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Majindeite

A valid IMA mineral species
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04146160017762595007219.jpg
Majindeite, etc.

Allende meteorite, Pueblito de Allende, Chihuahua, Mexico
04146160017762595007219.jpg
Majindeite, etc.

Allende meteorite, Pueblito de Allende, Chihuahua, Mexico
04146160017762595007219.jpg
Majindeite, etc.

Allende meteorite, Pueblito de Allende, Chihuahua, Mexico
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About MajindeiteHide

Formula:
Mg2Mo3O8
Specific Gravity:
5.54 (Calculated)
Crystal System:
Hexagonal
Name:
Named in honor of Ma Jinde (1939-1991) a mineralogist at the China University of Geosciences, Wuhan, China.
Mg analogue of kamiokite. The associated phases include Ni-Fe and Ru-Os-Ir alloys.

Majindeite likely results from subsolidus oxidation of Mo-rich precursor phase(s), possibly directly from kamiokite. Oxygen and magnesium (and Ca) were derived externally via cracks etc. within spinel. Majindeite formation is associated with an oxidation event synchronic with or taking place after the formation of grossular-bearing veins cutting melilite.


Unique IdentifiersHide

Mindat ID:
43599
Long-form identifier:
mindat:1:1:43599:2

IMA Classification of MajindeiteHide

Classification of MajindeiteHide

Strunz-mindat (2026):
4.CB.40

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
Dana 8th ed.:
7.6.3.3

7 : MULTIPLE OXIDES
6 : (AB)5X8

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

Physical Properties of MajindeiteHide

Density:
5.54 g/cm3 (Calculated)

Chemistry of MajindeiteHide

Mindat Formula:
Mg2Mo3O8
Element Weights:
Element% weight
Mo61.978 %
O27.556 %
Mg10.465 %

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