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Pampaloite

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Formula:
AuSbTe
Lustre:
Metallic
Hardness:
4 - 5
Specific Gravity:
9.33 (Calculated)
Crystal System:
Monoclinic
Name:
Named for the type locality.
New structure type. Compare aurostibite and UM1996-36-Sb:Au.


Hide all sections | Show all sections

Classification of PampaloiteHide

Approved
Approval Year:
2018
Approval History:
IMA No. 2017-096

Physical Properties of PampaloiteHide

Metallic
Transparency:
Opaque
Hardness:
4 - 5 on Mohs scale
Hardness:
VHN25=276 kg/mm2 - Vickers
Tenacity:
Brittle
Density:
9.33 g/cm3 (Calculated)

Optical Data of PampaloiteHide

Type:
Anisotropic
Anisotropism:
strong blue to light brown rotation tints
Bireflectance:
medium to strong
Colour in reflected light:
white
Internal Reflections:
none
Pleochroism:
Weak
Comments:
slightly pinkish-brown to slightly bluish white

Chemical Properties of PampaloiteHide

Formula:
AuSbTe

Crystallography of PampaloiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Setting:
C2/c
Cell Parameters:
a = 11.947(3) Å, b = 4.481(1) Å, c = 12.335(3) Å
β = 105.83(2)°
Ratio:
a:b:c = 2.666 : 1 : 2.753
Unit Cell V:
635.30 ų (Calculated from Unit Cell)
Z:
3

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.846Å(24)
3.825Å(18)
2.978Å(100)
2.968Å(50)
2.242Å(25)
2.144Å(55)
2.063Å(33)
1.789Å(18)

Geological EnvironmentHide

Paragenetic Mode(s):

Type Occurrence of PampaloiteHide

General Appearance of Type Material:
anhedral grains (up to about 20 μm) intergrown with gold, frohbergite and altaite.
Place of Conservation of Type Material:
Department of Earth Sciences of the Natural History Museum, London, UK, catalogue No BM 2017, 16.
Associated Minerals at Type Locality:

Synonyms of PampaloiteHide

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 PampaloiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Vymazalová, A., Kojonen, K., Laufek, F., Johanson, B., Stanley, C.J., Plášil, J. and Halodová, P. (2018) Pampaloite, IMA 2017-096. CNMNC Newsletter No. 41, February 2018, page 184; European Journal of Mineralogy: 30: 183-186.
Vymazalová, A., Kojonen, K., Laufek, F., Johanson, B., Stanley, C. J., Plášil, J., & Halodová, P. (2019). Pampaloite, AuSbTe, a new mineral from Pampalo gold mine, Finland. Mineralogical Magazine, 83(3), 393-400.

Internet Links for PampaloiteHide

Localities for PampaloiteHide

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.
Finland (TL)
 
  • North Karelia
    • Ilomantsi
Vymazalová, A., Kojonen, K., Laufek, F., Johanson, B., Stanley, C.J., Plášil, J. and Halodová, P. (2018) Pampaloite, IMA 2017-096. CNMNC Newsletter No. 41, February 2018, page 184; European Journal of Mineralogy: 30: 183-186.; Vymazalová, A., Kojonen, K., Laufek, F., Johanson, B., Stanley, C. J., Plášil, J., & Halodová, P. (2019). Pampaloite, AuSbTe, a new mineral from Pampalo gold mine, Finland. Mineralogical Magazine, 83(3), 393-400.
 
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