Yoshinaga, "Imogolite, a hydrated aluminium silicate of tubular structure," Nature, vol.
Tait, "Synthesis of imogolite: a tubular aluminium silicate polymer," Journal of the Chemical Society, Chemical Communications, no.
At 700[degrees]C, XRD patterns showed the phase formation of [Li.sub.2]Si[O.sub.3], lithium aluminium silicate, [Li.sub.2][Si.sub.2][O.sub.5], [Ca.sub.5][(P[O.sub.4]).sub.3]F, and Si[O.sub.2]: high quartz.
At 700[degrees]C, the peaks corresponded to [Li.sub.2]Si[O.sub.3], [Li.sub.3]P[O.sub.4], [Li.sub.2][Si.sub.2][O.sub.5], [Ca.sub.5][(P[O.sub.4]).sub.3]F, lithium aluminium silicate, and Si[O.sub.2] in the form of the high quartz observed.
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Calcium aluminium silicates
are represented by silication katoite [Ca.sub.3][Al.sub.2](Si[O.sub.4])(OH)8 (PDF pattern no.