[no1]

uranium (IV) chloride
• Formula as commonly written: UCl4
• Hill system formula: Cl4U1
• CAS registry number: [10026-10-5]
• Formula weight: 379.84
• Class: chloride
Synonyms
• uranium (IV) chloride
• uranium chloride
• uranium tetrachloride
Physical properties
• Colour: green
• Appearance: crystalline solid
• Melting point: 590°C
• Boiling point: 791°C
• Density: 4720 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
Cl 37.33 -1 [Ne].3s2.3p6
U 62.67 4 [Rn].5f2
Synthesis
Not available
Solid state structure
• Geometry of uranium: 8 coordinate: dodecahedral
• Prototypical structure:



Isotope pattern
What follows is the calculated isotope pattern for the UCl4 unit with the most intense ion set to 100%.
Formula: U1Cl4
mass %
374 0.0
375 0.6
376 0.0
377 0.7
378 78.2
379 0.4
380 100.0
381 0.1
382 48.0
383 0.0
384 10.2
385 0.0
386 0.8

[no1]

uranium (IV) fluoride
• Formula as commonly written: UF4
• Hill system formula: F4U1
• CAS registry number: [10049-14-6]
• Formula weight: 314.023
• Class: fluoride
Synonyms
• uranium (IV) fluoride
• uranium fluoride
• uranium tetrafluoride
Physical properties
• Colour: green
• Appearance: crystalline solid
• Melting point: 960°C; 1036°C
• Boiling point: 1417°C
• Density: 6700 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
F 24.20 -1 [He].2s2.2p6
U 75.80 4 [Rn].5f2
Synthesis
Not available
Solid state structure
• Geometry of uranium: 8 coordinate: square antiprismatic
• Prototypical structure:



Isotope pattern
What follows is the calculated isotope pattern for the UF4 unit with the most intense ion set to 100%.
Formula: U1F4
mass %
310 0.0
311 0.7
312 0.0
313 0.0
314 100.0

[no1]

uranium (IV) iodide
• Formula as commonly written: UI4
• Hill system formula: I4U1
• CAS registry number: [13470-22-9]
• Formula weight: 745.647
• Class: iodide
Synonyms
• uranium (IV) iodide
• uranium iodide
• uranium tetraiodide
Physical properties
• Colour: black
• Appearance: crystalline solid
• Melting point: 506°C (under I2 atmosphere)
• Boiling point: 757
• Density: 5.6 (15°C)
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
I 68.08 -1 [Kr].4d10.5s2.5p6
U 31.92 4 [Rn].5f2
Synthesis
Not available
Solid state structure
• Geometry of uranium: 6-coordinate: octahedral layered
• Prototypical structure:



Isotope pattern
What follows is the calculated isotope pattern for the UI4 unit with the most intense ion set to 100%.
Formula: U1I4
mass %
742 0.0
743 0.7
744 0.0
745 0.0
746 100.0

[no1]

uranium (IV) oxide
• Formula as commonly written: UO2
• Hill system formula: O2U1
• CAS registry number: [1344-57-6]
• Formula weight: 270.028
• Class: oxide
Synonyms
• uranium (IV) oxide
• uranium dioxide
• uranium oxide
• pitchblende
Physical properties
• Colour: dark brown
• Appearance: crystalline solid
• Melting point: 2827°C
• Boiling point:
• Density: 10970 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 11.85 -2 [He].2s2.2p6
U 88.15 4 [Rn].5f2
Synthesis
Not available
Solid state structure
• Geometry of uranium:
• Prototypical structure:



Isotope pattern
What follows is the calculated isotope pattern for the UO2 unit with the most intense ion set to 100%.
Formula: U1O2
mass %
266 0.0
267 0.7
268 0.0
269 0.0
270 100.0
271 0.1
272 0.4

[no1]

uranium (IV) telluride
• Formula as commonly written: UTe2
• Hill system formula: Te2U1
• CAS registry number: [12138-37-3]
• Formula weight: 493.229
• Class: telluride
Synonyms
• uranium (IV) telluride
• uranium ditelluride
• uranium telluride
Physical properties
• Colour: dark grey or black
• Appearance: crystalline solid
• Melting point: 1180°C
• 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
Te 51.74 -2 [Kr].4d10.5s2.5p6
U 48.26 4 [Rn].5f2
Synthesis
Alpha and beta forms exist
Solid state structure
• Geometry of uranium:
• Prototypical structure:



Isotope pattern
What follows is the calculated isotope pattern for the UTe2 unit with the most intense ion set to 100%.
Formula: U1Te2
mass %
480 0.0
481 0.0
482 0.4
483 0.3
484 1.3
485 2.2
486 6.3
487 4.8
488 17.9
489 14.9
490 36.9
491 23.2
492 66.8
493 21.8
494 100.0
495 0.4
496 93.7
497 0.0
498 50.0

[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

[no1]

uranium (V) bromide
• Formula as commonly written: UBr5
• Hill system formula: Br5U1
• CAS registry number: [13775-16-1]
• Formula weight: 637.549
• Class: bromide
Synonyms
• uranium (V) bromide
• uranium bromide
• uranium pentabromide
Physical properties
• Colour: brown or reddish brown
• Appearance: crystalline solid
• Melting point:
• 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
Br 62.66 -1 [Ar].3d10.4s2.4p6
U 37.34 5 [Rn].5f1
Synthesis
Not available
Solid state structure
• Geometry of uranium: 6 coordinate: octahedral
• Prototypical structure:



Isotope pattern
What follows is the calculated isotope pattern for the UBr5 unit with the most intense ion set to 100%.
Formula: U1Br5
mass %
629 0.0
630 0.1
631 0.0
632 0.4
633 10.6
634 0.7
635 51.4
636 0.7
637 100.0
638 0.3
639 97.3
640 0.1
641 47.3
642 0.0
643 9.2

[no1]

uranium (V) chloride
• Formula as commonly written: UCl5
• Hill system formula: Cl5U1
• CAS registry number: [13470-21-8]
• Formula weight: 415.292
• Class: chloride
Synonyms
• uranium (V) chloride
• uranium chloride
• uranium pentachloride
Physical properties
• Colour: brown
• Appearance: crystalline solid
• Melting point: 287°C
• Boiling point: 527
• 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
Cl 42.68 -1 [Ne].3s2.3p6
U 57.32 5 [Rn].5f1
Synthesis
Not available
Isotope pattern
What follows is the calculated isotope pattern for the UCl5 unit with the most intense ion set to 100%.
Formula: U1Cl5
mass %
409 0.0
410 0.5
411 0.0
412 0.7
413 62.5
414 0.5
415 100.0
416 0.1
417 64.0
418 0.0
419 20.4
420 0.0
421 3.3
422 0.0
423 0.2

[no1]

uranium (V) fluoride
• Formula as commonly written: UF5
• Hill system formula: F5U1
• CAS registry number: [13775-07-0]
• Formula weight: 333.021
• Class: fluoride
Synonyms
• uranium (V) fluoride
• uranium fluoride
• uranium pentafluoride
Physical properties
• Colour: very pale blue or pale grey
• Appearance: crystalline solid
• Melting point: 348°C
• Boiling point:
• Density: 5810 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
F 28.52 -1 [He].2s2.2p6
U 71.48 5 [Rn].5f1
Synthesis
Not available
Solid state structure
• Geometry of uranium: 6 coordinate: octahedral
• Prototypical structure:




Isotope pattern
What follows is the calculated isotope pattern for the UF5 unit with the most intense ion set to 100%.
Formula: U1F5
mass %
329 0.0
330 0.7
331 0.0
332 0.0
333 100.0

[no1]

uranium (V) oxide
• Formula as commonly written: U2O5
• Hill system formula: O5U2
• CAS registry number: [12065-66-6]
• Formula weight: 556.055
• Class: oxide
Synonyms
• uranium (V) oxide
• uranium oxide
• diuranium pentoxide
Physical properties
• Colour: black
• Appearance:
• Melting point:
• 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
O 14.39 -2 [He].2s2.2p6
U 85.61 5 [Rn].5f1
Synthesis
Not available
Isotope pattern
What follows is the calculated isotope pattern for the U2O5 unit with the most intense ion set to 100%.
Formula: U2O5
mass %
550 0.0
551 0.0
552 0.0
553 1.5
554 0.0
555 0.0
556 100.0
557 0.2
558 1.0
559 0.0
560 0.0