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Challacolloite

Big Photo

La Fossa Crater, Vulcano Island, Eolie Islands (Aeolian Islands), Lipari, Messina Province, Sicily, Italy
© Stephan Wolfsried

Show Challacolloite Photos (12)
Formula:
KPb
 
2
Cl
 
5
System:MonoclinicColour:Colourless to white
Hardness:2 - 3
Name:Named after its type locality
Isostructural with:Hephaistosite


The K analogue of hephaistosite.

Classification of Challacolloite

IMA status:Approved 2005
Nickel-Strunz 10th (pending) edition ID:3.AA.55

3 : HALIDES
A : Simple halides, without H2O
A : M:X = 1:1, 2:3, 3:5, etc.
Dana 8th edition ID:11.4.2.1

11 : HALIDE COMPLEXES
4 : AmBX5·xH2O
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Type Occurrence of Challacolloite

Type Locality:Lolon Mine (Challacollo Mine), Challacollo, Iquique Province, Tarapacá Region, Chile
General Appearance of Type Material:thin crusts
Geological Setting of type material:hydrothermal phases
Associated Minerals at type locality:
Cotunnite

Occurrences of Challacolloite

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

Physical Properties of Challacolloite

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

Crystallography of Challacolloite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:P21/b {P1 1 21/b} {P21/c} {P1 21/c 1} {P21/a}
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:
d-spacingIntensity
3.686 (100)
3.609 (49)
2.669 (42)
8.855 (39)
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°
Maximum Birefringence:δ = 0.020

Chart 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:
KPb
 
2
Cl
 
5
All elements listed in formula:Cl, K, Pb

Relationship of Challacolloite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
3.AA.05Marshite
CuI
3.AA.05Miersite
(Ag,Cu)I
3.AA.05Nantokite
CuCl
3.AA.05UM1999-11:I:CuS
Cu(I,S)
3.AA.10Iodargyrite
AgI
3.AA.10Tocornalite
(Ag,Hg)I
3.AA.15Bromargyrite
AgBr
3.AA.15Chlorargyrite
AgCl
3.AA.20Carobbiite
KF
3.AA.20Griceite
LiF
3.AA.20Halite
NaCl
3.AA.20Sylvite
KCl
3.AA.20Villiaumite
NaF
3.AA.25Salammoniac
NH
 
4
Cl
3.AA.25UM1998-03-Cl:Tl
TlCl
3.AA.25Lafossaite
Tl(Cl,Br)
3.AA.30Calomel
Hg
 
2
Cl
 
2
3.AA.30Kuzminite
Hg
 
2
(Br,Cl)
 
2
3.AA.30Moschelite
Hg
 
2
I
 
2
3.AA.35Neighborite
NaMgF
 
3
3.AA.40Chlorocalcite
KCaCl
 
3
3.AA.45Kolarite
PbTeCl
 
2
3.AA.50Radhakrishnaite
PbTe
 
3
(Cl,S)
 
2
3.AA.60Hephaistosite
TlPb
 
2
Cl
 
5

Other Names for Challacolloite

Synonyms:
IMA2004-028
Other Languages:

Other Information

Health Warning: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

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    Localities for Challacolloite

    Hide Locality List
    The 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. ? 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
     
    • Tarapacá Region
      • Iquique 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
        • Lipari
          • Eolie Islands (Aeolian Islands)
            • 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
     
    • Nansei Archipelago
      • Kagoshima Prefecture
    		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.
    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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