Heklaite Mineral Data

General Heklaite Information

Chemical Formula:

KNaSiF6

Composition:

Molecular Weight = 204.16 gm

Potassium 19.15 % K 23.07 % K₂O

Sodium 11.26 % Na 15.18 % Na₂O

Silicon 13.76 % Si 29.43 % SiO₂

Fluorine 55.83 % F 55.83 % F

- % F -23.51 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

KNaSiF₆

Environment:

Fumarolic mineral. New structure type; identical with synthetic KNaSiF6

IMA Status:

Proposed IMA 2008 (Dana # Added)

Locality:

Hekla volcano, Tonci Balic-Žunic, Iceland. Link to MinDat.org Location Data.

Name Origin:

Named after the locality.

Synonym:

IMA2008-052

PDF38-0686

Heklaite Image

Images:

Heklaite

Comments: Post mining sample of heklaite..
Location: Bone Valley Phosphate Mining District, near Bartow, Polk County, Florida. Scale: Specimen size 8.6 x 5.5 x 4.2 cm.
© Isaias Casanova / IC Minerals

Heklaite Crystallography

Axial Ratios:

a:b:c =1.6969:1:1.7801

Cell Dimensions:

a = 9.337, b = 5.5022, c = 9.795, V = 503.21

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: P nma

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.34(1), 4.26(0.56), 4.33(0.53),2.05(0.52), 3.4(0.49), 3.37(0.47), 2.016(0.29), 2.251(0.27),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Fischer J , Kramer V , Materials Research Bulletin , 26 (1991) p.925-930

Physical Properties of Heklaite

Color:

Cololess, White.

Streak:

white

Calculated Properties of Heklaite

Fermion Index:

Fermion Index = 0.0064471931
Boson Index = 0.9935528069

Photoelectric:

PE_Heklaite= 2.96 barns/electron
U=PE_Heklaite x r_electron= . barns/cc.

Radioactivity:

GRapi = 265.28 (Gamma Ray American Petroleum Institute Units)
Concentration of Heklaite per GRapi unit = 0.38 (%)

Estimated Radioactivity from Heklaite - barely detectable

Heklaite Classification

Dana Class:

11.05.09.01 (11)Halide Complexes; Alumino-fluorides

(11.05)where (A)m B (X)6

(11.05.09)Dana Group

11.05.09.01 Heklaite! KNaSiF6 P nma 2/m 2/m 2/m

Strunz Class:

02.DB.05 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.D - Metal Sulfides, M:S = 3:4 and 2:3

02.DB -M:S = 2:3 and similar

02.DB.05 Heklaite! KNaSiF6 P nma 2/m 2/m 2/m

Other Heklaite Information

See Also:

Links to other databases for Heklaite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Ask about Heklaite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Heklaite Specimen Label here :

Heklaite

KNaSiF6
Dana No: 11.05.09.01 Strunz No: 02.DB.05
Locality:

Notes: