Nuffieldite (original) (raw)

A valid IMA mineral species

About NuffielditeHide

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Formula:

Cu1.4Pb2.4Bi2.4Sb0.2S7

According to several studies, Sb is an essential component for the stabilisation of nuffieldite.

Colour:

Shiny lead-gray to steel-gray on fresh surface, tarnishes to pale iridescent grayish green to reddish brown.

Crystal System:

Orthorhombic

Name:

Named in 1968 by Paul William Errol Kingston in honor of Professor Edward Wilfrid Nuffield [April 13, 1914 Gretna, Manitoba, Canada - June 10, 2006 Vancouver, British Columbia, Canada] mineralogist of the University of Toronto, Ontario, Canada.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:2941:0

2f1c85df-707c-4122-91a9-1fe9e0dff756

IMA Classification of NuffielditeHide

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IMA Formula:

Cu1.4Pb2.4Bi2.4Sb0.2S7

Type description reference:

Classification of NuffielditeHide

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2.JB.25g

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
J : Sulfosalts of PbS archetype
B : Galena derivatives, with Pb

3.3.4.1

3 : SULFOSALTS
3 : 3 <ø < 4

5.7.10

5 : Sulphosalts - Sulpharsenites and Sulphobismuthites (those containing Sn, Ge,or V are in Section 6)
7 : Sulpharsenites etc. of Pb and other metals

Mineral SymbolsHide

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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Pronunciation of NuffielditeHide

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Pronunciation:

Physical Properties of NuffielditeHide

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Colour:

Shiny lead-gray to steel-gray on fresh surface, tarnishes to pale iridescent grayish green to reddish brown.

Streak:

Dark greenish gray to black.

Cleavage:

Very Good
Excellent parallel to [001] and indistinct perpendicular to [001].

Fracture:

Irregular/Uneven, Conchoidal

Density:

7.01(7) g/cm3 (Measured) 7.21 g/cm3 (Calculated)

Optical Data of NuffielditeHide

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Anisotropism:

strong, but with no color effects

Bireflectance:

weak - noticeable only in contact with other grains.

Reflectivity:

Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 46.6%.
R1 shown in black, R2 shown in red

Colour in reflected light:

light gray

Internal Reflections:

none

Pleochroism:

Non-pleochroic

Chemistry of NuffielditeHide

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Mindat Formula:

Cu1.4Pb2.4Bi2.4Sb0.2S7

According to several studies, Sb is an essential component for the stabilisation of nuffieldite.

Crystallography of NuffielditeHide

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Crystal System:

Orthorhombic

Class (H-M):

m m m _(_2/_m_2/_m_2/m ) - Dipyramidal

Cell Parameters:

a = 14.61 Å, b = 21.38 Å, c = 4.03 Å

Ratio:

a:b:c = 0.683 : 1 : 0.188

Unit Cell V:

1,258.82 ų (Calculated from Unit Cell)

Comment:

Non-standard space-group setting Pbnm

Crystal StructureHide

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X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Geological EnvironmentHide

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Type Occurrence of NuffielditeHide

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General Appearance of Type Material:

Prismatic to acicular crystals, deeply striated parallel to [001]. The crystals frequently occur as bundles of parallel unterminated needles (to 3 mm) in the vugs.

Place of Conservation of Type Material:

Canadian Geological Survey, Ottawa, Canada, 13448.
Royal Ontario Museum, Toronto, Canada.

Geological Setting of Type Material:

In quartz veins in quartz diorite.

Associated Minerals at Type Locality:

Reference:

Kingston, P.W. (1968): Studies of mineral sulphosalts. XXI. Nuffieldite, a new species. The Canadian Mineralogist: 9: 439-452.

Synonyms of NuffielditeHide

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Other Language Names for NuffielditeHide

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Varieties of NuffielditeHide

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Common AssociatesHide

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Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

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Other InformationHide

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Health Risks:

No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for NuffielditeHide

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References for NuffielditeHide

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Reference List:

Mozgova, N. N., Nenasheva, S. N., Borodaev, Y. S., & Yudovskaya, M. A. (1994). Nuffieldite from the Maleevskoe massive sulfide deposit, Russia. The Canadian Mineralogist, 32(2), 359-364.

Localities for NuffielditeHide

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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

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- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.