抄録
The diffraction intensity of Debye-Scherrer ring is generally homogeneous irrespective of the direction in which the incident beams shoot, when the crystallites are distributed in all directions in random orientation. There are some powder samples, however, for instance, those having tendency to cleave, of which the intensity distribution depends largely on the way how to mount them on the specimen holder. The present study was designed to prepare a special specimen of this kind of substance for the counter diffractometer.
In the process of packing powder specimen on the specimen holder preference can take place in orientation in the formation of crystallites, and this can be prevented by jagged specimen surface. In view of this fact special mould for making the specimen was devised. Fig. 4 shows the schematic representation of this. The final specimen was produced by stamping the powder by the use of this mould.
The special mould was applied to the analysis of the powder pattern of PbO and β-alumina whose intensities are generally uneven due to preference taking place in orientation during the packing in the formation of crystallites.
The details of the experiment are listed in Table I∼IV, in which it is clearly seen that the homogeneous powder patterns can be obtained by the choice of suitable cycle of jaggedness to be produced on the surface of the specimen.
