[no1]

Shown below is a partial list of radioactive minerals which can be found in nature.
Uraninite (combined UO2and UO3; 50-85 percent U308). Uraninite is a naturally occurring uranium oxide with cubic or octahedral crystal form. It has a specific gravity of 8-10.5 (iron = 7.85), a grayish-black color sometimes with a greenish cast and a hardness of 5-6, about the same as steel. Its streak3 is black. Its most widespread occurrence is in pegmatites , in which it is found in small amounts, throughout the world. However, it is also an important constituent of nearly all important primary deposits, occurring closely associated with its massive variety, pitchblende.

Davidite (rare earth-iron-titanium oxide; 7-10 percent U3O8). Davidite is a dark brown to black mineral with a glassy to submetallic luster. It has about the same hardness as pitchblende (5-6) and is somewhat lighter in weight (specific gravity, 4.5). It occurs most commonly in angular, irregular masses, sometimes with crystal outlines, but never in round, botryoidal shapes like pitchblende. When it is exposed to weathering, a thin yellow-green coating of carnotite or tyuyamunite may form on its surface.
A general term for a mixture of secondary uranium minerals like the ones listed below is Gummite.
Carnotite (K20*2UO3*V2O5*nH20; 50-55 percent U3O8). Carnotite, a potassium uranium vanadate, is the most important of the secondary uranium ore minerals. It is a lemon-yellow mineral with an earthy luster, a yellow streak, and a specific gravity of about 4. It occurs most commonly in soft; powdery aggregates of finely crystalline material or in thin films or stains on rocks or other minerals.
Tyuyamunite (CaO*2UO3 *V2O5*nH20; 48-55 percent U3O8).Tyuyamunite is closely related to carnotite as indicated by the chemical formula, which is the same except that calcium substitutes for the potassium of carnotite. The physical properties of tyuyamunite are the same except for a slightly more greenish color than carnotite and, in some cases, a very weak yellow-green fluorescence not found in carnotite.

Torbernite and Meta-torbernite (CuO*2UO3 *P2O5* nH20; 60 percent U3O8) . Torbernite and meta-torbernite are hydrous copper uranium phosphates, the only difference between the two being the number of water molecules present; their physical properties are identical. They have a bright emerald color, a pearly luster, hardness of 2-2 1/2 (about the same as the fingernail), and specific gravity of about 3.5 (a little heavier than quartz). They occur in flat, square, translucent crystals which usually fluoresce with a faint green color.

Autunite and Meta-autunite (CaO*2UO3* P2O5* nH2O; 60 percent U308. Reference to the chemical formula will show that these two minerals have the same composition as torbernite, with calcium substituting for copper. Because of this similarity, they are commonly found together, the proportion of torbernite being dependent upon the amount of copper available to the uranium-bearing solutions. In some instances, where copper is completely lacking, only autunite or meta-autunite is formed.
Uranophane (CaO*2UO3*2SiO2*6H2O; 65 percent U308 Uranophane is a hydrated calcium uranium silicate containing silica in place of the phosphate of autunite. It is slightly lighter in color and somewhat heavier than autunite (specific gravity 3.85) and has a different crystalline form; it may occur as stains or coatings without apparent crystal form or as finely flbrous or radiating crystal aggregates.

Schroeckingerite [NaCa3 (UO2) (CO3)3(SO4)F*1OH20; 30 percent U308]. Schroeckingerite is a complex hydrated sulfate, carbonate, and fluoride of calcium, sodium, and uranium. It has a yellow to greenish-yellow color with a pearly luster, a bright yellow-green fluorescence. It occurs as globular coatings on rock fracture surfaces or as small rounded masses composed of aggregates of flaky crystals distributed through soft rocks or soil.

There are a number other fairly radioactive minerals. Some of these minerals contain rare earths in addition to uranium and thorium. Rare earths minerals are those minerals which may contain cerium, dysprosium, erbium, europium, gadolinium, holmium, lanthanium, lutetium, neodymium, praseodymium, samarium, terbium, niobium, and thulium. Here is a partial list of other radioactive minerals:

[no1]

uranium (II) oxide
• Formula as commonly written: UO
• Hill system formula: O1U1
• CAS registry number: [12035-97-1]
• Formula weight: 254.028
• Class: oxide
Synonyms
• uranium (II) oxide
• uranium oxide
Physical properties
• Colour:
• 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 6.30 -2 [He].2s2.2p6
U 93.70 2 [Rn].5f4
Synthesis
Not available
Solid state structure
• Geometry of uranium:
• Prototypical structure:


Isotope pattern
What follows is the calculated isotope pattern for the UO unit with the most intense ion set to 100%.
Formula: U1O1
mass %
250 0.0
251 0.7
252 0.0
253 0.0
254 100.0
255 0.0
256 0.2

[no1]

uranium (II) sulphide
• Formula as commonly written: US
• Hill system formula: S1U1
• CAS registry number: [12039-11-1]
• Formula weight: 270.095
• Class: sulphide
Synonyms
• uranium (II) sulphide
• uranium sulphide
Physical properties
• Colour: silvery
• Appearance: crystalline solid
• Melting point: 246°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
S 11.87 -2 [Ne].3s2.3p6
U 88.13 2 [Rn].5f4
Synthesis
Not available
Solid state structure
• Geometry of uranium: 6 coordinate: octahedral
• Prototypical structure: NaCl (rock salt)



Isotope pattern
What follows is the calculated isotope pattern for the US unit with the most intense ion set to 100%.
Formula: U1S1
mass %
266 0.0
267 0.7
268 0.0
269 0.0
270 100.0
271 0.8
272 4.4
273 0.0
274 0.0

[no1]

uranium (III) bromide
• Formula as commonly written: UBr3
• Hill system formula: Br3U1
• CAS registry number: [13470-19-4]
• Formula weight: 477.741
• Class: bromide
Synonyms
• uranium (III) bromide
• uranium bromide
• uranium tribromide
Physical properties
• Colour: red
• Appearance: crystalline solid
• Melting point: 727°C
• Boiling point: 1537°C
• 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 50.18 -1 [Ar].3d10.4s2.4p6
U 49.82 3 [Rn].5f3
Synthesis
Not available
Solid state structure
• Geometry of uranium: 9 coordinate: tricapped trigonal prismatic
• Prototypical structure:



Isotope pattern
What follows is the calculated isotope pattern for the UBr3 unit with the most intense ion set to 100%.
Formula: U1Br3
mass %
471 0.0
472 0.2
473 0.0
474 0.7
475 34.3
476 0.7
477 100.0
478 0.2
479 97.3
480 0.0
481 31.5

[no1]

uranium (III) chloride
• Formula as commonly written: UCl3
• Hill system formula: Cl3U1
• CAS registry number: [10025-93-1]
• Formula weight: 344.387
• Class: chloride
Synonyms
• uranium (III) chloride
• uranium chloride
• uranium trichloride
Physical properties
• Colour: green
• Appearance: crystalline solid
• Melting point: 837°C
• Boiling point: 1657
• Density: 5500 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 30.88 -1 [Ne].3s2.3p6
U 69.12 3 [Rn].5f3
Synthesis
Not available
Solid state structure
• Geometry of uranium: 9 coordinate: tricapped trigonal prismatic
• Prototypical structure:



Isotope pattern
What follows is the calculated isotope pattern for the UCl3 unit with the most intense ion set to 100%.
Formula: U1Cl3
mass %
339 0.0
340 0.7
341 0.0
342 0.7
343 100.0
344 0.2
345 95.9
346 0.0
347 30.7
348 0.0
349 3.3

[no1]

uranium (III) fluoride
• Formula as commonly written: UF3
• Hill system formula: F3U1
• CAS registry number: [13775-06-9]
• Formula weight: 295.024
• Class: fluoride
Synonyms
• uranium (III) fluoride
• uranium fluoride
• uranium trifluoride
Physical properties
• Colour: black or purple-black
• Appearance: crystalline solid
• Melting point: 1140°C (decomposes)
• Boiling point:
• Density: 8900 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 19.32 -1 [He].2s2.2p6
U 80.68 3 [Rn].5f3
Synthesis
Not available
Solid state structure
• Geometry of uranium: 9 coordinate: tricapped trigonal prismatic
• Prototypical structure:



Isotope pattern
What follows is the calculated isotope pattern for the UF3 unit with the most intense ion set to 100%.
Formula: U1F3
mass %
291 0.0
292 0.7
293 0.0
294 0.0
295 100.0

[no1]

uranium (III) hydride
• Formula as commonly written: UH3
• Hill system formula: H3U1
• CAS registry number: [13598-56-6]
• Formula weight: 241.053
• Class: hydride
Synonyms
• uranium (III) hydride
• uranium hydride
• uranium trihydride
Physical properties
• Colour: grey-black or black
• Appearance: crystalline solid
• Melting point:
• Boiling point:
• Density: 11100 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
H 1.25 -1 1s2
U 98.75 3 [Rn].5f3
Synthesis
Not available
Solid state structure
• Geometry of uranium:
• Prototypical structure:



Isotope pattern
What follows is the calculated isotope pattern for the UH3 unit with the most intense ion set to 100%.
Formula: U1H3
mass %
237 0.0
238 0.7
239 0.0
240 0.0
241 100.0
242 0.0

[no1]

uranium (III) iodide
• Formula as commonly written: UI3
• Hill system formula: I3U1
• CAS registry number: [13775-18-3]
• Formula weight: 618.742
• Class: iodide
Synonyms
• uranium (III) iodide
• uranium iodide
• uranium triiodide
Physical properties
• Colour: black
• Appearance: crystalline solid
• Melting point: 766°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
I 61.53 -1 [Kr].4d10.5s2.5p6
U 38.47 3 [Rn].5f3
Synthesis
Not available
Solid state structure
• Geometry of uranium: 8 coordinate: bicapped trigonal prismatic
• Prototypical structure:



Isotope pattern
What follows is the calculated isotope pattern for the UI3 unit with the most intense ion set to 100%.
Formula: U1I3
mass %
615 0.0
616 0.7
617 0.0
618 0.0
619 100.0

[no1]

uranium (III) sulphide
• Formula as commonly written: U2S3
• Hill system formula: S3U2
• CAS registry number: [12138-13-5]
• Formula weight: 572.256
• Class: sulphide
Synonyms
• uranium (III) sulphide
• uranium sulphide
• diuranium sulphide
Physical properties
• Colour: blue-black or grey-black
• Appearance: crystalline solid
• Melting point: 1850°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
S 16.81 -2 [Ne].3s2.3p6
U 83.19 3 [Rn].5f3
Synthesis
Not available
Solid state structure
• Geometry of uranium:
• Prototypical structure:



Isotope pattern
What follows is the calculated isotope pattern for the U2S3 unit with the most intense ion set to 100%.
Formula: U2S3
mass %
566 0.0
567 0.0
568 0.0
569 1.4
570 0.0
571 0.2
572 100.0
573 2.4
574 13.3
575 0.2
576 0.7
577 0.0
578 0.0

[no1]

uranium (IV) bromide
• Formula as commonly written: UBr4
• Hill system formula: Br4U1
• CAS registry number: [13470-20-7]
• Formula weight: 557.645
• Class: bromide
Synonyms
• uranium (IV) bromide
• uranium bromide
• uranium tetrabromide
Physical properties
• Colour: brown
• Appearance: crystalline solid
• Melting point: 519°C
• Boiling point: 791°C
• Density: 5190 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
Br 57.32 -1 [Ar].3d10.4s2.4p6
U 42.68 4 [Rn].5f2
Synthesis
Not available
Solid state structure
• Geometry of uranium: 7 coordinate: pentagonal bipyramidal
• Prototypical structure:



Isotope pattern
What follows is the calculated isotope pattern for the UBr4 unit with the most intense ion set to 100%.
Formula: U1Br4
mass %
550 0.0
551 0.1
552 0.0
553 0.5
554 17.6
555 0.7
556 68.5
557 0.5
558 100.0
559 0.1
560 64.8
561 0.0
562 15.8