Figure 1.
Crystal structure of a) orthorhombic β‐Ag8SnSe6 and b) cubic γ‐Ag8SnSe6. Red, yellow, and blue balls represent Ag, Sn, and Se atoms, respectively. c) X‐ray powder diffraction for Ag8Sn1− xNbxSe6 (x ≤ 0.05) shows no impurity peaks.
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