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Crystal System:
From Greek, "tria", three, because the length of its a-axis is triple that of its dimorph Kalsilite.
This page provides mineralogical data about Trikalsilite.

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Classification of TrikalsiliteHide

Approved, 'Grandfathered' (first described prior to 1959)

9 : SILICATES (Germanates)
F : Tektosilicates without zeolitic H2O
A : Tektosilicates without additional non-tetrahedral anions

76 : TECTOSILICATES Al-Si Framework
2 : Al-Si Framework Feldspathoids and related species

16 : Silicates Containing Aluminum and other Metals
4 : Aluminosilicates of Na and K

Physical Properties of TrikalsiliteHide


Chemical Properties of TrikalsiliteHide

IMA Formula:

Crystallography of TrikalsiliteHide

Crystal System:
Cell Parameters:
a = 15.339(4) Å, c = 8.501(2) Å
a:c = 1 : 0.554
Unit Cell V:
1,732.19 ų (Calculated from Unit Cell)

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0014833TrikalsiliteBonaccorsi E, Merlino S, Pasero M (1988) Trikalsilite: its structural relationships with nepheline and tetraskalsilite Neues Jahrbuch fur Mineralogie, Monatshefte 1988 559-5671988Near Mt. Nyiragongo, Virunga volcanic field, North Kivu, Zaire0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
4.269 Å(35)
3.932 Å(30)
3.384 Å(25)
3.076 Å(100)
3.050 Å(95)
2.558 Å(45)
2.410 Å(35)

Type Occurrence of TrikalsiliteHide

General Appearance of Type Material:
Fine-grained, in parallel intergrowth with nepheline and kalsilite.
Geological Setting of Type Material:
In potassic lava.

Other Language Names for TrikalsiliteHide

Relationship of Trikalsilite to other SpeciesHide

Other Members of this group:
Cancrinite GroupA large, structurally complex group of alumosilicates.
Davidsmithite(Ca,□)2Na6Al8Si8O32Hex. 6 : P63
KalsiliteKAlSiO4Hex. 6 2 2 : P63 2 2
LeuciteK(AlSi2O6)Tet. 4/m : I41/a
MetaleuciteA name for isometric leucite that is stable above 625 degrees C.
NephelineNa3K(Al4Si4O16)Hex. 6 : P63
Sodalite GroupThe Sodalite Group is characterised by sodalite-type stacking of alumosilicate building units that produces ...
TrinephelineNaAlSiO4Hex. 6 : P61
Yoshiokaite(Ca,Na)[Al(Al,Si)O4]Trig. 3 : P3

Related Minerals - Nickel-Strunz GroupingHide

9.FA.05KalsiliteKAlSiO4Hex. 6 2 2 : P63 2 2
9.FA.05NephelineNa3K(Al4Si4O16)Hex. 6 : P63
9.FA.05Panunzite(K,Na)AlSiO4Hex. 6 : P63
9.FA.05Yoshiokaite(Ca,Na)[Al(Al,Si)O4]Trig. 3 : P3
9.FA.05MegakalsiliteKAlSiO4Hex. 6 : P63
9.FA.10MalinkoiteNaBSiO4Hex. 6 : P63
9.FA.15VirgiliteLiAlSi2O6Hex. 6 2 2 : P62 2 2
9.FA.25LisitsyniteKBSi2O6Orth. 2 2 2 : P2 2 2
9.FA.30Buddingtonite(NH4)(AlSi3)O8Mon. 2 : P21
9.FA.30CelsianBa(Al2Si2O8)Mon. 2/m
9.FA.30MicroclineK(AlSi3O8)Tric. 1
9.FA.30OrthoclaseK(AlSi3O8)Mon. 2/m : B2/m
9.FA.30SanidineK(AlSi3O8)Mon. 2/m : B2/m
9.FA.30MonalbiteNaAlSi3O8Mon. 2/m : B2/m
9.FA.35AlbiteNa(AlSi3O8)Tric. 1
9.FA.35AnorthiteCa(Al2Si2O8)Tric. 1 : P1
9.FA.45KumdykoliteNa(AlSi3O8)Orth. mmm (2/m 2/m 2/m) : Pnnm
9.FA.50SlawsoniteSr(Al2Si2O8)Mon. 2/m : P21/b
9.FA.55LisetiteCaNa2Al4Si4O16Orth. mm2
9.FA.60BanalsiteNa2BaAl4Si4O16Orth. mm2 : Iba2
9.FA.65DanburiteCaB2Si2O8Orth. mmm (2/m 2/m 2/m)
9.FA.65MaleeviteBaB2Si2O8Orth. mmm (2/m 2/m 2/m) : Pnma
9.FA.65PekoviteSrB2Si2O8Orth. mmm (2/m 2/m 2/m) : Pnma
9.FA.70Lingunite(Na,Ca)AlSi3O8Tet. 4/m : I4/m
9.FA.75KokchetaviteK(AlSi3O8)Hex. 6/mmm (6/m 2/m 2/m) : P6/mmm

Related Minerals - Dana Grouping (8th Ed.)Hide 6 2 2 : P63 2 2 6 : P63,Na)AlSiO4Hex. 6 : P63,Na)[Al(Al,Si)O4]Trig. 3 : P3

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

16.4.1NephelineNa3K(Al4Si4O16)Hex. 6 : P63
16.4.2Panunzite(K,Na)AlSiO4Hex. 6 : P63
16.4.5Naujakasite(Na,K)6(Fe2+,Mn2+,Ca)(Al,Fe)4Si8O26Mon. 2/m : B2/m
16.4.6Montesommaite(K,Na)9Al9Si23O64 · 10H2OOrth.

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for TrikalsiliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Sahama T.G., Smith J.V. (1957) Tri-kalsilite, a new mineral. American Mineralogist, 42, 286.
Bonaccorsi E., Merlino S., Pasero M. (1988), Trikalsilite: its structural relationships with nepheline and tetrakalsilite. Neues Jahrbuch für Mineralogie, Monatshefte (1988): (12): 559-567.

Internet Links for TrikalsiliteHide

Localities for TrikalsiliteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • Jujuy Province
    • Rinconada Department
Ian Graham, Stephen Harris, Laure Martin, Angela Lay, William Powell, Elena Belousova, Eduardo Zappettini (2018) Unusual alluvial sapphires from Orosmayo, Argentina: a multi-analytical approach to decipher their
DR Congo (TL)
  • North Kivu
    • Nyiragongo Territory
      • Nyiragongo Volcano
Sahama T G, Smith J V (1957) Notes and news: Tri-kalsilite, a new mineral. American Mineralogist 42, 286-286
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