[no1]

uranium (IV, V) oxide
• Formula as commonly written: U4O9
• Hill system formula: O9U4
• CAS registry number: [12037-15-9]
• Formula weight: 1096.11
• Class: oxide
Synonyms
• uranium (IV, V) oxide
• uranium oxide
• tetrauranium nonaoxide
Physical properties
• Colour: black
• Appearance: crystalline solid
• Melting point:
• Boiling point:
• Density: 11200 kg m-3
Element analysis and oxidation numbers
For each compound, and where possible, a formal oxidation number for each element is given, but the usefulness of this number is limited, especially so for p-block elements in particular. Based upon that oxidation number, an electronic configuration is also given but note that for more exotic compounds you should view this as a guide only.
Element % Formal oxidation state Formal electronic configuration
O 13.14 -2 [He].2s2.2p6
U 86.86
Synthesis
Not available
Isotope pattern
What follows is the calculated isotope pattern for the U4O9 unit with the most intense ion set to 100%.
Formula: U4O9
mass %
1090 0.0
1091 0.0
1092 0.0
1093 2.9
1094 0.0
1095 0.0
1096 100.0
1097 0.4
1098 1.8
1099 0.0
1100 0.0