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Samaniite

A valid IMA mineral species
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About SamaniiteHide

06922040015417264341662.jpg
Samani, Japan
Formula:
Cu2Fe5Ni2S8
Colour:
Yellow white
Lustre:
Metallic
Specific Gravity:
4.89 (Calculated)
Crystal System:
Tetragonal
Name:
Named for the town (Samani-cho) and county (Samani-gun) where the mineral was first discovered.

Unique IdentifiersHide

Mindat ID:
32666
Long-form identifier:
mindat:1:1:32666:7
GUID
(UUID V4):
0ad5de11-2adf-4e97-90e6-e77323451119

IMA Classification of SamaniiteHide

Classification of SamaniiteHide

2.BB.

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
2.7.2.4

2 : SULFIDES
7 : AmBnXp, with (m+n):p = 9:8

Mineral SymbolsHide

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

SymbolSourceReference
SmnIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of SamaniiteHide

Metallic
Transparency:
Opaque
Colour:
Yellow white
Hardness:
VHN50=120 - 140 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
4.89 g/cm3 (Calculated)

Optical Data of SamaniiteHide

Anisotropism:
weak dark-gray to light gray
Reflectivity:
WavelengthR1R2
436nm27.1%29.6%
497nm34.4%37.9%
543nm38.9%43.6%
586nm44.9%49.8%
648nm42.2%46.9%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 49.8%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Yellowish white
Internal Reflections:
None observed
Pleochroism:
Weak
Comments:
Yellowish white to pale yellowish white

Chemistry of SamaniiteHide

Mindat Formula:
Cu2Fe5Ni2S8

Crystallography of SamaniiteHide

Crystal System:
Tetragonal
Class (H-M):
4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:
P42/mnm
Setting:
P42/mnm
Cell Parameters:
a = 10.089(1) Å, c = 10.402(1) Å
Ratio:
a:c = 1 : 1.031
Unit Cell V:
1,058.80 ų (Calculated from Unit Cell)
Z:
4

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
5.88 Å(15)
3.118 Å(100)
3.050 Å(20)
1.873 Å(25)
1.844 Å(50)
1.595 Å(45)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 3b: Earth’s earliest hydrosphere>4.45
12 : Hadean hydrothermal subsurface sulfide deposits (see also #33)

Type Occurrence of SamaniiteHide

General Appearance of Type Material:
Anhedral grains to 0.05mm.
Place of Conservation of Type Material:
Tohoku University Museum, Japan.
Geological Setting of Type Material:
Lherzolite inclusions in peridotite.
Associated Minerals at Type Locality:
Reference:
Kitakaze, A., Itoh, H., Komatsu, R. (2011) Horomanite, (Fe,Ni,Co,Cu)9S8, and samaniite, Cu2(Fe,Ni)7S8, new mineral species from the Horoman peridotite massif, Hokkaido, Japan. Journal of Mineralogical and Petrological Sciences: 106: 204-210.

Synonyms of SamaniiteHide

Other Language Names for SamaniiteHide

Japanese:様似鉱

Common AssociatesHide

Associated Minerals Based on Photo Data:
1 photo of Samaniite associated with HoromaniteFe6Ni3S8
1 photo of Samaniite associated with SugakiiteCu(Fe,Ni)8S8

Related Minerals - Strunz-mindat GroupingHide

2.BB.HoromaniteFe6Ni3S8Tet. 4/mmm (4/m 2/m 2/m) : P4/mmm
2.BB.UM2007-27-S:CuFeIrNiRh(Ni,Fe,Cu,Rh,Ir)11S9
2.BB.ArsenotučekiteNi18Sb3AsS16Tet. 4mm : I4mm
2.BB.HrabákiteNi9PbSbS8Tet. 4/mmm (4/m 2/m 2/m) : P4/mmm
2.BB.05HeazlewooditeNi3S2Trig. 3 2 : R3 2
2.BB.05OregoniteNi2FeAs2Hex.
2.BB.05Vozhminite(Ni,Co)4(As,Sb)S2Hex.
2.BB.05UM2007-30-S:FeFe3S2
2.BB.10ArsenohauchecorniteNi18Bi3AsS16Tet.
2.BB.10BismutohauchecorniteNi9Bi2S8Tet. 4/mmm (4/m 2/m 2/m) : P4/mmm
2.BB.10HauchecorniteNi9BiSbS8Tet. 4/mmm (4/m 2/m 2/m) : P4/mmm
2.BB.10TellurohauchecorniteNi9Bi(Te,Bi)S8Tet. 4/mmm (4/m 2/m 2/m) : P4/mmm
2.BB.10TučekiteNi9Sb2S8Tet. 4/mmm (4/m 2/m 2/m) : P4/mmm
2.BB.15ArgentopentlanditeAg(Fe,Ni)8S8Iso. m3m (4/m 3 2/m) : Fm3m
2.BB.15CobaltpentlanditeCo9S8Iso. m3m (4/m 3 2/m) : Fm3m
2.BB.15Geffroyite(Cu,Fe,Ag)9(Se,S)8Iso. m3m (4/m 3 2/m) : Fm3m
2.BB.15Godlevskite(Ni,Fe)9S8Orth. 2 2 2 : C2 2 2
2.BB.15Kharaelakhite(Cu,Pt,Pb,Fe,Ni)9S8Orth. mmm (2/m 2/m 2/m) : Pmmm
2.BB.15Manganoshadlunite(Mn,Pb,Cd)(Cu,Fe)8S8
2.BB.15Pentlandite(NixFey)Σ9S8Iso. m3m (4/m 3 2/m) : Fm3m
2.BB.15Shadlunite(Pb,Cd)(Fe,Cu)8S8Iso. m3m (4/m 3 2/m) : Fm3m
2.BB.15SugakiiteCu(Fe,Ni)8S8Tet. 4/mmm (4/m 2/m 2/m) : P42/mnm
2.BB.15UM2002-26-S:FeNi(Ni,Fe)9S8Hex.
2.BB.15Ferhodsite(Fe,Rh,Ni,Ir,Cu,Pt)9S8Tet.
2.BB.15OberthüriteRh3Ni32S32Iso.

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.

Internet Links for SamaniiteHide

References for SamaniiteHide

Localities for SamaniiteHide

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 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.
Brazil
 
  • Bahia
    • Maracás
      • Rio Jacaré layered complex
Campbell (2012)
Costa Rica
 
  • Guanacaste Province
    • Nicoya Canton
Schwarzenbach et al. (2014) +1 other reference
France
 
  • Auvergne-Rhône-Alpes
    • Ain
      • Bourg-en-Bresse
        • Lescheroux
Ducluzaux B. (2022)
Italy
 
  • Piedmont
    • Vercelli Province
      • Cravagliana
Sessa et al. (2017)
Japan (TL)
 
  • Hokkaidō Prefecture
    • Hidaka Subprefecture
      • Samani District
        • Samani-cho
Kitakaze et al. (2011)
 
Mineral and/or Locality  
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