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Neodymium(III) oxide or neodymium sesquioxide is the chemical compound composed of neodymium and oxygen with the formula Nd 2 O 3. It forms very light grayish-blue hexagonal crystals. [ 1 ] The rare-earth mixture didymium , previously believed to be an element , partially consists of neodymium(III) oxide.
Neodymium(III) carbonate is the carbonate of neodymium where neodymium exhibits the +3 oxidation state. It can be obtained by reacting neodymium(III) chloride with ammonium bicarbonate in water or from the hydrolysis of neodymium(III) chloroacetate: [14] 2Nd(C 2 Cl 3 O 2) 3 + 3H 2 O → Nd 2 (CO 3) 3 + 6CHCl 3 + 3CO 2 Neodymium acetate powder ...
Like its neighbor praseodymium, it readily burns at about 150 °C to form neodymium(III) oxide; the oxide then peels off, exposing the bulk metal to the further oxidation: [14] 4Nd + 3O 2 → 2Nd 2 O 3. Neodymium is an electropositive element, and it reacts slowly with cold water, or quickly with hot water, to form neodymium(III) hydroxide: [21]
Sulfur trioxide (alternative spelling sulphur trioxide) is the chemical compound with the formula SO 3. It has been described as "unquestionably the most [economically] important sulfur oxide". [ 1 ] It is prepared on an industrial scale as a precursor to sulfuric acid .
Neodymium(III) sulfate is a salt of the rare-earth metal neodymium that has the formula Nd 2 (SO 4) 3. It forms multiple hydrates, the octa-, penta-, and the dihydrate, which the octahydrate is the most common. This compound has a retrograde solubility, unlike other compounds, its solubility decreases with increasing temperature. [3]
Neodymium(III) oxalate is the oxalate salt of neodymium, with the chemical formula of Nd 2 (C 2 O 4) 3 in the anhydrous or hydrate form. Its decahydrate decomposes to the anhydrous form when heated, and when heated further, decomposes to Nd 2 O 2 C 2 O 4, [2] finally obtaining neodymium(III) oxide. [3] It dissolves in hydrochloric acid to form ...
Heating neodymium and iodine in an inert atmosphere produces this salt: [citation needed] 2 Nd + 3 I 2 → 2 NdI 3. It can also be prepared by the reaction of neodymium(III) oxide and hydroiodic acid to make a hydrate: [4] Nd 2 O 3 + 6 HI → 2 NdI 3 + 3 H 2 O. The anhydrate can then be obtained by heating the nonahydrate with ammonium iodide: [4]
Neodymium(III) sulfide is a inorganic chemical compound with the formula Nd 2 S 3 [2] composed of a two neodymium atoms in the +3 oxidation state and three sulfur atoms in the -2 oxidation state. Like other rare earth sulfides, neodymium(III) sulfide is used as a high-performance inorganic pigment.