 3 3
 
VIII/J.02-70 Malinkoite! NaBSiO4 P 63 6
 

Other Trikalsilite Information

Help on References: References: 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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (MinSocAm) 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 - WWW-MINCRYST 14 -École des Mines de Paris

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Trikalsilite

(K,Na)AlSiO4
Dana No: 76.2.1.3 Strunz No: VIII/J.02-30
Locality:

 

Notes:

 

 
   
 
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