Melanostibite
A valid IMA mineral species - grandfathered
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About Melanostibite
Formula:
Mn2+2Fe3+Sb5+O6
Colour:
Black, reddish-black
Hardness:
4
Specific Gravity:
5.24
Crystal System:
Trigonal
Name:
Named melanostibian by L.J. Igelström in 1893, for the Greek words describing its color (melano = black) and its composition (stibium = antimony). Renamed by P.B. Moore in 1967 to melanostibite along with the now discredited lamprostibian.
Type Locality:
Melanostibite is an homeotypic derivative of pyrophanite.
Chemically similar to manganoschafarzikite. Also compare manganostibite, filipstadite, tegengrenite, and garpenbergite.
Chemically similar to manganoschafarzikite. Also compare manganostibite, filipstadite, tegengrenite, and garpenbergite.
Unique Identifiers
Mindat ID:
2631
Long-form identifier:
mindat:1:1:2631:0
IMA Classification of Melanostibite
Approved, 'Grandfathered' (first described prior to 1959)
First published:
1893
Classification of Melanostibite
4.CB.05
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
C : Metal: Oxygen = 2: 3,3: 5, and similar
B : With medium-sized cations
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
C : Metal: Oxygen = 2: 3,3: 5, and similar
B : With medium-sized cations
4.3.5.5
4 : SIMPLE OXIDES
3 : A2X3
4 : SIMPLE OXIDES
3 : A2X3
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 for Standard |
|---|---|---|
| Mlsb | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Pronunciation of Melanostibite
Pronunciation:
| Play | Recorded by | Country |
|---|---|---|
| Jolyon Ralph | United Kingdom |
Physical Properties of Melanostibite
Transparency:
Opaque
Comment:
Brilliant
Colour:
Black, reddish-black
Streak:
Pale red to cherry red
Hardness:
4 on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
{0001}
{0001}
Density:
5.24 g/cm3 (Measured) 5.63 g/cm3 (Calculated)
Comment:
Measured density was on porous fragments
Optical Data of Melanostibite
Type:
Uniaxial
Chemistry of Melanostibite
Mindat Formula:
Mn2+2Fe3+Sb5+O6
Element Weights:
Elements listed:
Crystallography of Melanostibite
Crystal System:
Trigonal
Class (H-M):
3 - Pyramidal
Space Group:
R3
Cell Parameters:
a = 5.2351(3) Å, c = 14.3645(8) Å
Ratio:
a:c = 1 : 2.744
Unit Cell V:
340.93 ų (Calculated from Unit Cell)
Z:
3
Morphology:
pseudohexagonal tabular crystals
Twinning:
Common. Rotation about [0001].
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0000178 | Melanostibite | Moore P B (1968) Substitutions of the type (Sb0.5Fe0.5)-(Ti): The crystal structure of melanostibite American Mineralogist 53 1104-1109 |  | 1968 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 1.766 Å | (80) |
| 1.915 Å | (50) |
| 2.613 Å | (80) |
| 2.806 Å | (100) |
| 3.819 Å | (60) |
| 4.313 Å | (40) |
| 4.775 Å | (50) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-? alteration and/or metamorphism | |
| 33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) |
Type Occurrence of Melanostibite
General Appearance of Type Material:
thin mm-sized black platelets
Place of Conservation of Type Material:
Swedish Museum of Natural History, Stockholm, Sweden.
The Natural History Museum, London, England, 83307.
National Museum of Natural History, Washington, D.C., USA, R5766.
The Natural History Museum, London, England, 83307.
National Museum of Natural History, Washington, D.C., USA, R5766.
Geological Setting of Type Material:
Fe–Mn orebody in manganoan dolomite.
Associated Minerals at Type Locality:
Synonyms of Melanostibite
Other Language Names for Melanostibite
Common Associates
Related Minerals - Strunz-mindat Grouping
| 4.CB. | Magnesiohögbomite-6N12S | Mg5Al11TiO23(OH) |
| 4.CB. | Kidodite | BaMg2Fe16O27 |
| 4.CB. | Ferrohögbomite-2N2S | [(Fe2+,Mg,Zn,Al)3(Al,Ti,Fe3+)8O15(OH)]2 |
| 4.CB. | Zhenruite | (MoO3)2 · H2O |
| 4.CB. | Fuyuanite | Mg7Nb6O18(OH)8 |
| 4.CB. | Virgilluethite | MoO3 · H2O |
| 4.CB. | Pengite | (Pb8Sb3+3)Σ11Sb5+9O35 |
| 4.CB.05 | Brizziite | NaSb5+O3 |
| 4.CB.05 | Tistarite | Ti3+2O3 |
| 4.CB.05 | Hematite | Fe2O3 |
| 4.CB.05 | Ecandrewsite | ZnTiO3 |
| 4.CB.05 | 'UM1998-11-O-AuHSb' | Au+2Sb3+O2(OH) |
| 4.CB.05 | Karelianite | V3+2O3 |
| 4.CB.05 | Corundum | Al2O3 |
| 4.CB.05 | Eskolaite | Cr2O3 |
| 4.CB.05 | Geikielite | MgTiO3 |
| 4.CB.05 | Akimotoite | MgSiO3 |
| 4.CB.05 | 'Unnamed (Fe-Cr Oxide)' | FeCrO3 |
| 4.CB.05 | 'Auroantimonate' | AuSbO3 |
| 4.CB.05 | Hemleyite | Fe2+SiO3 |
| 4.CB.05 | Ilmenite | Fe2+TiO3 |
| 4.CB.05 | Pyrophanite | Mn2+TiO3 |
| 4.CB.10 | Bixbyite-(Fe) | (Fe,Mn)2O3 |
| 4.CB.10 | Bixbyite-(Mn) | Mn3+2O3 |
| 4.CB.10 | Avicennite | Tl3+2O3 |
| 4.CB.15 | Armalcolite | MgTi4+2O5 |
| 4.CB.15 | Ferropseudobrookite | Fe2+Ti4+2O5 |
| 4.CB.15 | Griffinite | Al2Ti4+O5 |
| 4.CB.15 | Pseudobrookite Group | |
| 4.CB.15 | Sassite | Ti3+2Ti4+O5 |
| 4.CB.15 | Pseudobrookite | Fe3+2Ti4+O5 |
| 4.CB.20 | Zincovelesite-6N6S | Zn3(Fe3+,Mn3+,Al,Ti)8O15(OH) |
| 4.CB.20 | Magnesiohögbomite-2N4S | (Mg8.43Fe2+1.57)Σ=10Al22Ti4+2O46(OH)2 |
| 4.CB.20 | Magnesiobeltrandoite-2N3S | (Mg6Al2)(Al18Fe3+2)O38(OH)2 |
| 4.CB.20 | Zincohögbomite-2N6S | [(Zn,Mg)7(Al,Fe3+,Ti)16O31(OH)]2 |
| 4.CB.20 | Magnesiohögbomite-6N6S | [(Mg,Fe2+)3(Al,Ti,Fe3+)8O15(OH)]6 |
| 4.CB.20 | Magnesiohögbomite-2N3S | [(Mg,Fe2+,Zn)4(Al,Ti,Fe3+)10O19(OH)]2 |
| 4.CB.20 | Magnesiohögbomite-2N2S | [(Mg,Fe2+)3[Al7(Ti,Fe3+)]O15(OH)]2 |
| 4.CB.20 | 'Ferrohögbomite-6N12S' | [(Fe2+,Mg,Zn)5(Al,Ti,Fe3+)12O23(OH)]6 |
| 4.CB.20 | Zincohögbomite-2N2S | [(Zn,Al,Fe2+)3(Al,Fe3+,Ti)8O15(OH)]2 |
| 4.CB.25 | Kleberite | FeTi6O11(OH)5 |
| 4.CB.25 | Pseudorutile | Fe3+2Ti4+3O9 |
| 4.CB.30 | Oxyvanite | V3+2V4+O5 |
| 4.CB.30 | Berdesinskiite | V3+2TiO5 |
| 4.CB.30 | Kaitianite | Ti3+2Ti4+O5 |
| 4.CB.35 | Machiite | Al2Ti3O9 |
| 4.CB.35 | Vestaite | (Ti4+Fe2+)Ti4+3O9 |
| 4.CB.35 | Olkhonskite | (Cr,V)2Ti3O9 |
| 4.CB.35 | Schreyerite | V3+2Ti4+3O9 |
| 4.CB.40 | Zincorinmanite-(Zn) | Zn2Sb2(Fe3+4Zn2)O14(OH)2 |
| 4.CB.40 | Majindeite | Mg2Mo3O8 |
| 4.CB.40 | Almagreraite | CuZnMn4+3O8 |
| 4.CB.40 | Kamiokite | Fe2Mo3O8 |
| 4.CB.40 | Nolanite | V3+8Fe3+2O14(OH)2 |
| 4.CB.40 | Iseite | Mn2Mo3O8 |
| 4.CB.40 | Rinmanite | Zn2Sb2Mg2Fe4O14(OH)2 |
| 4.CB.45 | Stibioclaudetite | AsSbO3 |
| 4.CB.45 | Claudetite | As2O3 |
| 4.CB.50 | Senarmontite | Sb2O3 |
| 4.CB.50 | Arsenolite | As2O3 |
| 4.CB.55 | Valentinite | Sb2O3 |
| 4.CB.60 | Bismite | Bi2O3 |
| 4.CB.65 | Sphaerobismoite | Bi2O3 |
| 4.CB.70 | Sillénite | Bi12SiO20 |
| 4.CB.75 | Kyzylkumite | V3+Ti2O5(OH) |
| 4.CB.80 | 'Tietaiyangite' | Fe3+4Fe2+TiO9 |
| 4.CB.85 | Liuite | FeTiO3 |
| 4.CB.90 | Luogufengite | Fe2O3 |
| 4.CB.95 | Wangdaodeite | FeTiO3 |
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 Melanostibite
mindat.org URL:
https://www.mindat.org/min-2631.html
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References for Melanostibite
Reference List:
Moore, Paul B. (1968) Substitutions of the type (Sb5+0.5Fe3+0.5)<->(Ti4+): The crystal structure of melanostibite. American Mineralogist, 53 (7-8) 1104-1109
Localities for Melanostibite
Showing 6 localities.
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.
France | |
| Erik Vercammen collection |
Italy | |
| Musetti et al. (2022) +1 other reference |
Madagascar | |
| Dekoninck et al. (2024) |
Romania | |
| HÎRTOPANU et al. (2025) |
Sweden (TL) | |
| Igelström (1893) +3 other references |
| Natural History Museum |
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Plan de Labasse, Nabias, Aure Valley, Hautes-Pyrénées, Occitanie, France