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MINERALOGICAL STUDY OF HALLOYSITE FROM
TALAKAG, BUKIDNON, PHILIPPINES

Bedia, E.L., Calzada C.V., de la Cuecsta, L.C., Harder, N.C.,
Martinez, E.R., Miranda, E.R., Torillo, A.R., Shimosaka, K.

 

 

 

 

ABSTRACT



Clay sample gathered from the minesite of Bo. Ticala-an Talakag, Bukidnon was investigated using X-ray diffraction, infrared analysis, thermal analysis, scanning electron microscopy, optical microscopy and chemical analysis.

Size particles of two microns and below collected by elutriation, exhibited a basal reflection at 10.0 ┼ indicating the presence of halloysite as its main constituent. IR spectra showed a considerable amount of interlayer water from 3623 to 3000 cm-1. SEM revealed the spherical shape of the mineral with a concave hole of approximately 0.1 Ám in diameter. Heat treatment conducted for X-ray and IR analyses showed the effect of heat on clay. At 500oC, the interlayer water was completely removed and the mineral was transformed to amorphous phase. Further heating at 1200oC resulted in the formation of poorly crystallized mullite.
 

 

 

 

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