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Trikalsilite Mineral Data
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General Trikalsilite Information
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 Chemical Formula: |
(K,Na)AlSiO4 |
| Composition: |
Molecular Weight = 154.14 gm |
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Potassium 19.02 % K 22.92 % K2O |
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Sodium 3.73 % Na 5.03 % Na2O |
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Aluminum 17.51 % Al 33.08 % Al2O3 |
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Silicon 18.22 % Si 38.98 % SiO2 |
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Oxygen 41.52 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
K0.75Na0.25AlSiO4 |
| Environment: |
In lava. |
| IMA Status: |
Valid Species (Pre-IMA) 1957 |
| Locality: |
From the Kabfumu volcanic flow, between the Mt. Mikeno and Mt. Nyiragongo volcanos, Kivu Province, Congo (Zaire). Link to MinDat.org Location Data. |
| Name Origin: |
For the length of the [100] axis, three times that of kalsilite. |
| Name Pronunciation: |
Trikalsilite + Pronunciation  |
| Synonym: |
ICSD 40445 |
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PDF 12-197 |
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Trikalsilite Crystallography
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| Axial Ratios: |
a:c = 1:0.55622 |
| Cell Dimensions: |
a = 15.35, c = 8.538, Z = 18; V = 1,742.22 Den(Calc)= 2.64 |
| Crystal System: |
Hexagonal - Pyramidal H-M Symbol (6) Space Group: P 63 |
| X Ray Diffraction: |
By Intensity(I/Io): 3.076(1), 3.05(0.95), 2.558(0.45), |
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Physical Properties of Trikalsilite
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| Cleavage: |
None |
| Color: |
Colorless. |
| Density: |
2.63 |
| Diaphaneity: |
Transparent |
| Fracture: |
Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments. |
| Hardness: |
6 - Orthoclase |
| Luster: |
Vitreous (Glassy) |
| Streak: |
white |
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Optical Properties of Trikalsilite
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| 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 |
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Calculated Properties of Trikalsilite
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| Electron Density: |
Bulk Density (Electron Density)=2.60 gm/cc
note: Specific Gravity of Trikalsilite =2.64 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0087314594
Boson Index = 0.9912685406 |
| Photoelectric: |
PETrikalsilite = 3.17 barns/electron
U=PETrikalsilite x relectron= 8.26 barns/cc.
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| Radioactivity: |
GRapi = 270.67 (Gamma Ray American Petroleum Institute Units)
Concentration of Trikalsilite per GRapi unit = 0.37 (%)
Estimated Radioactivity from Trikalsilite  - barely detectable
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Trikalsilite Classification
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| Dana Class: |
76.02.01.03 (76)Tectosilicate Al-Si Framework |
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(76.02)Feldspathoids and related species |
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(76.02.01)Nepheline group |
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76.02.01.01 Kalsilite KAlSiO4 P 31c 3m |
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76.02.01.02 Nepheline (Na,K)AlSiO4 P 63 6 |
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76.02.01.03 Trikalsilite (K,Na)AlSiO4 P 63 6 |
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76.02.01.04 Panunzite (K,Na)AlSiO4 P 63 6 |
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76.02.01.05 Kaliophilite KAlSiO4 P 6322 6 2 2 |
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76.02.01.06 Yoshiokaite (Ca8-(x/2)[](x/2)Al16-xSixO32) P 3 3 |
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76.02.01.07 Megakalsilite! KAlSiO4 P 63 6 |
| Strunz Class: |
09.FA.05 09 - SILICATES (Germanates) |
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09.F - Tektosilicates without Zeolitic H2O |
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09.FA -Tektosilicates without additional non-tetrahedral anions, (Al,B):Si = 1:1 |
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09.FA.05 Nepheline (Na,K)AlSiO4 P 63 6 |
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09.FA.05 Kaliophilite KAlSiO4 P 6322 6 2 2 |
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09.FA.05 Kalsilite KAlSiO4 P 31c 3m |
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09.FA.05 Panunzite (K,Na)AlSiO4 P 63 6 |
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09.FA.05 Trikalsilite (K,Na)AlSiO4 P 63 6 |
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09.FA.05 Megakalsilite! KAlSiO4 P 63 6 |
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09.FA.05 Yoshiokaite (Ca8-(x/2)[](x/2)Al16-xSixO32) P 3 3 |
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Other Trikalsilite Information
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| References: |
NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) |
| 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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Print or Cut-and-Paste your Trikalsilite Specimen Label here :
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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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