Struverite

Formula : Unspecified
CAS : 12199-39-2 

Ta &/or Nb-rich rutile(TiO2); has high content of rare earth elements and actinide elements.

Struvite

Formula : H3-N.H3-O4-P.6H2-O.Mg
CAS : 15490-91-2 

The mineral magnesium ammonium phosphate with the formula NH4MgPO4. It is associated with urea-splitting organisms in a high magnesium, high phosphate, alkaline environment. Accumulation of crystallized struvite is found in the urinary tract as struvite CALCULI and as scale on sewage system equipment and wastewater pipes.