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Heklaite (Heklait)

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Heklait
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Heklait
Heklait in kugeligen Aggregaten, Monte Somma, Vesuv, Italien; BB < 1mm
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: Italien/Kampanien (Campania), Region/Neapel, Provinz/Somma-Vesuv-Komplex/Monte Somma
Mineral: Heklaite
Image: 1572713916
License: Usage for Mineralienatlas project only
Heklait

Heklait in kugeligen Aggregaten, Monte Somma, Vesuv, Italien; BB < 1mm
Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2019-11-02
Locality: Monte Somma / Somma-Vesuv-Komplex / Neapel, Provinz / Kampanien (Campania), Region / Italien

Collectors Summary

Color farblos
Streak color weiß
Lustre Glasglanz
Solubility an der Luft stabil
Crystal System orthorhombisch, Pnma

Chemism

Chemical formula

KNaSiF6

Chemical composition

Natrium, Silicium, Fluor, Kalium

Unit weight: 204.1640297 u; Number of atoms in the formula: 9

Info

Empirical formula:

KNaSiF6

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Fluorine

F

55.83

6

66.67

18.9984033

113.9904195
Sodium

Na

11.26

1

11.11

22.9897702

22.9897702
Silicon

Si

13.76

1

11.11

28.0855300

28.0855300
Potassium

K

19.15

1

11.11

39.0983100

39.0983100

Analysis wt%

Si : 13.91, Na : 11.98, K : 18.29, F : 55.66 (Ref: Mineralogical Magazine 2010)

Strunz 9th edition incl. updates

3.CH.

3: Halide (Fluoride, Chloride, Bromide, Iodide)
C: Komplexe Halogenide
H: Silicofluoride

Lapis Classification

III/B.02-015

III: HALOGENIDE (Fluoride, Chloride, Bromide, Jodide)
B: Doppelhalogenide
2: mit [BF4] 1-, [SiF6] 2- und [AlF6] 3-

Classification by Hölzel

3.CD.205

3: HALIDES
C: Simple Halides with (O,OH)
D: With OH, H2O and other Anions

IMA status

anerkannt, IMA WEB-Seite - Neue Mineralien Dez. 2008.

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos

Streak color

weiß

Diaphaneity (Transparency)

transparent

Lustre

Glasglanz

2V angle

Biaxial

Optical Data Luminescence

Luminescence

keine Fluoreszenz bekannt

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

62

Space Group

Pnma

Cell parameters a (Å)

9.339

Cell parameters b (Å)

5.503

Cell parameters c (Å)

9.796

Cell parameters a/b or c/a

1.697

Cell parameters c/b

1.780

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volumne (ų)

503.441

X-Ray Powder Diffraction

4.33(53), 4.26(56), 3.40(49), 3.37(47), 3.34(100), 2.251(27), 2.050(52), 2.016(29)
XRD chart Heklaite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Density (g/cm³)

2.69 berechnet

2.693 ( ρ calc. Mineralienatlas )

Instability

an der Luft stabil

Chemical Properties and Tests

nicht wasserlöslich, stabil unter Laborbedingungen

(Co-)Type locality

(Co-)Type locality

Island/Südisland (Suðurland), Region/Rangárvallasýsla/Hekla-Vulkan

Paragenesis of type material

Malladrit, Hieratit, Ralstonit, Hämatit, Opal

Preface

Name from

nach der Typlokalität, dem Vulkan Hekla

Author (Name, Year)

Garavelli et al., 2010

References

A. Garavelli, T. Balic-Zunic, D. Mitolo, P. Acquafredda, E. Leonardsen, S. P. Jakobsson: Heklaite, KNaSiF6, a new fumarolic mineral from Hekla volcano, Iceland. Mineralogical Magazine 74 (2010) S. 147-157.

IMA WEB-Seite - Neue Mineralien Dez. 2008.
Mineralien Welt 01/11, Neue Mineralien, Steffen Jahn

Other languages

German

Heklait

Spanish

Heklaita

English

Heklaite

Russian

Геклаит

CNMNC (IMA)-Number

IMA 2008-052

CNMNC symbol

Symbol

Hek

Locations with GPS information