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Lanthanum is traditionally counted among the rare earth elements. Like most other rare earth elements, its usual oxidation state is +3, although some compounds are known with an oxidation state of +2. Lanthanum has no biological role in humans but is used by some bacteria.
Lanthanum(III) oxide, also known as lanthana, chemical formula La 2 O 3, is an inorganic compound containing the rare earth element lanthanum and oxygen. It is used in some ferroelectric materials, as a component of optical materials, and is a feedstock for certain catalysts, among other uses.
Lanthanum manganite is an inorganic compound with the formula LaMnO 3, often abbreviated as LMO. Lanthanum manganite is formed in the perovskite structure, consisting of oxygen octahedra with a central Mn atom. The cubic perovskite structure is distorted into an orthorhombic structure by a strong Jahn–Teller distortion of the oxygen octahedra ...
The oxidation states are also maintained in articles of the elements (of course), and systematically in the table {{Infobox element/symbol-to-oxidation-state}} See also [ edit ]
Lanthanum strontium manganite (LSM or LSMO) is an oxide ceramic material with the general formula La 1−x Sr x MnO 3, where x describes the doping level. It has a perovskite -based crystal structure, which has the general form ABO 3 .
Praseodymium can form many different oxides, although the only oxides that are stable at room temperature are Pr 2 O 3, Pr 6 O 11 and PrO 2.Praseodymium(III) oxide is a green powder that forms hexagonal crystals, [14] and crystallizes in the manganese(III) oxide or bixbyite structure. [15]
Lanthanum, 57 La; Lanthanum ... oxidation-state/comment: parenthesized: brackets: brackets Note, what is shown in the infobox is not influenced by the parameter name ...
The oxidation states are also very stable; with the exceptions of SmI 2 [27] and cerium(IV) salts, [28] lanthanides are not used for redox chemistry. 4f electrons have a high probability of being found close to the nucleus and are thus strongly affected as the nuclear charge increases across the series; this results in a corresponding decrease ...