Chlorbartonite Mineral Data

Chlorbartonite Mineral Data

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General Chlorbartonite Information

Chemical Formula:

K6Fe24S26(Cl,S)

Composition:

Molecular Weight = 2,453.28 gm

Potassium 9.72 % K

Iron 54.63 % Fe

Copper 0.52 % Cu

Sulfur 34.11 % S

Chlorine 1.01 % Cl

______

100.00 %

Empirical Formula:

K_6.1Fe²⁺₂₄Cu_0.2S_26.1Cl_0.7

Environment:

Accessory mineral in a microcline-pectolite-sodalite-aegirine vein within feldspathic urtite. Included in sodalite and natrolite crystals.

IMA Status:

Approved IMA 2003 (Dana # Added)

Locality:

Mount Koashva, Khibina Massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Named as the Cl dominant analog of bartonite.

Synonym:

IMA2000-048

Chlorbartonite Image

Images:

Chlorbartonite

Comments: Black grains of chlorbartonite in sodalite-natrolite aggregates.
Location: Mount Koashva, Khibina massif, Kola Peninsula, Russia. Scale: Picture size 1 cm.
© Canadian Mineralogist

Chlorbartonite Crystallography

Axial Ratios:

a:c = 1:1.98574

Cell Dimensions:

a = 10.381, c = 20.614, Z = 2; V = 2,221.47 Den(Calc)= 3.67

Crystal System:

Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: I 4/mmm

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

By Intensity(I/I_o): 2.986(1)(224), 1.83(0.82)(408), 5.97(0.65)(112),2.374(0.57)(316), 1.834(0.51)(440), 3.121(0.45)(312), 2.38(0.38)(332), 9.25(0.33)(101),

Crystal Structure:

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Yakovenchuk V N , Pakhomovsky Y A , Men shikov Y P , Ivanyuk G Y , Krivovichev S V , Burns P C , The Canadian Mineralogist , 41 (2003) p.503-511, Chlorbartonite, K6Fe24S26(Cl,S), a new mineral species from a hydrothermal, vein in the Khibina Massif, Kola Peninsula, Russia: Description and, crystal structure, Locality: Khibina Massif, Kola Peninsula, Russia

Physical Properties of Chlorbartonite

Cleavage:

None

Color:

Brown, Black.

Density:

3.7 - 3.74, Average = 3.72

Diaphaniety:

Opaque

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Habit:

Inclusions - Generally found as inclusions in other minerals.

Hardness:

4 - Fluorite

Luster:

Sub Metallic

Magnetism:

Weakly magnetic

Streak:

black

Optical Properties of Chlorbartonite

RL Anisotrophism:

None.

RL Color:

Yellowish brown.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Chlorbartonite in Air**
λ	R	∑ R(λ)
420 nm	9.80
440 nm	9.90
460 nm	10.20
480 nm	10.80
500 nm	11.50
520 nm	12.30
540 nm	13.10
560 nm	14.00
580 nm	14.80
600 nm	15.60
620 nm	16.40
640 nm	17.10
660 nm	17.80
680 nm	18.40
700 nm	19.00
720 nm	19.50

**Calculated Relative Intensity Colors of Chlorbartonite in Air**
Relative Intensity	0%	90%	100%	180%	270%	360%	450%	540%	630%	720%	810%	850%
R

Calculated Properties of Chlorbartonite

Electron Density:

r_electron=3.52 gm/cc
note: r_{Chlorbartonite}=3.67 gm/cc.

Fermion Index

Fermion Index = 0.01415
Boson Index = 0.98585

Photoelectric:

PE_{Chlorbartonite}= 19.68 barns/electron
U=PE_{Chlorbartonite} x r_electron= 69.21 barns/cc.

Radioactivity:

GRapi = 134.40 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Chlorbartonite - barely detectable

Chlorbartonite Classification

Dana Class:

2.9.19.2 (2)Sulfides - Including Selenides and Tellurides

(2.9)where Am Bn Xp, with (m+n):p=1:1

(2.9.19)Dana Group

2.9.19.1 Bartonite K3Fe10S14 I 4/mmm 4/m 2/m 2/m

2.9.19.2 Chlorbartonite ! K6Fe24S26(Cl,S) I 4/mmm 4/m 2/m 2/m

Strunz Class:

II/F.07-30 II - Sulfides and sulphosalts

II/F - Sulfides with nonmetallic properties, Alkalisulfides

II/F.07 - Rasvumite - Bartonite series

II/F.07-10 Rasvumite KFe2S3 C mcm 2/m 2/m 2/m

II/F.07-20 Bartonite K3Fe10S14 I 4/mmm 4/m 2/m 2/m

II/F.07-30 Chlorbartonite K6Fe24S26(Cl,S) I 4/mmm 4/m 2/m 2/m

Other Chlorbartonite Information

References:

NAME( CanMin, v 41, p 503) PHYS. PROP.(CanMin, v 41, p 503) OPTIC PROP.(CanMin, v 41, p 503)

See Also:

Links to other databases for Chlorbartonite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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

Chlorbartonite

K6Fe24S26(Cl,S)
Dana No: 2.9.19.2 Strunz No: II/F.07-30
Locality:

Notes: