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QZ [2 records]

Record 1 2012-01-10

English

Subject field(s)
  • Military Occupational Codes - Non-commissionned Members
Universal entry(ies)
QZ
occupation code
OBS

QZ: trade specialty qualification code.

French

Domaine(s)
  • Groupes professionnels militaires pour les militaires du rang
Entrée(s) universelle(s)
QZ
occupation code
OBS

QZ : code de qualification de spécialiste (métiers).

Spanish

Save record 1

Record 2 2011-03-22

English

Subject field(s)
  • Chemical Elements and Compounds
  • Mineralogy
Universal entry(ies)
Q
symbol
SiO2
formula, see observation
O2Si
formula, see observation
14808-60-7
CAS number
OBS

One of the allotropic forms of crystalline silica, the other forms being cristobalite, tripoli and tridymite.

OBS

qtz: ... abbreviation ... used in drilling reports.

OBS

Chemical formulas: O2Si or SiO2

French

Domaine(s)
  • Éléments et composés chimiques
  • Minéralogie
Entrée(s) universelle(s)
Q
symbol
SiO2
formula, see observation
O2Si
formula, see observation
14808-60-7
CAS number
DEF

Une des variétés allotropiques de la silice cristallisée.

CONT

La silice ou dioxyde de silicium (formule moléculaire : SiO2) peut exister sous forme de silice cristalline ou de silice amorphe. La silice cristalline, peut se présenter sous plusieurs formes (polymorphes : même formule chimique mais structure cristalline différente). Le quartz (CAS : 14808-60-7) [...] La cristobalite (CAS : 14464-46-1) [...] Le tripoli (CAS : 1317-95-9) [et la] tridymite (CAS : 15468-32-3) [...]

OBS

Formules chimiques : O2Si ou SiO2

Spanish

Campo(s) temático(s)
  • Elementos y compuestos químicos
  • Mineralogía
Entrada(s) universal(es)
Q
symbol
SiO2
formula, see observation
O2Si
formula, see observation
14808-60-7
CAS number
CONT

El cuarzo es un mineral muy duro (grado 7 en la escala de Mohs) y hasta puede rayar el acero. Es muy abundante, pues entra en la composición de muchas rocas, especialmente en las de granito.

OBS

Sílice SiO2 cuyas numerosas variedades cristalizan en el sistema hexagonal.

OBS

Fórmulas químicas: O2Si o SiO2

Save record 2

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