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Ca(Po3)2 does not exist because the oxidation state of Ca in this case is +6.
For the formula as written technically he is right.Not that it helps much, and in the context most of the information posted - although correct - is just showing off.
Ca(PO3)2 is the empirical formula of calcium metaphosphate. It is a polymer (Ca(PO3)2)n - n from 2 up. with n=2 show cyclic form of cyclotetraphosphate.Oxidation number for P =+5Added:Phosphite ion has an overall charge of -2 and structure HPO32-
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