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Kaliochalcite

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About KaliochalciteHide

Formula:
KCu2(SO4)2[(OH)(H2O)]
Colour:
Light green, bright grass-green or almost colourless
Lustre:
Vitreous
Hardness:
4
Specific Gravity:
3.49 (Calculated)
Crystal System:
Monoclinic
Name:
Named as the potassium analogue of natrochalcite.
This page provides mineralogical data about Kaliochalcite.


Classification of KaliochalciteHide

Approved
Approval Year:
2013

Physical Properties of KaliochalciteHide

Vitreous
Transparency:
Transparent, Translucent
Colour:
Light green, bright grass-green or almost colourless
Hardness:
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
3.49 g/cm3 (Calculated)

Optical Data of KaliochalciteHide

Type:
Biaxial (+)
RI values:
nα = 1.630(3) nβ = 1.650(3) nγ = 1.714(3)
2V:
Measured: 55° (10)
Max Birefringence:
δ = 0.084
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of KaliochalciteHide

Formula:
KCu2(SO4)2[(OH)(H2O)]

Crystallography of KaliochalciteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C2/m
Cell Parameters:
a = 8.935(2) Å, b = 6.252(2) Å, c = 7.602(2) Å
β = 117.318(5)°
Ratio:
a:b:c = 1.429 : 1 : 1.216
Unit Cell V:
377.3 ų
Z:
2
Morphology:
Crust; Pseudo-rhombohedral crystals; as finegrained pseudomorphs after anhydrous KCu-sulphates.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
6.78(100)
3.484(70)
3.249(63)
2.892(77)
2.852(83)
2.554(72)
2.326(44)
1.693(37)
Comments:
From Type Description.

Type Occurrence of KaliochalciteHide

General Appearance of Type Material:
Asd polymineralic crusts (up to several dozens cm2 in area and up to 0.5 cm thick. Forms fine-grained pseudomorphs after anhydrous KCu-sulphates, mainly euchlorine, fedotovite or piypite, usually with their relics.
Place of Conservation of Type Material:
Type material is deposited in the collections of the Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia, registration number 4154/1
Associated Minerals at Type Locality:

Synonyms of KaliochalciteHide

Relationship of Kaliochalcite to other SpeciesHide

Other Members of this group:
CabalzariteCa(Mg,Al,Fe3+)2(AsO4)2(OH,H2O)2Mon. 2/m : B2/m
CobaltlotharmeyeriteCa(Co,Fe3+,Ni)2(AsO4)2 · 2(H2O,OH)Mon. 2/m : B2/m
CobalttsumcoritePb(Co,Fe3+,Ni)2(AsO4)2 · 2(H2O,OH)Mon. 2/m : B2/m
FerrilotharmeyeriteCa(Fe3+,Zn)2(AsO4)2 · 2(OH,H2O)Mon. 2/m : B2/m
GartrellitePb(Cu,Fe3+,Zn)2(AsO4,SO4)2 · 2(H2O,OH)Tric. 1 : P1
HelmutwinkleritePb(Zn,Cu)2(AsO4)2 · 2H2OTric.
KrettnichitePbMn3+2(VO4)2(OH)2Mon. 2/m : B2/m
LotharmeyeriteCa(Zn,Mn3+)2(AsO4)2 · 2(H2O,OH)Mon. 2/m : B2/m
LukrahniteCa(Cu,Zn)(Fe3+,Zn)(AsO4)2 · 2(H2O,OH)Tric. 1 : P1
ManganlotharmeyeriteCaMn3+2(AsO4)2(OH)2Mon. 2/m : B2/m
MawbyitePb(Fe3+,Zn)2(AsO4)2 · 2(OH,H2O)Mon.
MounanaitePbFe3+2(VO4)2(OH,F)2Mon. 2/m : B2/m
NatrochalciteNaCu2(SO4)2(OH) · 2H2OMon. 2/m : B2/m
NickellotharmeyeriteCa(Ni,Fe3+,Co)2(AsO4)2 · 2(H2O,OH)Mon. 2/m : B2/m
Nickelschneebergite(Bi3+,Ca)(Ni,Co,Fe3+)2(AsO4)2 · 2(OH,H2O)Mon. 2/m : B2/m
NickeltsumcoritePb(Ni,Fe3+)2(AsO4)2(H2O,OH)2Mon. 2/m : B2/m
PhosphogartrellitePb(Cu,Fe3+)2(PO4,AsO4)2 · 2(H2O,OH)Tric.
RappolditePb(Co,Ni,Zn)2(AsO4)2 · 2H2OTric.
Schneebergite(Bi3+,Ca)(Co,Ni,Fe3+)2(AsO4)2(OH,H2O)2Mon. 2/m : B2/m
ThometzekitePbCu2+2(AsO4)2 · 2H2OMon. 2/m : B2/m
TsumcoritePbZn2(AsO4)2 · 2H2OMon.
YancowinnaitePbCuAl(AsO4)2OH · H2O Tric. 1 : P1
ZincgartrellitePb(Zn,Fe3+,Cu)2(AsO4)2 · 2(H2O,OH)Tric. 1 : P1

Other InformationHide

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 KaliochalciteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Pekov, I.V., Siidra, O.I., Chukanov, N.V., Yapaskurt, V.O., Belakovskiy, D.I., Zelenski, M.E., Murashko, M.N. and Sidorov, E.G. (2013) Kaliochalcite, IMA 2013-037. CNMNC Newsletter No. 17, October 2013, page 2998; Mineralogical Magazine, 77, 2997-3005.
Pekov, I.V., Siidra, O.I., Chukanov, N.V., Yapaskurt, V.O., Belakovskiy, D.I., Murashko, M.N., Sidorov, E.G. (2014): Kaliochalcite, KCu2(SO4)2[(OH)(H2O)], a new tsumcorite-group mineral from the Tolbachik volcano, Kamchatka, Russia. European Journal of Mineralogy, 26, 597-604.

Internet Links for KaliochalciteHide

Localities for KaliochalciteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Russia (TL)
 
  • Kamchatka Krai
    • Tolbachik volcano
      • Great Fissure eruption (Main Fracture)
        • Northern Breakthrough (North Breach)
          • Second scoria cone
Pekov, I.V., Siidra, O.I., Chukanov, N.V., Yapaskurt, V.O., Belakovskiy, D.I., Murashko, M.N., Sidorov, E.G. (2014): Kaliochalcite, KCu2(SO4)2[(OH)(H2O)], a new tsumcorite-group mineral from the Tolbachik volcano, Kamchatka, Russia. European Journal of Mineralogy, 26, 597-604.
Pekov, I.V., Siidra, O.I., Chukanov, N.V., Yapaskurt, V.O., Belakovskiy, D.I., Zelenski, M.E., Murashko, M.N. and Sidorov, E.G. (2013) Kaliochalcite, IMA 2013-037. CNMNC Newsletter No. 17, October 2013, page 2998; Mineralogical Magazine, 77, 2997-3005. ; Pekov, I.V., Siidra, O.I., Chukanov, N.V., Yapaskurt, V.O., Belakovskiy, D.I., Murashko, M.N., Sidorov, E.G. (2014): Kaliochalcite, KCu2(SO4)2[(OH)(H2O)], a new tsumcorite-group mineral from the Tolbachik volcano, Kamchatka, Russia. European Journal of Mineralogy, 26, 597-604.
Mineral and/or Locality  
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