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Kaliophilite

A valid IMA mineral species - grandfathered
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About KaliophiliteHide

Formula:
KAlSiO4
Colour:
Colorless
Lustre:
Silky
Hardness:
5½ - 6
Specific Gravity:
2.493 - 2.649
Crystal System:
Trigonal
Name:
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).


Unique IdentifiersHide

Mindat ID:
2139
Long-form identifier:
mindat:1:1:2139:1
GUID
(UUID V4):
7f170d8a-1a4b-433b-bff8-734a98b87a1b

IMA Classification of KaliophiliteHide

Approved, 'Grandfathered' (first described prior to 1959)
First published:
1887

Classification of KaliophiliteHide

9.FA.05

9 : SILICATES (Germanates)
F : Tektosilicates without zeolitic H2O
A : Tektosilicates without additional non-tetrahedral anions
76.2.1.5

76 : TECTOSILICATES Al-Si Framework
2 : Al-Si Framework Feldspathoids and related species
16.3.2

16 : Silicates Containing Aluminum and other Metals
3 : Aluminosilicates of K

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
KlpIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of KaliophiliteHide

Silky
Transparency:
Transparent
Colour:
Colorless
Streak:
White
Hardness:
5½ - 6 on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
{0001}
Density:
2.493 - 2.649 g/cm3 (Measured)    2.65 g/cm3 (Calculated)

Optical Data of KaliophiliteHide

Type:
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:
Low

Chemistry of KaliophiliteHide

Mindat Formula:
KAlSiO4
Common Impurities:
Fe,Ca,Na

Crystallography of KaliophiliteHide

Crystal System:
Trigonal
Class (H-M):
3 - Pyramidal
Space Group:
P3
Cell Parameters:
a = 27.0597(16) Å, c = 8.5587(6) Å
Ratio:
a:c = 1 : 0.316
Unit Cell V:
100.5 ų
Z:
54
Comment:
Microtwinning was observed. Previous cell data given: 26.93, 8.52 Å. Originally assumed to have space group P6322.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.09 Å(100)
2.593 Å(30)
2.131 Å(25)
4.26 Å(15)
3.76 Å(12)
3.02 Å(12)
2.814 Å(12D)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 3a: Earth’s earliest Hadean crust>4.50
9 : Lava/xenolith minerals (hornfels, sanidinite facies)
Stage 4b: Highly evolved igneous rocks>3.0
35 : Ultra-alkali and agpaitic igneous rocks

Type Occurrence of KaliophiliteHide

Geological Setting of Type Material:
In blocks of biotite-pyroxenite volcanic ejecta.
Reference:
Mierisch, B. (1887) Die auswurfsblöcke des Monte Somma. Mineralogische und Petrographische Mittheilungen: 8: 113-189.

Synonyms of KaliophiliteHide

Other Language Names for KaliophiliteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
2 photos of Kaliophilite associated with Davyne(Na,K)6Ca2(Al6Si6O24)(Cl2,SO4)2
1 photo of Kaliophilite associated with Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
1 photo of Kaliophilite associated with KalsiliteKAlSiO4
1 photo of Kaliophilite associated with CalciteCaCO3

Related Minerals - Strunz-mindat GroupingHide

9.FA.HexacelsianBaAl2Si2O8Hex. 6/mmm (6/m 2/m 2/m) : P63/mcm
9.FA.Wodegongjieite KCa3(Al7Si9)O32Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
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.05TrikalsiliteK2NaAl3(SiO4)3Hex. 6 : P63
9.FA.05Yoshiokaite(Ca,Na)[Al(Al,Si)O4]Trig. 3 : P3
9.FA.05CarnegieiteNaAlSiO4Tric.
9.FA.05 vaGermanate-nepheline(Na,K)AlGeO4
9.FA.05MegakalsiliteKAlSiO4Hex. 6 : P63
9.FA.05TrinephelineNaAlSiO4 Hex. 6 : P61
9.FA.05Davidsmithite(Ca,◻)2Na6Al8Si8O32Hex. 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)(AlSi3O8)Mon. 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.30RubiclineRb(AlSi3O8)Mon. 2/m : B2/m
9.FA.30 vaGermanate-celsianBaAl2Ge2O8
9.FA.30MonalbiteNaAlSi3O8Mon. 2/m : B2/m
9.FA.30FerrisanidineK[Fe3+Si3O8]Mon. 2/m : B2/m
9.FA.35AlbiteNa(AlSi3O8)Tric. 1
9.FA.35AnorthiteCa(Al2Si2O8)Tric. 1 : P1
9.FA.35ReedmergneriteNaBSi3O8Tric. 1 : P1
9.FA.40ParacelsianBa(Al2Si2O8)Mon. 2/m : P21/b
9.FA.45SvyatoslaviteCa(Al2Si2O8)Mon. 2 : P21
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.60StronalsiteNa2SrAl4Si4O16Orth.
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.70StöffleriteCaAl2Si2O8Tet. 4/m : I4/m
9.FA.70Lingunite(Na,Ca)AlSi3O8Tet. 4/m : I4/m
9.FA.70LiebermanniteKAlSi3O8Tet. 4/m : I4/m
9.FA.75KokchetaviteK(AlSi3O8)Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc

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.

Internet Links for KaliophiliteHide

References 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 references and 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 (e.g. 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 +1 other reference
          • Ercolano
            • San Vito
Russo et al. (2004)
Gruppo Mineralogico Geologico ...
  • Lazio
    • Frosinone Province
      • Supino
Fratangeli G. (1996)
    • Metropolitan City of Rome Capital
      • Alban Hills
Barbieri et al. (1970)
      • Albano Laziale
Tilley et al. (1953)
      • Ariccia
Christof SchÀfer
      • Marino
Giovanni Fraccaro collection
      • Rome
Del Caldo (1971) +1 other reference
      • Sacrofano
Gentile P. (1985)
    • Viterbo Province
Di Battistini et al. (2001)
USA
 
  • Hawaii
    • Honolulu County
      • Oahu Island
        • Honolulu
Hitchcock (1900)
 
Mineral and/or Locality  
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