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Challacolloite

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Formula:
KPb2Cl5
System:
Monoclinic
Colour:
Colourless to white
Hardness:
2 - 3
Name:
Named after its type locality
Isostructural with:
The K analogue of hephaistosite.

Classification of Challacolloite

Approved 2005
3.AA.55

3 : HALIDES
A : Simple halides, without H2O
A : M:X = 1:1, 2:3, 3:5, etc.
11.4.2.1

11 : HALIDE COMPLEXES
4 : AmBX5·xH2O
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http://www.mindat.org/min-27422.html
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Type Occurrence of Challacolloite

General Appearance of Type Material:
thin crusts
Geological Setting of Type Material:
hydrothermal phases
Associated Minerals at Type Locality:

Occurrences of Challacolloite

Geological Setting:
as a product of fumarole activity, on cavernous leucotephritic lava

Physical Properties of Challacolloite

Adamantine
Colour:
Colourless to white
Hardness (Mohs):
2 - 3
Density:
4.77 g/cm3 (Calculated)

Crystallography of Challacolloite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Cell Parameters:
a = 8.864Å, b = 7.932Å, c = 12.491Å
β = 90.153°
Ratio:
a:b:c = 1.117 : 1 : 1.575
Unit Cell Volume:
V 878.2 ų
Z:
4
X-Ray Powder Diffraction Data:
d-spacingIntensity
3.686 (100)
3.609 (49)
2.669 (42)
8.855 (39)
3.961 (31)
Comments:
Format: d/Å (I/%) (hkl)

Optical Data of Challacolloite

Type:
Biaxial (+)
RI values:
nα = 2.004 nβ = 2.010 nγ = 2.024
2V:
Calculated: 67°
Max Birefringence:
δ = 0.020
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Very High

Chemical Properties of Challacolloite

Formula:
KPb2Cl5
All elements listed in formula:

Relationship of Challacolloite to other Species

3.AA.05MarshiteCuI
3.AA.05Miersite(Ag,Cu)I
3.AA.05NantokiteCuCl
3.AA.05UM1999-11:I:CuSCu(I,S)
3.AA.10IodargyriteAgI
3.AA.10Tocornalite(Ag,Hg)I
3.AA.15BromargyriteAgBr
3.AA.15ChlorargyriteAgCl
3.AA.20CarobbiiteKF
3.AA.20GriceiteLiF
3.AA.20HaliteNaCl
3.AA.20SylviteKCl
3.AA.20VilliaumiteNaF
3.AA.25SalammoniacNH4Cl
3.AA.25UM1998-03-Cl:TlTlCl
3.AA.25LafossaiteTl(Cl,Br)
3.AA.30Calomel(Hg22+)Cl2
3.AA.30Kuzminite(Hg22+)(Br,Cl)2
3.AA.30Moschelite(Hg22+)I2
3.AA.35NeighboriteNaMgF3
3.AA.40ChlorocalciteKCaCl3
3.AA.45KolaritePbTeCl2
3.AA.50RadhakrishnaitePbTe3(Cl,S)2
3.AA.60HephaistositeTlPb2Cl5

Other Names for Challacolloite

Name in Other Languages:
Simplified Chinese:氯钾铅矿
Traditional Chinese:氯鉀鉛礦

Other Information

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 Challacolloite

Reference List:
J. Schlüter, D. Pohl and S. Britvin (2005): The new mineral challacolloite, KPb2Cl5, the natural occurrence of a technically known laser material. N. Jb. Min. Abh. 182, 95-101.

Mitolo D., Pinto D., Garavelli A., Bindi L. & Vurro F. (2009): The role of the minor substitutions in the crystal structure of natural challacolloite, KPb2Cl5, and hephaistosite, TlPb2Cl5, from Vulcano (Aeolian Archipelago, Italy). Mineralogy and Petrology 96, 121-128.

Internet Links for Challacolloite

Specimens:
The following Challacolloite specimens are currently listed for sale on minfind.com.

Localities for Challacolloite

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.
Chile (TL)
 
  • Tarapacá Region
    • El Tamarugal Province
      • Challacollo
J. Schlüter at al.: N. Jb. Min. Abh. 182(1):95-101 (2005)
Italy
 
  • Campania
    • Naples Province
      • Somma-Vesuvius Complex
Schlüter, J., at al., (2005): The new mineral challacolloite, KPb2Cl5, the natural occurrence of a technically known laser material, N. Jb. Min. Abh. 182(1):95-101
  • Sicily
    • Messina Province
      • Eolie Islands (Aeolian Islands)
        • Lipari
          • Vulcano Island
Mitolo D., Pinto D., Garavelli A., Bindi L. & Vurro F. (2009): The role of the minor substitutions in the crystal structure of natural challacolloite, KPb2Cl5, and hephaistosite, TlPb2Cl5, from Vulcano (Aeolian Archipelago, Italy). Mineralogy and Petrology 96, 121-128.
Japan
 
  • Kyushu Region
    • Nansei Archipelago
      • Kagoshima Prefecture
        • Mishima village
Africano, F., Van Rompaey, G., Bernard, A., Le Guern, F. (2002): Deposition of trace elements from high-temperature gases of Satsuma-Iwojima volcano. Earth, Planets and Space, 54, 275-286.
F. Africano, G. Van Rompaey, A. Bernard, F. Le Guern (2002) Deposition of trace elements from high temperature gases of Satsuma-Iwojima volcano. Earth Planets Space 54, 275-286.
Russia
 
  • Far-Eastern Region
    • Sakhalinskaya Oblast'
      • Kuril Islands
        • Iturup Island
• Tkachenko, S.I., Porter, R.P., Khorzhinskii, M.A., Van Bergen, M.D., Shmulovich, K.I., Shteinberg, G.S. (1999): Ore and mineral formation from high-temperature fumarole gases at Kudryavyi volcano, Iturup island, Kuril Islands. Geokhimika, 4, 410-422.
Mineral and/or Locality  
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