isostructural polymorphism

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Indium chalcogenides — The indium chalcogenides include all compounds of indium with the chalcogen elements, oxygen, sulfur, selenium and tellurium. (Polonium is excluded as little is known about its compounds with indium). The best characterised compounds are the… … Wikipedia
Julgoldite — Infobox mineral name = Julgoldite category = Silicate mineral boxwidth = boxbgcolor = imagesize = caption = formula = (Ca,Mn)2(Fe2+,Fe3+,Mg)(Fe3+,Al)2(SiO4)(Si2O7)(OH)2(H2O) molweight = color = Black to greenish olive habit = blades or prisms.… … Wikipedia

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