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Parkerite
A valid IMA mineral species - grandfathered
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About Parkerite
Formula:
Ni3(Bi,Pb)2S2
May be Pb-free.
Colour:
Pale bronze
Lustre:
Metallic
Hardness:
2
Specific Gravity:
8.4
Crystal System:
Monoclinic
Name:
For mineralogist/petrologist Robert Lüling Parker (1893-1973) Prof. für Mineralogie und Petrographie ETH Zürich, Switzerland.
Comments: The name parkerite was given to mineral-G, a poorly and incompletely characterized species from S. Africa by Scholz (1937). The mineral was presented by Scholz as a nickel sulfide with a suggested formula of Ni2S3 or NiS2, and inexplicably without the Bi (51-64%) and Pb (~9%) being detected. In his study of the ore minerals of the Sudbury area, Michener (1940) noticed a nickel-bismuth sulfide mineral, which appeared to be a new species. The mineral was further investigated by Michener & Peacock (1943), who realized that although the composition and other data did not match that given by Scholz for parkerite, their X-ray powder data was in agreement with the data of Niggli for parkerite, which was appended to Scholz (1937). Rather than describing their mineral as a new species, they fully characterized and redefined it retaining the name parkerite on a specimen from the Frood mine, as well as using synthetic material, retaining the parkerite name given by Scholz (Michener & Peacock 1943). The Frood mine could not be specifically identified by Michener & Peacock at the time due to wartime restrictions. Additional data on parkerite from both type localities are given in Petruk et al. (1969). [Horváth 2003]
Comments: The name parkerite was given to mineral-G, a poorly and incompletely characterized species from S. Africa by Scholz (1937). The mineral was presented by Scholz as a nickel sulfide with a suggested formula of Ni2S3 or NiS2, and inexplicably without the Bi (51-64%) and Pb (~9%) being detected. In his study of the ore minerals of the Sudbury area, Michener (1940) noticed a nickel-bismuth sulfide mineral, which appeared to be a new species. The mineral was further investigated by Michener & Peacock (1943), who realized that although the composition and other data did not match that given by Scholz for parkerite, their X-ray powder data was in agreement with the data of Niggli for parkerite, which was appended to Scholz (1937). Rather than describing their mineral as a new species, they fully characterized and redefined it retaining the name parkerite on a specimen from the Frood mine, as well as using synthetic material, retaining the parkerite name given by Scholz (Michener & Peacock 1943). The Frood mine could not be specifically identified by Michener & Peacock at the time due to wartime restrictions. Additional data on parkerite from both type localities are given in Petruk et al. (1969). [Horváth 2003]
See also "lead-parkerite" and the chemically related bismutohauchecornite.
An Sb-bearing parkerite has been reported, too (Goryachev et al., 2004).
An Sb-bearing parkerite has been reported, too (Goryachev et al., 2004).
Unique Identifiers
Mindat ID:
3122
Long-form identifier:
mindat:1:1:3122:2
Similar Names
| Harkerite | A valid IMA mineral species - grandfathered | Ca48Mg16[AlSi4O15(OH)]4(BO3)16(CO3)16 · 2(H2O,HCl) |
IMA Classification of Parkerite
Approved, 'Grandfathered' (first described prior to 1959)
First published:
1937
Mn deposit, Dürnstein, Neumarkt in der Steiermark, Murau District, Styria, Austria