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MG MINERAL [4 records]

Record 1 2011-08-02

English

Subject field(s)
  • Mineralogy
Universal entry(ies)
(MgFe)Ti2O5
formula, see observation
DEF

A lunar mineral which consists of iron, magnesium, titanium, and oxygen.

CONT

Armalcolite is a new mineral... The structure is similar to terrestrial pseudobrookite... but the absence of trivalent iron and the Mg content justify a new mineral name.... Armalcolite was first observed as an early crystallizing phase in Apollo 11 high-Ti mare basalts and later in similar Apollo 17 mare basalts.

OBS

Chemical formula: (MgFe)Ti2O5

French

Domaine(s)
  • Minéralogie
Entrée(s) universelle(s)
(MgFe)Ti2O5
formula, see observation
DEF

Minéral lunaire analogue à la pseudobrookite terrestre et ramené par la navette spatiale Apollo 11.

OBS

Formule chimique : (MgFe)Ti2O5

Spanish

Campo(s) temático(s)
  • Mineralogía
Entrada(s) universal(es)
(MgFe)Ti2O5
formula, see observation
OBS

Fórmula química: (MgFe)Ti2O5

Save record 1

Record 2 2011-05-16

English

Subject field(s)
  • Mineralogy
DEF

A clay mineral of the montmorillonite group in which Si4+ has been replaced by Al3+ and in which there is virtual absence of Mg or Fe replacing Al.

OBS

beidellite: ... Found in Beidell, Colorado ...

French

Domaine(s)
  • Minéralogie
DEF

Silicate du groupe de la montmorillonite.

CONT

Le groupe des argiles comprend tout d'abord les montmorillonites dioctaédriques où Al est partiellement substitué dans la couche octaédrique [...] puis les beidellites qui ont, en plus, Si substitué dans la couche tétraédrique [...]

CONT

[...] les minéraux de néoformation appartiennent surtout aux phyllosilicates à deux feuillets liés par des bases (smectites, beidellite, montmorillonite).

OBS

La beidellite fut décrite pour la première fois en 1925 dans la mine Beidelle - Colorado - USA.

Spanish

Campo(s) temático(s)
  • Mineralogía
DEF

Silicato de aluminio hidratado perteneciente al grupo de las arcillas.

Save record 2

Record 3 2005-03-08

English

Subject field(s)
  • Petrography
DEF

A limestone in which the mineral dolomite is conspicuous, but calcite is more abundant; specif. a limestone containing 10-50% dolomite and 50-90% calcite and having an approximate magnesium-carbonate equivalent of 4. 4-22. 7%..., or a limestone whose Ca/Mg ratio ranges from 4. 74 to 60...

French

Domaine(s)
  • Pétrographie
CONT

Le Dévonien supérieur se compose de carbonates [...] au-dessus desquels on trouve les calcaires dolomitiques [...]

Spanish

Save record 3

Record 4 1997-01-27

English

Subject field(s)
  • Mineralogy
DEF

A mineral. It is an aluminosilicate of Ca, Fe and Mg.

French

Domaine(s)
  • Minéralogie
DEF

[...] mélange de silicates sous forme de tétraèdres pyramidés, pseudomorphose de l'helvine.

DEF

Espèce mal définie qui est peut-être une pseudomorphose de grenat ou d'helvine.

Spanish

Save record 4

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