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Description : Common crystals seen even in healthy patients include calcium oxalate, triple phosphate crystals and amorphous phosphates. The crystals shown above are typical triple phosphate crystals, found in feline and canine urine, and are classically described as rectangular coffin lid shape.
Struvite (magnesium ammonium phosphate) is a phosphate mineral with formula: NH 4 MgPO 4 Â·6H 2 O. Struvite crystallizes in the orthorhombic system as white to yellowish or brownish-white pyramidal crystals or in platey mica-like forms.t is a soft mineral with Mohs hardness of 1.5 to 2 and has a low specific gravity of 1.7. It is sparingly soluble in neutral and alkaline conditions, but readily soluble in acid. Struvite urinary stones and crystals form readily in the urine of animals and humans that are infected with ammonia-producing organisms.