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Potassium Platinonitrite, K2Pt(NO2)4

Potassium Platinonitrite, K2Pt(NO2)4, which may be prepare by adding potassium nitrite to a solution of potassium chlor-platinite in the requisite proportions. Upon cooling the salt separates out in colourless monoclinic crystals which are anhydrous. Upon recrystallisa tion from pure water, the dihydrate, K2Pt(NO2)4.2H2O, is obtained in rhombic crystals.
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