Crystal phase information extraction apparatus, crystal phase information extraction method and storage medium

A crystal phase information extraction method comprising:

• estimating first crystal phase information on a first polycrystalline material;
• and
• performing, using the first crystal phase information, iterative optimization on diffraction data acquired from a second polycrystalline material having a component ratio of a crystal phase of interest smaller than that of the first polycrystalline material, and estimating second crystal phase information on the second polycrystalline material.

A non-transitory computer readable storage medium including computer executable instructions, wherein the instructions, when executed by a processor, cause the processor to perform operations comprising:

• estimating first crystal phase information on a first polycrystalline material;
• and
• performing, using the first crystal phase information, iterative optimization on diffraction data acquired from a second polycrystalline material having a component ratio of a crystal phase of interest smaller than that of the first polycrystalline material, and estimating second crystal phase information on the second polycrystalline material.