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Specific Gravity:
Crystal System:
Named for its chemical composition (K, Na, Si, B, F).
This page provides mineralogical data about Knasibfite.

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Classification of KnasibfiteHide

Approval Year:

C : Complex halides
H : Silicofluorides

Physical Properties of KnasibfiteHide

2.75(1) g/cm3 (Measured)    2.77 g/cm3 (Calculated)

Optical Data of KnasibfiteHide

RI values:
nα = 1.320(1)
Max Birefringence:
δ = 1.320 - Isotropic minerals have no birefringence
Surface Relief:

Chemical Properties of KnasibfiteHide


Crystallography of KnasibfiteHide

Crystal System:
Class (H-M):
mm2 - Pyramidal
Space Group:
Cell Parameters:
a = 5.522 Å, b = 17.106 Å, c = 9.175 Å
a:b:c = 0.323 : 1 : 0.536
Unit Cell V:
866.7 ų

X-Ray Powder DiffractionHide

Powder Diffraction Data:
8.55 (50)
8.10 (25)
4.724 (25)
4.043 (100)
3.175 (30)
2.281 (50)
2.095 (25)
1.795 (25)

Type Occurrence of KnasibfiteHide

Synonyms of KnasibfiteHide

Other Language Names for KnasibfiteHide

Simplified Chinese:氟硼硅钾钠石

Related Minerals - Nickel-Strunz GroupingHide

3.CH.10Bararite(NH4)2[SiF6]Trig. 3m (3 2/m)
3.CH.15Cryptohalite(NH4)2[SiF6]Iso. m3m (4/m 3 2/m) : Fm3m
3.CH.15HieratiteK2[SiF6]Iso. m3m (4/m 3 2/m) : Fm3m
3.CH.20DemartiniteK2[SiF6]Hex. 6mm : P63mc

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 KnasibfiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
F.Demartin, C.M.Gramaccioli, I. Campostrini & P.Orlandi (2008), Knasibfite, a new hexafluorosilicate from La Fossa crater, Vulcano, Aeolian Islands, Italy, Canadian Mineralogist 46, 447-453.

Internet Links for KnasibfiteHide

Localities for KnasibfiteHide

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)
  • Sicily
    • Messina Province
      • Eolie Islands (Aeolian Islands)
        • Lipari
          • Vulcano Island
F.Demartin, C.M.Gramaccioli, I. Campostrini & P.Orlandi (2008), Knasibfite, a new hexafluorosilicate from La Fossa crater, Vulcano, Aeolian Islands, Italy, Canadian Mineralogist 46, 447-453.
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