| http://www.w3.org/ns/prov#value | - Oxides of respective metal may be used as the starting material of hybrid oxides powder, however, there is a case that a mono phase of perovskite or pseudo-perovskite is easily obtained using metal salt of acetic acid, nitric acid, carbonic acid, phosphoric acid, sulfuric acid, etc., organic compounds and inorganic compounds of the respective metal.
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