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Chlormanganokalite

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Formula:
K4[MnCl6]
System:
Trigonal
Colour:
Champagne, lemon- to ...
Hardness:
Member of:
Name:
In allusion to the composition, containing CHLORine, MANGANese and potassium (Latin = KALium).
Isostructural with:
This page provides mineralogical data about Chlormanganokalite.

Classification of Chlormanganokalite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
3.CJ.05

3 : HALIDES
C : Complex halides
J : With MX6 complexes; M = Fe, Mn, Cu
11.5.4.1

11 : HALIDE COMPLEXES
5 : AmBX6
8.10.3

8 : Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
10 : Halides of Mn
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First Recorded Occurrence of Chlormanganokalite

Year of Discovery:
1906
Geological Setting of First Recorded Material:
Lining cavities in blocks of scoria ejected from an active volcano (Vesuvius).
Associated Minerals at First Recorded Locality:

Physical Properties of Chlormanganokalite

Vitreous
Diaphaneity (Transparency):
Transparent
Colour:
Champagne, lemon- to canary-yellow.
Hardness (Mohs):
Tenacity:
Brittle
Fracture:
Conchoidal
Density:
2.31 g/cm3 (Measured)    

Crystallography of Chlormanganokalite

Crystal System:
Trigonal
Morphology:
Crystals form rhobohedrons, arranged in parallel groups at times.

Optical Data of Chlormanganokalite

Type:
Uniaxial (+)
RI values:
nω = 1.590 nε = 1.590
Max Birefringence:
δ = 0.000
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of Chlormanganokalite

Formula:
K4[MnCl6]
Essential elements:
All elements listed in formula:

Relationship of Chlormanganokalite to other Species

Member of:
Other Members of Group:
RinneiteK3Na[FeCl6]
SaltonseaiteK3NaMnCl6
3.CJ.05RinneiteK3Na[FeCl6]
3.CJ.10ErythrosideriteK2[Fe3+Cl5(H2O)]
3.CJ.10Kremersite(NH4,K)2[Fe3+Cl5(H2O)]
3.CJ.15MitscherlichiteK2CuCl4 · 2H2O
3.CJ.20DouglasiteK2[Fe2+Cl4(OH2)2]
3.CJ.25Redikortsevite(NH4)MgCl3 · 6H2O
3.CJ.30Zirklerite(Fe,Mg,Ca)9Al4Cl18(OH)12 · 14H2O (?)

Other Names for Chlormanganokalite

Other Information

Other Information:
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.

References for Chlormanganokalite

Reference List:
Johnston-Lavis (1906) Nature: 74: 103.

Lacroix (1906) Comptes rendu de l’Académie des sciences de Paris: 142: 1249.

Lacroix (1907) Bulletin de la Société française de Minéralogie: 30: 219.

Johnston-Lavis and Spencer (1908) Mineralogical Magazine: 15: 54.

Bellanca, A. – (1947) La struttura della cloromanganocalite. Periodico di Mineralogia – Roma - pp. 73-88.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged: 109.

Internet Links for Chlormanganokalite

Localities for Chlormanganokalite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Italy
 
  • Campania
    • Naples Province
      • Somma-Vesuvius Complex
Nature (1906) 74, 104; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 109; Lapis (1994): 5: 13-23, 58.
Mineral and/or Locality  
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