Kufahrite
A valid IMA mineral species
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Fahrid Kutyev
Formula:
PtPb
Colour:
White
Lustre:
Metallic
Hardness:
4 - 4½
Specific Gravity:
14.80 (Calculated)
Crystal System:
Hexagonal
Name:
Named in honour of Fahrid Shakirovitch Kutyev (Фарид Шакирович Кутыев) (26 February 1943 ‒ 29 March 1993), geologist from the Institute of Volcanology of USSR Academy of Sciences, who played a key role in the discovery of the Koryak-Kamchatka Platinum Belt, including the Ledyanoy Creek placer platinum deposit, where the mineral was discovered. The name is pronounced (ku fa rait).
Known synthetic analogue. First natural Pt-Pb alloy.
Unique Identifiers
Mindat ID:
55104
Long-form identifier:
mindat:1:1:55104:1
GUID
(UUID V4):
(UUID V4):
188fd406-8ccf-4cd7-a2bd-03785f73e006
IMA Classification of Kufahrite
Approved
Approval year:
2020
First published:
2021
Classification of Kufahrite
1.A0.
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
A : Metals and Intermetallic Alloys
0 :
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
A : Metals and Intermetallic Alloys
0 :
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Kuf | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Kufahrite
Metallic
Transparency:
Opaque
Colour:
White
Hardness:
4 - 4½ on Mohs scale
Hardness:
VHN100=262 - 320 - Vickers
Tenacity:
Malleable
Density:
14.80 g/cm3 (Calculated)
Optical Data of Kufahrite
Anisotropism:
Moderate, light brown to gray
Bireflectance:
Strong, ∆R = 5.03% (589 nm)
Reflectivity:
| Wavelength | R1 | R2 |
|---|---|---|
| 400nm | 46.36% | 49.17% |
| 440nm | 45.84% | 47.72% |
| 470nm | 47.11% | 50.26% |
| 500nm | 49.18% | 52.98% |
| 546nm | 52.73% | 57.14% |
| 589nm | 55.56% | 60.59% |
| 620nm | 57.31% | 62.05% |
| 650nm | 57.73% | 63.27% |
| 700nm | 58.30% | 63.86% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 63.86%.
R1 shown in black, R2 shown in red
Colour in reflected light:
White
Internal Reflections:
None
Pleochroism:
Weak
Comments:
White to greyish-white
Chemistry of Kufahrite
Mindat Formula:
PtPb
Elements listed:
Crystallography of Kufahrite
Crystal System:
Hexagonal
Class (H-M):
6/mmm (6/m 2/m 2/m) - Dihexagonal Dipyramidal
Space Group:
P63/mmc
Setting:
P63/mmc
Cell Parameters:
a = 4.2492(6) Å, c = 5.486(6) Å
Ratio:
a:c = 1 : 1.291
Unit Cell V:
85.78 ų
Z:
2
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.052 Å | (80) |
| 2.197 Å | (100) |
| 2.125 Å | (28) |
| 1.747 Å | (18) |
| 1.528 Å | (35) |
| 1.350 Å | (14) |
| 1.240 Å | (18) |
| 0.958 Å | (22) |
Comments:
From Type Description.
Type Occurrence of Kufahrite
General Appearance of Type Material:
Alteration rims which are formed together with tetraferroplatinum after isoferroplatinum, or as grains up to 150 µm in size.
Place of Conservation of Type Material:
Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number 5576/1
Geological Setting of Type Material:
Found in isoferroplatinum grains from heavy-mineral concentrates.
Associated Minerals at Type Locality:
Reference:
Sidorov, E.G., Kutyrev, A.V., Zhitova, E.S., Agakhanov, A.A., Sandimirova, E.I., Vymazalova, A., Chubarov, V.M., Zolotarev , A.A. (2021) Kufahrite, PtPb, a new mineral from Ledyanoy Creek placer, Galmoenan ultramafic complex, Koryak Highlands, Russia. Mineralogical Magazine: 85(2): 254-261.
Synonyms of Kufahrite
Related Minerals - Strunz-mindat Grouping
| 1.A0. | Kitagohaite | Pt7Cu |
Other Information
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 Kufahrite
mindat.org URL:
https://www.mindat.org/min-55104.html
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References for Kufahrite
Reference List:
forum.amiminerals.it (n.d.) http://forum.amiminerals.it/viewtopic.php?f=5&t=16866&sid=77360803ea83bc7544f9410d4a48da66
Localities for Kufahrite
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Russia (TL) | |
|
