Mineralogy Database

Megakalsilite Mineral Data

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General Megakalsilite 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: Hyperagpaitic pegmatite. (close to kalsilite; structure)
Help on IMA Status: IMA Status: Approved IMA 2002 (Dana # Added)
Help on Locality: Locality: Khibina alkaline massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named to reflect the large (MEGA) unit cell relative to kalsilite.
Help on Synonym: Synonym: IMA2001-008
 

Megakalsilite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.46768
Help on Cell Dimensions: Cell Dimensions: a = 18.104, c = 8.467, Z = 24; V = 2,403.31 Den(Calc)= 2.62
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): 3.09(1)(100,222), 2.612(0.7)(060), 1.24(0.6)(4.10.1,066,583),1.516(0.5)(145,660), 1.585(0.5)(282), 1.674(0.5)(173), 3.18(0.5)(141),
 

Physical Properties of Megakalsilite

Help on Color: Color: Colorless.
Help on Density: Density: 2.58
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Anhedral Grains - Granular minerals without the expression of crystal shapes
Help on Hardness: Hardness: 6 - Orthoclase
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Megakalsilite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.015 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.204,KPDmeas= 0.2072,KC= 0.2041
Ncalc = 1.53
Help on Optical Data: Optical Data: Uniaxial (-), e=1.531, w=1.538, bire=0.0070.
 

Calculated Properties of Megakalsilite

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

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

Estimated Radioactivity from Megakalsilite - barely detectable

 

Megakalsilite Classification

Help on  Dana Class: Dana Class: 76.02.01.07 (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 Megakalsilite Information

Help on References: References: NAME( AmMin, Vol 88, p 476) PHYS. PROP.(AmMin, Vol 88, p 476) OPTIC PROP.(AmMin, Vol 88, p 476)
Help on See Also: See Also: Links to other databases for Megakalsilite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Print or Cut-and-Paste your Megakalsilite Specimen Label here :

Megakalsilite

KAlSiO4
Dana No: 76.02.01.07 Strunz No: 09.FA.05
Locality:

 

Notes:

 

 
   
 


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