title: [Newberyte in old calculi of the urinary system].
abstract: In 542 old calculi belonging to the collection complied by Dr. P. Cifuentes Díaz, we have found newberyte in 81 calculi (14.9%). Newberyte appears in the struvite and apatite calculi in the form of small crystals looking like a mosaic. This results from the transformation of the struvite when it loses NH3 and H2O which we have only found in old urinary calculi.
mesh_terms: D006801:Humans; D008274:Magnesium / Q000378:metabolism; D017616:Magnesium Compounds; D008853:Microscopy; D010710:Phosphates / Q000378:metabolism; D013055:Spectrophotometry, Infrared; D000069877:Struvite; D014545:Urinary Calculi / Q000378:metabolism
chemical_list: D017616:Magnesium Compounds; D010710:Phosphates; C030781:magnesium phosphate; D000069877:Struvite; D008274:Magnesium
vernacular_title: Newberyta en cálculos antigous del aparato urinario.