Triple phosphate (ammonium magnesium phosphate) crystals are commonly seen in alkaline urine. In their routine form, they are easily identified by their prism shape that frequently resembles ...

Triple phosphate crystals may be normal but often are associated with alkaline urine and UTI (typically associated with Proteus species). These crystals are colorless and have a characteristic ...

triple phosphate crystal in urine It can be found in chronic cystitis and enlarged prostate   Source: http://www.udel.edu