[no1]

uranium (VI) selenide
• Formula as commonly written: USe3
• Hill system formula: Se3U1
• CAS registry number: [12138-23-7]
• Formula weight: 474.909
• Class: selenide
Synonyms
• uranium (VI) selenide
• uranium selenide
• uranium triselenide
Physical properties
• Colour: black
• Appearance: crystalline solid
• Melting point: 1160°C (decomposes)
• Boiling point:
• Density:
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
Se 49.88 -2 [Ar].3d10.4s2.4p6
U 50.12 6 [Rn]
Synthesis
Not available
Solid state structure
• Geometry of uranium:
• Prototypical structure:



Isotope pattern
What follows is the calculated isotope pattern for the USe3 unit with the most intense ion set to 100%.
Formula: U1Se3
mass %
462 0.0
463 0.0
464 0.1
465 0.0
466 0.9
467 0.3
468 4.5
469 0.8
470 15.8
471 2.1
472 40.3
473 3.4
474 76.2
475 3.7
476 100.0
477 1.2
478 88.2
479 0.1
480 34.5
481 0.0
482 5.9
483 0.0
484 0.4