Potassium Chloroplatinite

Potassium chloroplatinite is K₂PtCl₄, -ate is K₂PtCl₆. They are also known as potassium tetrachloroplatinate(II) and potassium hexachloroplatinate(IV). See e.g. https://www.sigmaaldrich.com/GB/en/product/aldrich/323411

Hello the difference between the named substances is the chemical formula. Potassiumchlorplatinite is a different chemical as Potassiumchlorplatinate. The differnce is the charge number of the platinum ion which forms the anion complex with the Chlorine.
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Potassium Chloroplatinite = K₂PtCl₄
Potassium Chloroplatinate = K₂KCl₆