Fe100-x-yPxBy ultrafine amorphous alloy particles with 3.6 less than o
r equal to x less than or equal to 10.5 and 6.6 less than or equal to
y less than or equal to 32.0 were systematically by chemical reduction
. Information about the preparation mechanism, the particle sizes, the
crystallization of the samples and the interaction between the elemen
ts was obtained by Mossbauer spectroscopy and several other means.