bearing ludwigite on the Mg2(Al,Fe)BO5 - Mg 2AlBO5 join was synthesized in a standard externally-heated pressure vessel over a temperature range of 600-700 °C, with pressures of 500-1000 bar, for a period of three days. Four starting mixtures were used: (1) Mg2(Fe075Al025)BO 5, (2) Mg2(Fe05Al05)BO5, (3) Mg 2(Fe025Al075)BO5, and (4) Mg 2AlBO5. Products were examined by X-ray diffraction (XRPD) and electron microscopy with an energy-dispersive spectrometer (SEM/EDS). In these experimental conditions, single-phase Al-bearing ludwigite was only obtained at high temperature and pressure (700 °C, 1000 bar), since reactions were only partially completed at lower temperatures and pressures. The chemical composition of Al-bearing ludwigite was generally close to that of the starting materials, especially for those with lower aluminum content. Variations in cell parameters were nearly linear, as a function of composition. These results may improve our understanding of the varied occurrence of natural Al-rich ludwigite minerals.
Synthesis of ludwigite along the Mg2FeBO5 – Mg2AlBO5 join / Bloise, Andrea; Barrese, E; Apollaro, Carmine; Miriello, Domenico. - In: NEUES JAHRBUCH FUR MINERALOGIE-ABHANDLUNGEN. - ISSN 0077-7757. - 187(2010), pp. 217-223.
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|Titolo:||Synthesis of ludwigite along the Mg2FeBO5 – Mg2AlBO5 join|
BLOISE, Andrea (Corresponding)
|Data di pubblicazione:||2010|
|Citazione:||Synthesis of ludwigite along the Mg2FeBO5 – Mg2AlBO5 join / Bloise, Andrea; Barrese, E; Apollaro, Carmine; Miriello, Domenico. - In: NEUES JAHRBUCH FUR MINERALOGIE-ABHANDLUNGEN. - ISSN 0077-7757. - 187(2010), pp. 217-223.|
|Appare nelle tipologie:||1.1 Articolo in rivista|