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Museumite

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Formula:
[Pb2(Pb,Sb)2S8][(Te,Au)2]
Colour:
dark silver-grey
Lustre:
Metallic
Hardness:
1 - 1½
Crystal System:
Monoclinic
Name:
found at an old museum sample and named museumite to give proper credit to all museums in the world preserving their old samples with care and accuracy
anhedral to subhedral grains up to 300 µm in size in cavities and vugs of nagyagite crystals


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Classification of MuseumiteHide

Approved
Approval Year:
2003
2.HB.20c

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

Physical Properties of MuseumiteHide

Metallic
Transparency:
Opaque
Colour:
dark silver-grey
Streak:
grey-black
Hardness:
1 - 1½ on Mohs scale
Hardness:
VHN15=41 - 44 kg/mm2 - Vickers
Hardness Data:
Measured
Cleavage:
Perfect
on {001}
Fracture:
Hackly

Optical Data of MuseumiteHide

Type:
Anisotropic
Anisotropism:
distinct
Bireflectance:
very low
Colour in reflected light:
greyish white
Pleochroism:
Weak

Chemical Properties of MuseumiteHide

Formula:
[Pb2(Pb,Sb)2S8][(Te,Au)2]

Crystallography of MuseumiteHide

Crystal System:
Monoclinic
Class (H-M):
2 - Sphenoidal
Cell Parameters:
a = 4.361 Å, b = 6.618 Å, c = 20.858 Å
β = 92.71°
Ratio:
a:b:c = 0.659 : 1 : 3.152
Unit Cell V:
601.3 ų

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.80 (50)
3.56 (100)
3.47 (60)
2.99 (50)

Type Occurrence of MuseumiteHide

General Appearance of Type Material:
anhedral to subhedral grains up to 300 µm in size in cavities and vugs of nagyagite crystals
Geological Setting of Type Material:
in a hydrothermal (epithermal) vein in quartz-andesite
Associated Minerals at Type Locality:

Synonyms of MuseumiteHide

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.20eLitochlebiteAg2PbBi4Se8Mon. 2/m : P21/m

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 MuseumiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
L. BINDI, C. CIPRIANI (2004): Museumite, Pb5AuSbTe2S12, a new mineral from the gold telluride deposit of Sacarîmb, Metaliferi Mountains, western Romania.- European Journal of Mineralogy 16, 835-838.

Internet Links for MuseumiteHide

Localities for MuseumiteHide

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.
Romania (TL)
 
  • Hunedoara Co.
    • Deva
L. Bindi & C. Cipriani (2004) Eur. J. Mineral. 16, 835-838
Mineral and/or Locality  
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