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Raoelina Andriambololona, “Etude de la Monazite Brute d’Antete et de Vohibarika Manantenina. Mesure des Teneurs en Uranium et Thorium,” Annales de l’Univesité de Madagascar, Sciences de la Nature et Mathématique, No. 17, 1980, pp. 15-32.

has been cited by the following article:

• TITLE: Crystallographic Study of Uranium-Thorium Bearing Minerals in Tranomaro, South-East Madagascar

  AUTHORS: Frank Elliot Sahoa, Naivo Rabesiranana, Raoelina Andriambololona, Nicolas Finck, Christian Marquardt, Hörst Geckeis

  KEYWORDS: Tranomaro; Madagascar; Uranothorianite; Crystallography; XRD

  JOURNAL NAME: Journal of Minerals and Materials Characterization and Engineering, Vol.1 No.6, November 26, 2013

  ABSTRACT: Studies are undertaken to characterize the uranium and thorium minerals of south-east Madagascar. Seven selected uranothorianite bearing pyroxenites samples from old abandoned uranium quarries in Tranomaro, south Amboasary, Madagascar (46°28'00"E, 24°36'00"S) have been collected. To determine the mineral micro-structure, they were investigated for qualitative identification of crystalline compounds by using X-ray powder diffraction analytical method (XRD). Results showed that the uranium and thorium compounds, as minor elements, were present in various crystalline structures. Thorium, as thorianite, is present in a simple ThO2 cubic crystalline system, whereas the uranium component of the Tranomaro uranothorianite samples is oxide-based and is a mixture of complex oxidation states and crys-talline systems. Generally called uraninite, its oxide compounds are present in more than eight phases.