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Ferrodimolybdenite

A valid IMA mineral species
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Formula:
FeMo2S4
Colour:
grey
Lustre:
Metallic
Hardness:
3
Specific Gravity:
5.445 (Calculated)
Crystal System:
Monoclinic
Name:
The mineral name ferrodimolybdenite is derived from its composition and structure: “ferro” refers to Fe2+, while “di+molybdenite” indicates the presence of two MoS2 layers.
Not unique in terms of chemical combination (compare maikainite).

Known synthetic analogue.


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Unique IdentifiersHide

Mindat ID:
470830
Long-form identifier:
mindat:1:1:470830:4

IMA Classification of FerrodimolybdeniteHide

Classification of FerrodimolybdeniteHide

Strunz-mindat (2026):
2.DA.

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
D : Metal Sulfides, M: S = 3 :4 and 2:3
A : M:S = 3:4

Mineral SymbolsHide

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

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

Physical Properties of FerrodimolybdeniteHide

Lustre:
Metallic
Transparency:
Opaque
Colour:
Grey
Streak:
dark grey
Hardness:
3 on Mohs scale
Tenacity:
Sectile
Cleavage:
Perfect
cleavage in three directions: perfect on {001}, good on {100} and poor on {010}
Fracture:
Conchoidal
Comment:
smooth
Density:
5.445 g/cm3 (Calculated)

Optical Data of FerrodimolybdeniteHide

Anisotropism:
strong
Reflectivity:
WavelengthR1 (%)R2 (%)
400nm35.7% 34.2%
420nm35.8% 34.3%
440nm35.9% 34.3%
460nm36.0% 34.4%
560nm36.9% 35.1%
580nm37.1% 35.7%
589nm37.3% 35.9%
600nm37.8% 36.0%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 37.8%.
R1 shown in black, R2 shown in red
Colour in reflected light:
grey to light grey with a bluish tinge
Internal Reflections:
none

Chemistry of FerrodimolybdeniteHide

Mindat Formula:
FeMo2S4
Element Weights:
Element% weight
Mo51.039 %
S34.109 %
Fe14.851 %

Calculated from ideal end-member formula.
Mo
S
Fe
Elements listed:
Fe, Mo, S - search for minerals with similar chemistry

Crystallography of FerrodimolybdeniteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Setting:
C2/c
Cell Parameters:
a = 11.8249(8) Å, b = 6.5534(3) Å, c = 13.005(1) Å
β = 114.479(9)°
Ratio:
a:b:c = 1.804 : 1 : 1.984
Unit Cell V:
917.21 ų (Calculated from Unit Cell)
Z:
8

X-Ray Powder DiffractionHide

Type Occurrence of FerrodimolybdeniteHide

Type Locality:
ⓘ Deynekoite type locality, Daba-Siwaqa complex, Transjordan Plateau, Amman Governorate, Jordan
General Appearance of Type Material:
platy crystals with dimensions ranging from 3×100 µm to 20×40 µm.
Place of Conservation of Type Material:
collections of the Fersman Mineralogical Museum, Russian
Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 115162, Russia, registration number 6005/1
Geological Setting of Type Material:
was discovered in a differentiated sulfide nodule composed of troilite and pentlandite parts. The nodule was detected in the central zone of a diopside-anorthite-tridymite oval paralava body, approximately 30 metres in diameter, within the pyrometamorphic Hatrurim Complex in Daba-Siwaqa, Jordan.
Associated Minerals at Type Locality:
GalenaMolybdeniteNickelphosphidePentlanditeRudashevskyite
TetrataeniteTroilite
Reference:
Galuskin, Evgeny V.; Galuskina, Irina O.; Kusz, Joachim; Książek, Maria; Vapnik, Yevgeny; Zieliński, Grzegorz (2025) Ferrodimolybdenite, FeMo3+2S4 from Daba-Siwaqa, Jordan – the first natural compound of trivalent molybdenum. Mineralogical Magazine, 89 (2). 242-249 doi:10.1180/mgm.2024.82

Other Language Names for FerrodimolybdeniteHide

Related Minerals - Strunz-mindat GroupingHide

2.DA.ZaykoviteRh3Se4Mon. 2/m : B2/m
2.DA.EzochiiteCu+(Rh3+Pt4+)S4Iso. m3m(4/m32/m) : Fd3m
2.DA.GrimmiteNiCo2S4Iso. m3m(4/m32/m) : Fd3m
2.DA.ZolenskyiteFeCr2S4Mon. 2/m : B2/m
2.DA.05ShiranuiiteCu+(Rh3+Rh4+)S4Iso. m3m(4/m32/m) : Fd3m
2.DA.05FletcheriteCuNi2S4Iso. m3m(4/m32/m) : Fd3m
2.DA.05Florensovite(Cu,Zn)Cr1.5Sb0.5S4Iso. m3m(4/m32/m)
2.DA.05SiegeniteCoNi2S4Iso. m3m(4/m32/m) : Fd3m
2.DA.05CadmoinditeCdIn2S4Iso. m3m(4/m32/m) : Fd3m
2.DA.05KalininiteZnCr2S4Iso. m3m(4/m32/m) : Fd3m
2.DA.05ViolariteFe2+Ni3+2S4Iso. m3m(4/m32/m) : Fd3m
2.DA.05NickeltyrrelliteCuNi2Se4Iso. m3m(4/m32/m) : Fd3m
2.DA.05LinnaeiteCo2+Co3+2S4Iso. m3m(4/m32/m) : Fd3m
2.DA.05CarrolliteCuCo2S4Iso. m3m(4/m32/m) : Fd3m
2.DA.05Cuproiridsite(Cu,Fe)Ir2S4Iso. m3m(4/m32/m) : Fd3m
2.DA.05Cuprorhodsite(Cu+0.5Fe3+0.5)Rh3+2S4Iso. m3m(4/m32/m) : Fd3m
2.DA.05BerndlehmanniteCu(CrV)S4Iso. m3m(4/m32/m) : Fd3m
2.DA.05PolydymiteNi2+Ni3+2S4Iso. m3m(4/m32/m) : Fd3m
2.DA.05TrüstedtiteNi3Se4Iso.
2.DA.05DaubréeliteFe2+Cr3+2S4Iso. m3m(4/m32/m) : Fd3m
2.DA.05CuprokalininiteCu(Cr3+Cr4+)S4Iso. m3m(4/m32/m) : Fd3m
2.DA.05GreigiteFe2+Fe3+2S4Iso. m3m(4/m32/m) : Fd3m
2.DA.05JoegoldsteiniteMnCr2S4Iso. m3m(4/m32/m) : Fd3m
2.DA.05BornhardtiteCo2+Co3+2Se4Iso. m3m(4/m32/m) : Fd3m
2.DA.05TyrrelliteCu(Co,Ni)2Se4Iso. m3m(4/m32/m) : Fd3m
2.DA.05InditeFeIn2S4Iso. m3m(4/m32/m) : Fd3m
2.DA.05XingzhongitePb2+Ir3+2S4Iso.
2.DA.05MalaniteCu+(Ir3+Pt4+)S4Iso. m3m(4/m32/m)
2.DA.10RhodostanniteCu+(Fe2+0.5Sn4+1.5)S4Tet. 4/m : I41/a
2.DA.10ToyohaiteAg+(Fe2+0.5Sn4+1.5)S4Tet. 4/m : I41/a
2.DA.15BrezinaiteCr3S4Mon. 2/m
2.DA.15Heideite(Fe,Cr)1.15(Ti,Fe)2S4Mon. 2/m
2.DA.20KonderiteCu3Pb(Rh,Pt,Ir)8S16Hex. 6/m : P6/m
2.DA.20InaglyiteCu3Pb(Ir,Pt)8S16Hex.
2.DA.25KingstoniteRh3S4Mon. 2/m : B2/m

Other InformationHide

Notes:
The mineral is slightly magnetic
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 FerrodimolybdeniteHide

References for FerrodimolybdeniteHide

Localities for FerrodimolybdeniteHide

Showing 1 localities.

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.
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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.
Jordan (TL)
 
  • Amman Governorate
    • Transjordan Plateau
      • Daba-Siwaqa complex
Galuskin et al. (2024) +1 other reference
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