Chlormanganokalite
A valid IMA mineral species - grandfathered
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About Chlormanganokalite
Formula:
K4[MnCl6]
Colour:
Champagne, lemon- to canary-yellow.
Lustre:
Vitreous
Hardness:
2½
Specific Gravity:
2.31
Crystal System:
Trigonal
Member of:
Name:
In allusion to the composition, containing CHLORine, MANGANese and potassium (Latin = KALium).
Isostructural with:
This page provides mineralogical data about Chlormanganokalite.
Unique Identifiers
Mindat ID:
1019
Long-form identifier:
mindat:1:1:1019:7
GUID
(UUID V4):
(UUID V4):
24efa7fe-3930-43de-a2f9-37ae7a44bc86
IMA Classification of Chlormanganokalite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
K4MnCl6
Classification of Chlormanganokalite
3.CJ.05
3 : HALIDES
C : Complex halides
J : With MX6 complexes; M = Fe, Mn, Cu
3 : HALIDES
C : Complex halides
J : With MX6 complexes; M = Fe, Mn, Cu
11.5.4.1
11 : HALIDE COMPLEXES
5 : AmBX6
11 : HALIDE COMPLEXES
5 : AmBX6
8.10.3
8 : Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
10 : Halides of Mn
8 : Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
10 : Halides of Mn
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Cmk | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Chlormanganokalite
Vitreous
Transparency:
Transparent
Colour:
Champagne, lemon- to canary-yellow.
Hardness:
2½ on Mohs scale
Tenacity:
Brittle
Fracture:
Conchoidal
Density:
2.31 g/cm3 (Measured) 2.303 g/cm3 (Calculated)
Optical Data of Chlormanganokalite
Type:
Uniaxial (+)
RI values:
nω = 1.590 nε = 1.590
Birefringence:
low
Max Birefringence:
δ = 0.000
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Chemistry of Chlormanganokalite
Mindat Formula:
K4[MnCl6]
Elements listed:
Crystallography of Chlormanganokalite
Crystal System:
Trigonal
Class (H-M):
3m (3 2/m) - Hexagonal Scalenohedral
Space Group:
R3m
Setting:
R3m
Cell Parameters:
a = 11.93 Å, c = 14.79 Å
Ratio:
a:c = 1 : 1.24
Unit Cell V:
1,822.97 ų (Calculated from Unit Cell)
Z:
6
Morphology:
Crystals form rhobohedrons, arranged in parallel groups at times.
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0019234 | Chlormanganokalite | Bellanca A (1947) La struttura della cloromanganocalite Periodico di Mineralogia 16 73-88 | 1947 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
2.55 Å | (100) |
2.69 Å | (80) |
5.90 Å | (50) |
3.55 Å | (50) |
2.82 Å | (28) |
3.45 Å | (24) |
2.50 Å | (24) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 7: Great Oxidation Event | <2.4 |
45b : [Other oxidized fumarolic minerals] | |
Stage 10b: Anthropogenic minerals | <10 Ka |
54 : Coal and other mine fire minerals (see also #51 and #56) |
Type Occurrence of Chlormanganokalite
General Appearance of Type Material:
Rhombohedra
Place of Conservation of Type Material:
Natural History Museum, Paris, France, 106.340, 106.341 [decomposed]; The Natural History Museum, London, England, 1907,191–193.
Geological Setting of Type Material:
Lining cavities in blocks of scoria ejected from an active volcano (Vesuvius).
Associated Minerals at Type Locality:
Reference:
Johnston-Lavis H J, Spencer L J (1908) On chlormanganokalite, a new Vesuvian mineral; with notes on some of the associated minerals. Mineralogical Magazine 15, 54-61
Synonyms of Chlormanganokalite
Other Language Names for Chlormanganokalite
Relationship of Chlormanganokalite to other Species
Member of:
Other Members of this group:
Rinneite | K3Na[FeCl6] | Trig. 3m (3 2/m) : R3c |
Saltonseaite | K3NaMnCl6 | Trig. 3m (3 2/m) : R3c |
Related Minerals - Strunz-mindat Grouping
3.CJ.05 | Rinneite | K3Na[FeCl6] |
3.CJ.05 | Saltonseaite | K3NaMnCl6 |
3.CJ.10 | Erythrosiderite | K2[Fe3+Cl5(H2O)] |
3.CJ.10 | Kremersite | (NH4,K)2[Fe3+Cl5(H2O)] |
3.CJ.15 | Mitscherlichite | K2CuCl4 · 2H2O |
3.CJ.20 | Douglasite | K2[Fe2+Cl4(OH2)2] |
3.CJ.25 | Redikortsevite | (NH4)MgCl3 · 6H2O |
3.CJ.30 | Zirklerite | (Fe,Mg,Ca)9Al4Cl18(OH)12 · 14H2O (?) |
3.CJ.30 | Kalithallite | K3Tl3+Cl6 · 2H2O |
Fluorescence of Chlormanganokalite
None
Other Information
Notes:
Readily soluble in water. Alters on exposure in moist air by turning dull and then deliquesces to a yellow liquid.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Chlormanganokalite
mindat.org URL:
https://www.mindat.org/min-1019.html
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References for Chlormanganokalite
Reference List:
Localities for Chlormanganokalite
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and 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 (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Italy (TL) | |
| Nature (1906) +2 other references |
Pelloux (1927) +2 other references | |
Poland | |
| Ł. Kruszewski PXRD data |
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Vesuvius fumaroles, Mount Vesuvius, Somma-Vesuvius Complex, Naples, Campania, Italy