Chlormanganokalite Mineral Data

General Chlormanganokalite Information

Chemical Formula:

K4MnCl6

Composition:

Molecular Weight = 424.05 gm

Potassium 36.88 % K 44.43 % K₂O

Manganese 12.96 % Mn 16.73 % MnO

Chlorine 50.16 % Cl 50.16 % Cl

- % Cl -11.32 % -O=Cl₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

K₄Mn²⁺Cl₆

Environment:

Volcanic fumaroles.

IMA Status:

Valid Species (Pre-IMA) 1906

Locality:

Vesuvius, Italy. Link to MinDat.org Location Data.

Name Origin:

Named after its chemical composition of Cl, Mn, and K (Latin kalium).

Synonym:

ICSD 24475

PDF 3-856

Chlormanganokalite Crystallography

Axial Ratios:

a:c = 1:1.23973

Cell Dimensions:

a = 11.93, c = 14.79, Z = 6; V = 1,822.97 Den(Calc)= 2.32

Crystal System:

Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3c

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

By Intensity(I/I_o): 2.55(1), 2.69(0.8), 5.9(0.5),

Physical Properties of Chlormanganokalite

Cleavage:

None

Color:

Yellow, Light yellow.

Density:

2.31

Diaphaneity:

Transparent

Fracture:

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

Hardness:

2.5 - Finger Nail

Luster:

Vitreous - Greasy

Streak:

light yellow

Optical Properties of Chlormanganokalite

Optical Data:

Uniaxial (+), w=1.59, e=1.59, bire=0.0000.

Calculated Properties of Chlormanganokalite

Electron Density:

Bulk Density (Electron Density)=2.22 gm/cc
note: Specific Gravity of Chlormanganokalite =2.32 gm/cc.

Fermion Index:

Fermion Index = 0.0000442573
Boson Index = 0.9999557427

Photoelectric:

PE_{Chlormanganokalite}= 10.45 barns/electron
U=PE_{Chlormanganokalite} x r_electron= 23.22 barns/cc.

Radioactivity:

GRapi = 509.49 (Gamma Ray American Petroleum Institute Units)
Concentration of Chlormanganokalite per GRapi unit =1,962.73 (PPM)

**Estimated Radioactivity from Chlormanganokalite** - mild
Specimen Size Weight/Volume (Sphere) *	Calculated Activity Bequerols (Bq)	Calculated Activity Curies (Ci)	Estimated Activity GR(api)	Estimated Exposure (mRem**)/hr If Held in Hand For One Hour
1000 gm / 9.37 cm	11,175	3.02E-07	509.49	0.17
100 gm / 4.35 cm	1,118	3.02E-08	50.95	0.02
10 gm / 2.02 cm	112	3.02E-09	5.09	0.00
1 gm / 9.37 mm	11	3.02E-10	0.51	0.00
0.1 gm / 4.35 mm	1	3.02E-11	0.05	0.00
0.01 gm / 2.02 mm	0	3.02E-12	0.01	0.00
0.001 gm / 0.94 mm	0	3.02E-13	0.00	0.00

Weight of pure Chlormanganokalite in grams (gm) and Calculated Diameter of a Sphere with a Density of 2.32 gm/cc.*
Goverment Estimate of Average Annual Exposure ( 360 mRem) **
Note: 10 microsieverts/hr = 1 mRem/hr **
Max Permissable Adult Dose 50,000 mRem/yr (hands), 15,000 mRem/yr (eyes)
Lethal Dose LD(50) Exposure 400,000 to 500,000 mRem

Chlormanganokalite Classification

Dana Class:

11.05.04.01 (11)Halide Complexes; Alumino-fluorides

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

(11.05.04)Dana Group

11.05.04.01 Chlormanganokalite K4MnCl6 R 3c 3 2/m

Strunz Class:

03.CJ.05 03 - HALIDES

03.C - Complex Halides

03.CJ -With MX6 complexes; M = Fe, Mn, Cu

03.CJ.05 Chlormanganokalite K4MnCl6 R 3c 3 2/m

03.CJ.05 Rinneite K3NaFeCl6 R 3c 3 2/m

Other Chlormanganokalite Information

References:

NAME( Emsley91) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Chlormanganokalite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info
14 - WWW-MINCRYST

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

Chlormanganokalite

K4MnCl6
Dana No: 11.05.04.01 Strunz No: 03.CJ.05
Locality:

Notes:

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