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Heklaite

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About HeklaiteHide

Formula:
KNaSiF6
Colour:
Colourless
Lustre:
Vitreous
Specific Gravity:
2.69 (Calculated)
Crystal System:
Orthorhombic
Name:
For the type locality.
Type locality heklaite is the natural product of hydrofluoric acid-bearing volcanic fumarole gases reacting with feldspar in volcanic rock. The much finer heklaite crystals from Polk County, Florida, are an accidental synthetic in gypsum industrial waste piles, a product of reaction between clay minerals and the hydrofluoric acid-rich byproducts of superphosphate fertilizer production.


Classification of HeklaiteHide

Approved
Approval Year:
2008
11.5.8.

11 : HALIDE COMPLEXES
5 : AmBX6

Physical Properties of HeklaiteHide

Vitreous
Transparency:
Transparent
Colour:
Colourless
Streak:
White
Density:
2.69 g/cm3 (Calculated)

Chemical Properties of HeklaiteHide

Formula:
KNaSiF6

Crystallography of HeklaiteHide

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pnma
Cell Parameters:
a = 9.3370(9) Å, b = 5.5022(5) Å, c = 9.795(1) Å
Ratio:
a:b:c = 1.697 : 1 : 1.78
Unit Cell V:
503.43 ų
Z:
4

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.33 (53)
4.26 (56)
3.40 (49)
3.37 (47)
3.34 (100)
2.251 (27)
2.050 (52)
2.016 (29)
(

Type Occurrence of HeklaiteHide

General Appearance of Type Material:
Fine-grained mass of micrometre- to submicrometre-sized crystals.
Place of Conservation of Type Material:
Icelandic Institute of Natural History, Reykjavík, Iceland (NI 15513); Museum "C.L. Garavelli", Dipartimento Geomineralogico, Universita di Bari, Italy (9/nm-V28).
Geological Setting of Type Material:
In fumarolic encrustations.
Associated Minerals at Type Locality:

Synonyms of HeklaiteHide

Fluorescence of HeklaiteHide

Non-fluorescent.

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 HeklaiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Garavelli, A., Balić-Žunić, T., Mitolo, D., Acquafredda, P., Leonardsen, E., Jakobson, S.P. (2010): Heklaite, KNaSiF6, a new fumarolic mineral from Hekla volcano, Iceland. Mineralogical Magazine, 74, 147-157.

Internet Links for HeklaiteHide

Localities for HeklaiteHide

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.
Iceland (TL)
 
  • Southern Region
Garavelli, A., Balić-Žunić, T., Mitolo, D., Acquafredda, P., Leonardsen, E., Jakobson, S.P. (2010): Heklaite, KNaSiF6, a new fumarolic mineral from Hekla volcano, Iceland. Mineralogical Magazine, 74, 147-157.
USA
 
  • Florida
    • Polk Co.
Isaias Casanova specimens; analyses by RRUFF and by John Attard (attminerals.com).
RRUFF Database Specimen I.D RO90034
  • Hawaii
    • Hawaii Co. (Hawaii Island)
Hon, K., Bove, D.J., Lee, L., and Thornber, C., 2009, The origin and zonation of sublimates and precipitates in active Hawaiian lava tubes: Geological Society of America Abstracts with Programs, v. 41, no. 7, p.193.
Mineral and/or Locality  
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