prov:value
| - The oxides, hydroxides and/or hydrous oxides in the present invention comprising an element selected from the group consisting of Ti, Zr, Si, Al, Mn and Zn, (hereinafter referred to as oxides, hydroxides and/or hydrous oxides") include, for instance, oxides such as TiO2, ZrO2, SiO2, Al2 O3, MnO, MnO2, ZnO, etc.; hydroxides such as Ti(OH)2, Ti(OH)4, Zr(OH)4, Si(OH)4, A(OH)3, Mn(OH)2, Zn(OH)2, etc.
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