Magnéliite
A valid IMA mineral species
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Arne Magnéli
Formula:
Ti3+2Ti4+2O7
Specific Gravity:
4.30 (Calculated)
Crystal System:
Triclinic
Name:
Name in honor of Arne Magnéli (6 December 1914, Stockholm, Sweden - 22 July 1996, Stockholm, Sweden), chemist known especially for his studies of nonstoichiometric phenomenon, transition metal oxides and alloys and their homologous series. The famous Magnéli phases, named after him, are substoichiometric oxides of titanium.
Type Locality:
Second natural mixed-valency Ti oxide (with both the oxidation states as mandatory ones) after kaitianite. Most likely identical to UM1978-08-O:AlCaCrFeMgTi.
New Ti-oxide mineral that corresponds to the first member of the homologous series of Ti-oxides (with TinO2n−1), known also as Magnéli phases.
Known synthetic analogue.
New Ti-oxide mineral that corresponds to the first member of the homologous series of Ti-oxides (with TinO2n−1), known also as Magnéli phases.
Known synthetic analogue.
Unique Identifiers
Mindat ID:
55973
Long-form identifier:
mindat:1:1:55973:3
GUID
(UUID V4):
(UUID V4):
71304e7d-a9d1-450b-b554-03d2e9e05a9e
IMA Classification of Magnéliite
Approved
Classification of Magnéliite
4.BB.
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
B : Metal: Oxygen = 3:4 and similar
B : With only medium-sized cations
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
B : Metal: Oxygen = 3:4 and similar
B : With only medium-sized cations
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 |
|---|---|---|
| Mnli | 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 Magnéliite
Transparency:
Transparent
Density:
4.30 g/cm3 (Calculated)
Chemistry of Magnéliite
Mindat Formula:
Ti3+2Ti4+2O7
Elements listed:
Crystallography of Magnéliite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 5.60(1) Å, b = 7.13(1) Å, c = 12.47(1) Å
α = 95.1(1)°, β = 95.2(1)°, γ = 108.7(1)°
α = 95.1(1)°, β = 95.2(1)°, γ = 108.7(1)°
Ratio:
a:b:c = 0.785 : 1 : 1.749
Unit Cell V:
465.99 ų (Calculated from Unit Cell)
Z:
4
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.277 Å | (73) |
| 3.020 Å | (74) |
| 2.818 Å | (100) |
| 2.800 Å | (49) |
| 2.523 Å | (57) |
| 1.721 Å | (49) |
| 1.718 Å | (50) |
| 1.666 Å | (51) |
Type Occurrence of Magnéliite
General Appearance of Type Material:
subhedral crystals ~4 μm in size.
Place of Conservation of Type Material:
Mineralogical collections of the Dipartimento di Scienze della Terra “A. Desio”, Università di Milano, Via Mangiagalli 34, 20133 Milan, Italy, registration number MCMGPG-H2021-001.
Associated Minerals at Type Locality:
Synonyms of Magnéliite
Related Minerals - Strunz-mindat Grouping
| 4.BB. | Elgoresyite | (Mg5Si2)O9 |
| 4.BB. | Chenmingite | FeCr2O4 |
| 4.BB. | Dellagiustaite | V2+Al2O4 |
| 4.BB. | Thermaerogenite | CuAl2O4 |
| 4.BB. | Chukochenite | LiAl5O8 |
| 4.BB. | Garpenbergite | Mn6◻AsSbO10(OH)2 |
| 4.BB. | Jianmuite | ZrTi4+Ti3+5Al3O16 |
| 4.BB.05 | Chromite | Fe2+Cr3+2O4 |
| 4.BB.05 | Cochromite | CoCr2O4 |
| 4.BB.05 | Coulsonite | Fe2+V3+2O4 |
| 4.BB.05 | Cuprospinel | Cu2+Fe3+2O4 |
| 4.BB.05 | Filipstadite | (Fe3+0.5Sb5+0.5)Mn2O4 |
| 4.BB.05 | Franklinite | Zn2+Fe3+2O4 |
| 4.BB.05 | Gahnite | ZnAl2O4 |
| 4.BB.05 | Galaxite | Mn2+Al2O4 |
| 4.BB.05 | Hercynite | Fe2+Al2O4 |
| 4.BB.05 | Jacobsite | Mn2+Fe3+2O4 |
| 4.BB.05 | Manganochromite | Mn2+Cr2O4 |
| 4.BB.05 | Magnesiocoulsonite | MgV2O4 |
| 4.BB.05 | Magnesiochromite | MgCr2O4 |
| 4.BB.05 | Magnesioferrite | MgFe3+2O4 |
| 4.BB.05 | Magnetite | Fe2+Fe3+2O4 |
| 4.BB.05 | Nichromite | (Ni,Co,Fe)(Cr,Fe,Al)2O4 |
| 4.BB.05 | Qandilite | (Mg,Fe3+)2(Ti,Fe3+,Al)O4 |
| 4.BB.05 | Spinel | MgAl2O4 |
| 4.BB.05 | Trevorite | Ni2+Fe3+2O4 |
| 4.BB.05 | Ulvöspinel | TiFe2+2O4 |
| 4.BB.05 | Vuorelainenite | Mn2+V3+2O4 |
| 4.BB.05 | Zincochromite | ZnCr2O4 |
| 4.BB.05 | Harmunite | CaFe2O4 |
| 4.BB.05 | Wernerkrauseite | Ca(Fe3+,Mn3+)2Mn4+O6 |
| 4.BB.05 | Deltalumite | (Al0.67◻0.33)Al2O4 |
| 4.BB.05 | Guite | Co2+Co3+2O4 |
| 4.BB.10 | Hausmannite | Mn2+Mn3+2O4 |
| 4.BB.10 | Hetaerolite | ZnMn2O4 |
| 4.BB.10 | Manganostibite | (Mn,Fe)7SbAsO12 |
| 4.BB.15 | Maghemite | (Fe3+0.67◻0.33)Fe3+2O4 |
| 4.BB.15 | Titanomaghemite | (Ti4+0.5◻0.5)Fe3+2O4 |
| 4.BB.20 | Tegengrenite | (Mn3+0.5Sb5+0.5)Mg2O4 |
| 4.BB.25 | Xieite | Fe2+Cr2O4 |
| 4.BB.30 | Carmeltazite | ZrAl2Ti4O11 |
| 4.BB.35 | Feiite | Fe2+2(Fe2+Ti4+)O5 |
| 4.BB.40 | Maohokite | MgFe2O4 |
| 4.BB.45 | Tschaunerite | (Fe2+)(Fe2+Ti4+)O4 |
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 Magnéliite
mindat.org URL:
https://www.mindat.org/min-55973.html
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External Links:
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References for Magnéliite
Reference List:
Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2022) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 66. European Journal of Mineralogy, 34 (2) 253-257 doi:10.5194/ejm-34-253-2022
Localities for Magnéliite
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.
Israel (TL) | |
| Miyawaki et al. (2022) |
