NIOBIUM(IV) OXIDE - (12034-59-2)

introduction

prénom: niobium(IV) oxide
* IUPAC
Numero CAS: 12034-59-2
Formule chimique: NbO2
Masse molaire: 124.90518 g
Pourcentage de masse: Nb 74.381 %; O 25.618 % 

Classification

Bonding

Bonding: ionic
Ionic Character: 55.76 %

Thermochimie

ΔHf° (s): -190.3 kcal/mol 1 = -796.22 kJ/mol
ΔHf° (g): -51.3 kcal/mol 1 = -214.64 kJ/mol
S° (s): 13.03 cal/(mol•K) 2 = 54.52 J/(mol•K)
S° (g): 61.0 cal/(mol•K) 2 = 255.22 J/(mol•K)
ΔGf° (s): -177.0 kcal/mol 3 = -740.57 kJ/mol
ΔGf° (g): -52.3 kcal/mol 3 = -218.82 kJ/mol

Pour plus d'informations

Sources

(1) - Dean, John A. Lange's Handbook of Chemistry, 12th ed.; McGraw-Hill Book Company: New York, NY, 1979; p 9:4-9:94.
(2) - Dean, John A. Lange's Handbook of Chemistry, 12th ed.; McGraw-Hill Book Company: New York, NY, 1979; p 9:4-9:94.
(3) - Dean, John A. Lange's Handbook of Chemistry, 12th ed.; McGraw-Hill Book Company: New York, NY, 1979; p 9:4-9:94.