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About KaliophiliteHide

5½ - 6
Crystal System:
Named for the Greek for potassium, kalium, and for friendship/friend, philia/philios.
Dimorph of:
The kaliophilite framework is a variant of the tridymite topology, with alternating SiO4 and AlO4 tetrahedra forming sheets of six-membered rings (63 nets), which are connected along [001] by sharing the apical oxygen atoms (Mugnaioli et al., 2020).
The occurrence of some Na for K substitution (3–10%) may be related to the characteristic structural features of kaliophilite (Mugnaioli et al., 2020).

Classification of KaliophiliteHide

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
3 : Aluminosilicates of K

Physical Properties of KaliophiliteHide

5½ - 6 on Mohs scale

Optical Data of KaliophiliteHide

Uniaxial (-)
RI values:
nω = 1.532 nε = 1.527
Max Birefringence:
δ = 0.005
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:

Chemical Properties of KaliophiliteHide

Common Impurities:

Crystallography of KaliophiliteHide

Crystal System:
Class (H-M):
3 - Pyramidal
Space Group:
Cell Parameters:
a = 27.0597(16) Å, c = 8.5587(6) Å
a:c = 1 : 0.316
Unit Cell V:
5,427.31 ų (Calculated from Unit Cell)
Microtwinning was observed. Previous cell data given: 26.93, 8.52 Å. Originally assumed to have space group P6322.

Type Occurrence of KaliophiliteHide

Synonyms of KaliophiliteHide

Other Language Names for KaliophiliteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
1 photo of Kaliophilite associated with Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
1 photo of Kaliophilite associated with KalsiliteKAlSiO4

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

16.3.1LithositeK6Al4Si8O25 · 2H2OMon.
16.3.3KalsiliteKAlSiO4Hex. 6 2 2 : P63 2 2
16.3.4LeuciteK(AlSi2O6)Tet. 4/m : I41/a
16.3.5MicroclineK(AlSi3O8)Tric. 1
16.3.6OrthoclaseK(AlSi3O8)Mon. 2/m : B2/m
16.3.7SanidineK(AlSi3O8)Mon. 2/m : B2/m
16.3.8MuscoviteKAl2(AlSi3O10)(OH)2Mon. 2/m : B2/b

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 KaliophiliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Mierisch, B. (1887) Die auswurfsblöcke des Monte Somma. Mineralogische und Petrographische Mittheilungen: 8: 113-189.
Bowen, N.L. (1917) The sodium-potassium nephelites. American Journal of Science: 43: 115-132.
Gossner, B., Mussgnug, F. (1930) Contribution to the knowledge of kaliophilite. Zeitschrift für Kristallographie: 73: 187-201.
Bannister, F.A., Hey, M.H. (1931) A chemical, optical, and X-ray study of nepheline and kaliophilite. Mineralogical Magazine: 22: 569-608.
Smith, J.V., Tuttle, O.F. (1957) The nepheline-kalsilite system: I. X-ray data for the crystalline phases. American Journal of Science: 255: 282-305.
Cellai, D., Carpenter, M.A., Heaney, P.J. (1992) Phase transitions and microstructures in natural kaliophilite. European Journal of Mineralogy: 4: 1209-1220.
Gregorkiewitz, M., Li, Y., White, T.J., Withers, R.L., Sobrados, I. (2008) The structure of "orthorhombic" KAlSiO4-O1: evidence for Al-Si order from MAS NMR data combined with Rietveld refinement and electron microscopy. The Canadian Mineralogist: 46: 1511-1526.
E. Mugnaioli, E. Bonaccorsi, A. E. Lanza, E. Elkaim, V. Diez-Gómez, I. Sobrados, M. Gemmi and M. Gregorkiewitz (2020): The structure of kaliophilite KAlSiO4, a long-lasting crystallographic problem. IUCrJ 7, 1070-1083.

Internet Links for KaliophiliteHide

Localities for KaliophiliteHide

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.
Italy (TL)
  • Campania
    • Naples
      • Somma-Vesuvius Complex
[Lapis 1994:5 p.13-23,58]
          • Ercolano
            • San Vito
Russo, M., Punzo, I. (2004): I minerali del Somma-Vesuvio, AMI
Gruppo Mineralogico Geologico Napoletano information
  • Lazio
    • Frosinone Province
      • Supino
Fratangeli G., Severa C. (1996): I minerali nei proietti di Supino (FR). Riv. Mineral. Ital., 20, 3 (3-1996), 251-256.
    • Metropolitan City of Rome Capital
      • Albano Laziale
Barbieri, M., Federico, M., & Tolomeo, L. (1970). Caliofilite nei proietti dei Colli Albani. Rendiconti della Società Italiana di Mineralogia e Petrologia, 26, 401.
Tilley, C.E., and Henry, N.F.M. (1953) Latiumite (sulphatic potassium-calcium-aluminum silicate), a new mineral from Albano, Latium, Italy. Mineralogical Magazine, 30, 39-45;
      • Ariccia
Christof Schäfer
      • Marino
Giovanni Fraccaro collection
      • Rome
Del Caldo, A. (1971) Località mineralogiche consigliate. Le vulcaniti laziali. 2) Minerali della pozzolana romana. Notizie del Guppo Mineralogico Lombardo, 2, 1 (marzo 1971), 9; Del Caldo, A., Moro, C., Gramaccioli, C.M., and Boscardin, M. (1973) Guida ai minerali. Fratelli Fabbri Editori, Milano, 208 pp.
      • Sacrofano
Gentile P. (1985): Kaliofillite di Sacrofano (Roma). Riv. Mineral. Ital., 9, 4 (4-1985), 145-146.
    • Viterbo Province
Di Battistini, G., Montanini, A., Verniaa, L., Venturelli, G., and Tonarini, S. (2001) Petrology of melilite-bearing rocks from the Montefiascone Volcanic Complex (Roman Magmatic Province): New insights into the ultrapotassic volcanism of Central Italy. Lithos, 59, 1–24.
  • Hawaii
    • Honolulu Co.
      • Oahu
        • Honolulu
Hitchcock, C.H. (1900): The Geology of Oahu, Bull. Geol. Soc. Amer. XI, p47
Mineral and/or Locality  
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