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An X-ray diffraction procedure has been developed to measure accurately the textures of thin wires so that the texture variation across the wire radius may be obtained. Since X-rays penetrate no further than the surface of most metals, X-ray examination can be considered to be superficial for large wires but by thinning the wire it is possible to obtain the texture variation across its radius. When the diameter is very small, X-rays can penetrate a significant proportion of the wire. In these cases a new technique using the texture changes between several thinning procedures allows a precise understanding of the texture variation between the surface and the core of the wire. To illustrate the application of this procedure, some examples are given for 175 ~tm steel cord.

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Two new orientations of magnetite formed on haematite α‐Fe2O3 after low‐temperature reduction of a single crystal have been shown by means of X‐ray texture analysis. These are: orientation C, (113)M ||(00.1)H, (110)M||(10.0)H; orientation D, (115)M||(00.1)H, (110)M||(10.0)H.

At the moment, routine texture analysis is limited by the time required for data recording. A method allowing simultaneous acquisition of several pole figures with the use of several detectors or a position‐sensitive detector is described. Because of the simultaneity, the movements of the texture goniometer used for one pole figure are also used at the same time to obtain the other pole figures. The complete geometric arrangement and the scanning of pole figures are explained for reflection and transmission measurements. The blind area, the absorption intensity correction and the defocusing phenomenon are discussed with respect to the sample. For some examples, the results obtained by this method are compared with those obtained by the usual method employed for the measurement of a single pole figure.

It is shown that the principal topotaxial relationship between hematite a-Fe203 and magnetite Fe304 during cycles of reduction and oxidation can be considered as crystallographically reversible. The precision of the mutual orientation of the two lattices decreases as the number of cycles of reduction and oxidation increases and there is a correlation between crystallographic orientation and the rate of oxidation and of reduction.