Icosahedral coordination of phosphorus in the crystal structure of melliniite, a new phosphide mineral from the Northwest Africa 1054 acapulcoite by Giovanni Pratesi, Luca Bindi, and Vanni Moggi-Cecchi (vol. 91, 451–454, 2006, DOI: 10.2138/am.2006.478).

Structure determination performed by us demonstrated that P atoms in melliniite are coordinated by 12 metal atoms in a somewhat distorted icosahedral arrangement, but our claim that melliniite is the first phase with so high a coordination number for phosphorus is not true. Sergey N. Britvin and Sergey V. Krivovichev (St. Petersburg State University) kindly pointed out to us that icosahedral coordination of phosphorus...

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