Sugakiite
A valid IMA mineral species
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About Sugakiite
Asahiko Sugaki
Formula:
Cu(Fe,Ni)8S8
Colour:
Reddish yellow
Lustre:
Metallic
Specific Gravity:
4.71 (Calculated)
Crystal System:
Tetragonal
Member of:
Name:
Named for Dr. Asahiko Sugaki (苣木浅彦) (23 February 1923, Saga Prefecture, Japan - 22 April 2010), professor of Tohoku University, specialist in ore deposits, especially experimental studies on sulphide phase equilibria.
Cu analogue of Argentopentlandite. Compositionally similar to samaniite.
Compare, e.g., 'UM1988-19-S:CuFeNiPdRu'.
Compare, e.g., 'UM1988-19-S:CuFeNiPdRu'.
Unique Identifiers
Mindat ID:
29106
Long-form identifier:
mindat:1:1:29106:0
GUID
(UUID V4):
(UUID V4):
2f0c87b6-c71a-45bc-8d30-beb901f34239
IMA Classification of Sugakiite
Classification of Sugakiite
2.BB.15
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
B : Metal Sulfides, M: S > 1: 1 (mainly 2: 1)
B : With Ni
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
B : Metal Sulfides, M: S > 1: 1 (mainly 2: 1)
B : With Ni
2.7.2.2
2 : SULFIDES
7 : AmBnXp, with (m+n):p = 9:8
2 : SULFIDES
7 : AmBnXp, with (m+n):p = 9:8
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 |
|---|---|---|
| Sgk | 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 Sugakiite
Metallic
Transparency:
Opaque
Colour:
Reddish yellow
Hardness:
VHN50=130 - 170 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
4.71 g/cm3 (Calculated)
Comment:
Could not be measured due to small grain size.
Optical Data of Sugakiite
Anisotropism:
Very weak, dark gray to faint light gray.
Reflectivity:
| Wavelength | R1 | R2 |
|---|---|---|
| 436nm | 25.6% | 31.9% |
| 497nm | 29.9% | 36.1% |
| 543nm | 33.2% | 39.1% |
| 586nm | 36.1% | 41.5% |
| 648nm | 39.3% | 44.3% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 44.3%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Creamy-white with a reddish tint.
Internal Reflections:
None.
Pleochroism:
Non-pleochroic
Chemistry of Sugakiite
Mindat Formula:
Cu(Fe,Ni)8S8
Elements listed:
Crystallography of Sugakiite
Crystal System:
Tetragonal
Class (H-M):
4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:
P42/mnm
Cell Parameters:
a = 10.566 Å, c = 9.749 Å
Ratio:
a:c = 1 : 0.923
Unit Cell V:
1,088.38 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.072 Å | (100) |
| 1.793 Å | (85) |
| 1.804 Å | (83) |
| 3.061 Å | (74) |
| 1.954 Å | (42) |
| 1.962 Å | (38) |
| 2.641 Å | (33) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 3b: Earth’s earliest hydrosphere | >4.45 |
| 12 : Hadean hydrothermal subsurface sulfide deposits (see also #33) |
Type Occurrence of Sugakiite
General Appearance of Type Material:
Anhedral grains, 0.05–0.1 mm across, filling interstices of olivine, clinopyroxene and orthopyroxene aggregates, along with other sulfides and native copper.
Place of Conservation of Type Material:
Tohoku University Museum, Sendai, Japan
Geological Setting of Type Material:
Ultrabasic rock.
Associated Minerals at Type Locality:
Synonyms of Sugakiite
Other Language Names for Sugakiite
Relationship of Sugakiite to other Species
Member of:
Other Members of this group:
| Argentopentlandite | Ag(Fe,Ni)8S8 | Iso. m3m (4/m 3 2/m) : Fm3m |
| Cobaltpentlandite | Co9S8 | Iso. m3m (4/m 3 2/m) : Fm3m |
| Geffroyite | (Cu,Fe,Ag)9(Se,S)8 | Iso. m3m (4/m 3 2/m) : Fm3m |
| Oberthürite | Rh3Ni32S32 | Iso. |
| Pentlandite | (NixFey)Σ9S8 | Iso. m3m (4/m 3 2/m) : Fm3m |
| Shadlunite | (Pb,Cd)(Fe,Cu)8S8 | Iso. m3m (4/m 3 2/m) : Fm3m |
Common Associates
Associated Minerals Based on Photo Data:
| 1 photo of Sugakiite associated with Horomanite | Fe6Ni3S8 |
| 1 photo of Sugakiite associated with Samaniite | Cu2Fe5Ni2S8 |
Related Minerals - Strunz-mindat Grouping
| 2.BB. | Horomanite | Fe6Ni3S8 |
| 2.BB. | Samaniite | Cu2Fe5Ni2S8 |
| 2.BB. | UM2007-27-S:CuFeIrNiRh | (Ni,Fe,Cu,Rh,Ir)11S9 |
| 2.BB. | Arsenotučekite | Ni18Sb3AsS16 |
| 2.BB. | Hrabákite | Ni9PbSbS8 |
| 2.BB.05 | Heazlewoodite | Ni3S2 |
| 2.BB.05 | Oregonite | Ni2FeAs2 |
| 2.BB.05 | Vozhminite | (Ni,Co)4(As,Sb)S2 |
| 2.BB.05 | UM2007-30-S:Fe | Fe3S2 |
| 2.BB.10 | Arsenohauchecornite | Ni18Bi3AsS16 |
| 2.BB.10 | Bismutohauchecornite | Ni9Bi2S8 |
| 2.BB.10 | Hauchecornite | Ni9BiSbS8 |
| 2.BB.10 | Tellurohauchecornite | Ni9Bi(Te,Bi)S8 |
| 2.BB.10 | Tučekite | Ni9Sb2S8 |
| 2.BB.15 | Argentopentlandite | Ag(Fe,Ni)8S8 |
| 2.BB.15 | Cobaltpentlandite | Co9S8 |
| 2.BB.15 | Geffroyite | (Cu,Fe,Ag)9(Se,S)8 |
| 2.BB.15 | Godlevskite | (Ni,Fe)9S8 |
| 2.BB.15 | Kharaelakhite | (Cu,Pt,Pb,Fe,Ni)9S8 |
| 2.BB.15 | Manganoshadlunite | (Mn,Pb,Cd)(Cu,Fe)8S8 |
| 2.BB.15 | Pentlandite | (NixFey)Σ9S8 |
| 2.BB.15 | Shadlunite | (Pb,Cd)(Fe,Cu)8S8 |
| 2.BB.15 | UM2002-26-S:FeNi | (Ni,Fe)9S8 |
| 2.BB.15 | Ferhodsite | (Fe,Rh,Ni,Ir,Cu,Pt)9S8 |
| 2.BB.15 | Oberthürite | Rh3Ni32S32 |
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 Sugakiite
mindat.org URL:
https://www.mindat.org/min-29106.html
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References for Sugakiite
Localities for Sugakiite
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.
Costa Rica | |
| Schwarzenbach et al. (2014) +1 other reference |
Japan | |
| Weiss (2012) |
| Kitakaze (1998) +1 other reference |
Russia | |
| Weiss (2012) |
South Africa | |
| McCreesh et al. (2018) |
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Horoman peridotite body, Samani-cho, Samani District, Hidaka Subprefecture, Hokkaidō Prefecture, Japan