Summary
Visual examination, electron-microscopic observation and infrared-spectroscopic analysis demonstrate that the thermodynamically unstable calcium oxalate trihydrate, which supposedly plays an important role in the formation of certain urinary calculi, is a commonly occurring constituent of urinary stones.
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Heijnen, W., Jellinghaus, W. & Klee, W.E. Calcium oxalate trihydrate in urinary calculi. Urol. Res. 13, 281–283 (1985). https://doi.org/10.1007/BF00262657
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DOI: https://doi.org/10.1007/BF00262657