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Litochlebite

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About LitochlebiteHide

Jiří Litochleb
Formula:
Ag2PbBi4Se8
Colour:
dark grey to black
Lustre:
Metallic
Hardness:
3
Specific Gravity:
7.90 (Calculated)
Crystal System:
Monoclinic
Name:
Honors the Czech mineralogist Dr. Jiří Litochleb (1948 - 2014), former head of the Department of Mineralogy and Petrology and director of the Natural History Museum, National Museum, Praha, Czech Republic. Dr. Litochleb was the author of numerous papers on uranium, base metal, and gold ore deposits and on the mineralogy of Bi sulfo-seleno-tellurides, selenides, and sulfosalts from the Czech Republic.
Ag-analog of watkinsonite.
Structurally related to berryite.


Classification of LitochlebiteHide

Approved
Approval Year:
2009
2.HB.20e

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
H : Sulfosalts of SnS archetype
B : With Cu, Ag, Fe, Sn and Pb
3.7.21.2

3 : SULFOSALTS
7 : ø = 2

Physical Properties of LitochlebiteHide

Metallic
Transparency:
Opaque
Colour:
dark grey to black
Streak:
dark grey
Hardness:
Hardness:
VHN10=230 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
7.90 g/cm3 (Calculated)

Optical Data of LitochlebiteHide

Type:
Anisotropic
Anisotropism:
anisotropy is moderate both in air and in oil
Bireflectance:
weak only in oil
Colour in reflected light:
white
Internal Reflections:
none
Pleochroism:
Visible
Comments:
White with a very faint yellowish tint (darkest position) to white with a very faint bluish tint (lightest position)


Chemical Properties of LitochlebiteHide

Formula:
Ag2PbBi4Se8

Crystallography of LitochlebiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Cell Parameters:
a = 13.182(2) Å, b = 4.140(8) Å, c = 15.299(2) Å
β = 109.11(1)°
Ratio:
a:b:c = 3.184 : 1 : 3.695
Unit Cell V:
788.91 ų (Calculated from Unit Cell)
Z:
2

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.684 (53)
3.625 (39)
3.201 (76)
3.028 (100)
2.980 (88)
2.892 (95)
2.822 (35)
2.094 (31)

Type Occurrence of LitochlebiteHide

General Appearance of Type Material:
irregular grains up to 200μm, forming aggregates up to 1–2 mm in size in a quartz gangue.
Place of Conservation of Type Material:
National Museum, Prague, Czech Republic (catalogue number P1P 11/2009).
Geological Setting of Type Material:
Uranium veins of the five-element class (U-Ni-Co-As-Ag)
Associated Minerals at Type Locality:

Synonyms of LitochlebiteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Quartz1 photo of Litochlebite associated with Quartz on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

2.HB.Carducciite(Ag2Sb2)Pb12(As,Sb)16S40Mon. 2/m : P21/b
2.HB.05aAikinitePbCuBiS3Orth. mmm (2/m 2/m 2/m) : Pnma
2.HB.05aFriedrichitePb5Cu5Bi7S18Orth. mm2
2.HB.05aGladitePbCuBi5S9Orth. mmm (2/m 2/m 2/m)
2.HB.05aHammaritePb2Cu2Bi4S9Orth.
2.HB.05cJaskólskiiteCuxPb2+x(Sb,Bi)2-xS5 (x ~ 0.15)Orth.
2.HB.05aKrupkaitePbCuBi3S6Orth.
2.HB.05aLindströmitePb3Cu3Bi7S15Orth. mmm (2/m 2/m 2/m)
2.HB.05bMeneghinitePb13CuSb7S24Orth. mmm (2/m 2/m 2/m)
2.HB.05aPekoitePbCuBi11(S,Se)18Orth.
2.HB.05aEmilitePb2.7Cu2.7Bi5.3S12Orth. mm2
2.HB.05UM2000-46-S:BiCuPbCu0.33Pb0.33Bi7.67S12
2.HB.05aSalzburgitePb1.6Cu1.6Bi6.4S12Orth. mm2
2.HB.05UM1990-54-Se:BiCuPbCuPb(Ni,Co)0.3Bi3Se6
2.HB.05aPaaritePb1.7Cu1.7Bi6.3S12Orth. mmm (2/m 2/m 2/m)
2.HB.10cEclarite(Cu,Fe)Pb9Bi12S28Orth. mmm (2/m 2/m 2/m) : Pnma
2.HB.10bGiessenitePb27Cu2(Bi,Sb)19S57Mon. 2/m
2.HB.10bIzoklakeitePb27(Cu,Fe,Ag)2(Sb,Bi)19S57Orth.
2.HB.10aKobellitePb22Cu4(Bi,Sb)30S69Orth. mmm (2/m 2/m 2/m) : Pnnm
2.HB.10aTintinaitePb22Cu4(Sb,Bi)30S69Orth. mmm (2/m 2/m 2/m) : Pnnm
2.HB.15BenavidesitePb4MnSb6S14Mon. 2/m : P21/b
2.HB.15JamesonitePb4FeSb6S14Mon. 2/m : P21/b
2.HB.20dBerryiteCu3Ag2Pb3Bi7S16Mon. 2/m : P21/m
2.HB.20bBuckhorniteAuPb2BiTe2S3Orth.
2.HB.20aNagyágite[Pb3(Pb,Sb)3S6](Au,Te)3Mon. 2/m : P21/m
2.HB.20eWatkinsoniteCu2PbBi4(Se,S,Te)8Mon.
2.HB.20cMuseumite[Pb2(Pb,Sb)2S8][(Te,Au)2]Mon. 2

Related Minerals - Dana Grouping (8th Ed.)Hide

3.7.21.1WatkinsoniteCu2PbBi4(Se,S,Te)8Mon.

Fluorescence of LitochlebiteHide

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 LitochlebiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Sejkora, J., Makovicky, E., Topa, D., Putz, H., Zagler, G. Plasil, J. (2011) Litochlebite, Ag2PbBi4Se8, a new mineral species from Zálesí, Czech Republic: description and crystal-structure determination. Canadian Mineralogist: 49: 639-650.

Internet Links for LitochlebiteHide

Localities for LitochlebiteHide

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.
Czech Republic (TL)
 
  • Olomouc Region
    • Javorník (Jauernig)
Sejkora, J., Makovicky, E., Topa, D., Putz, H., Zagler, G. Plasil, J. (2011): Litochlebite, Ag2PbBi4Se8, a new mineral species from Zálesí, Czech Republic: description and crystal-structure determination. Canadian Mineralogist, 49, 639-650.
Mineral and/or Locality  
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