Names | |
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IUPAC name Triiodoneodymium | |
Other names Neodymium triiodide, Neodymium iodide | |
Identifiers | |
3D model (JSmol) | |
ChemSpider | |
ECHA InfoCard | 100.034.047 |
EC Number |
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PubChem CID | |
CompTox Dashboard (EPA) | |
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Properties | |
NdI3 | |
Molar mass | 524.96 g/mol |
Appearance | Green solid |
Melting point | 684 °C (1,263 °F; 957 K) |
Structure | |
9 | |
Hazards | |
GHS labelling: | |
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Danger [2] | |
Related compounds | |
Other anions | Neodymium acetate, Neodymium hydride, Neodymium nickelate |
Other cations | erbium iodide, cerium iodide, terbium iodide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). |
Neodymium(III) iodide is an inorganic salt of iodine and neodymium with the formula NdI3. [3] Neodymium uses the +3 oxidation state in the compound. The anhydrous compound [2] is a green powdery [2] solid at room temperature.
Heating neodymium and iodine in an inert atmosphere produces this salt:[ citation needed ]
It can also be prepared by the reaction of neodymium(III) oxide and hydroiodic acid to make a hydrate: [4]
The anhydrate can then be obtained by heating the nonahydrate with ammonium iodide: [4]
Neodymium(III) iodide forms green, water-soluble hygroscopic crystals. It has a melting point of 784°C. It forms a nonahydrate crystal NdI3.9H2O – belongs to the orthorhombic crystal system, space group Pmmn, lattice constants a = 1.16604 nm, b = 0.80103 nm, c = 0.89702 nm, Z = 4. [5]
NdI3 also forms some compounds with N2H4, such as NdI3·3N2H4·2H2O which is a dark green crystal, soluble in methanol and ethanol and insoluble in water, benzene and toluene, d20°C = 3.42 g/cm³. [6]
NdI3 also forms some compounds with urea, such as NdI3 5CO(NH2)2 which is a lavender color crystal. [7]
NdI3 also forms some compounds with thiourea, such as NdI3·2CS(NH2)2·9H2O which is a pale pink crystal. [8]
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: CS1 maint: multiple names: authors list (link)