Compound with phosphate and sulfate ions
The phosphate sulfates are mixed anion compounds containing both phosphate and sulfate ions. 
Related compounds include the arsenate sulfates, phosphate selenates, and arsenate selenates.
Some hydrogen phosphate sulfates are superprotonic conductors.
Organic derivatives.
A catenated sulfophosphate has the sulfur and phosphorus joined by an oxygen atom. In biochemistry, metabolism of sulfate may use such a group, for example with adenosine-5'-phosphosulfate.
References.
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