Struvite crystals are composed of which chemicals?

Struvite crystals are composed of which chemicals?

• A. Calcium potassium carbonates
• B. Oxalates
• C. Magnesium ammonium phosphates
• D. Urates

Answer: (C)

Struvite crystals are formed from magnesium, ammonium, and phosphate salts. They are magnesium ammonium phosphate, often described as struvite (magnesium ammonium phosphate hexahydrate). These crystals form in urine that becomes alkaline thanks to bacterial urease activity, which splits urea into ammonia and raises pH, promoting precipitation of these salts. That’s why struvite stones are commonly associated with UTIs caused by urease-producing bacteria. Other listed options correspond to different stone types with distinct chemistries—calcium oxalate stones and urate stones—so they do not match the composition of struvite.

Struvite crystals are formed from magnesium, ammonium, and phosphate salts. They are magnesium ammonium phosphate, often described as struvite (magnesium ammonium phosphate hexahydrate). These crystals form in urine that becomes alkaline thanks to bacterial urease activity, which splits urea into ammonia and raises pH, promoting precipitation of these salts. That’s why struvite stones are commonly associated with UTIs caused by urease-producing bacteria. Other listed options correspond to different stone types with distinct chemistries—calcium oxalate stones and urate stones—so they do not match the composition of struvite.