X-ray powder diffraction used as a tool to investigate kidney calculi stones
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2009
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ENCONTRO NACIONAL DE FISICA DA MATERIA CONDENSADA, 32.
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The X-ray powder diffraction
(XRPD) technique was used to study the phase composition of human renal calculi. The stones were colleted
from 56 donors of Vit´oria City, Esp´ırito Santo State -
southeast - Brazil.
A XRD phase quantification reveals that 61% of the
studied renal stones are composed exclusively by calcium oxalate (34% formed only by calcium oxalate monohydrate and 27% presents on both monohydrate and
dihydratate calcium oxalate). The 39% multi composed
calculi have various other phases such as uric acid and
calcium phosphate. An investigation of XRD data of
one apparent monophasic (COM) renal calculus revealed the presence of a small amount of hydroxyapatite.
The presence of this second phase and the morphology
of the stone (ellipsoidal) indicated that this calculus can
be classified as non-papillary type and its nucleation
process developed in closed kidney cavities.
A study of the phase transformation of monohydrate
calcium oxalate into calcium carbonate CaCO3 was carried out by annealing of a monophasic monohydrate calcium oxalate calculi at 200, 300, and 400 Celsius temperatures during 48 hours in a N2 gas atmosphere. It was
concluded that X-ray powder diffraction can be used as
suitable technique to study the composition and phase
diagram of renal calculi.
Como referenciar
LOPES, THERRY; KUPLICH, LETICIA; SOUZA, DANILO; ORLANDO, CINTIA; BELICH, HUMBERTO; DEPIANTI, JANAINA; MEDEIROS, EDNA; ORLANDO, MARCOS. X-ray powder diffraction used as a tool to investigate kidney calculi stones. In: ENCONTRO NACIONAL DE FISICA DA MATERIA CONDENSADA, 32., 11-15 de maio, 2009, Aguas de Lindoia, SP. Resumo... p. 318. Disponível em: http://repositorio.ipen.br/handle/123456789/22786. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.