prov:value
| - In the following description, crystal raw materials A may be the group III and II elements such as Al, Ga, In, B, Zn, and Cd; crystal raw materials B may be the group III and II elements such as Al, Ga, In, B, Zn, and Cd; crystal raw materials C may be the group V and VI elements such as N, As, P, S, Se, and Te; impurity raw materials D may be, for example, Mg, Be, Si, O and the like; and impurity
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