P-Cristo-balite Structural Type

The counter-ions of oxygen are located inside the elementary cell tet-rahedrally coordinating each internal atom of silicium. 

The SiO tetrahedra through its 0-vertices coordinate each with four atom of silicium one of the vertices and three from the faces of the elementary cell. The atoms of oxygen are collinearly located, at the half of the distance between two atoms of silicium. Therefore, the elementary cell contains a number of counter-ions 0 4 (4) = 16 0 . 

The multiplicity of the structure has the n = 8 value and the structural formula of P-cristo-balite looks like  

TABLE 4.10 Crystalline Substances of Cuprite (Cu O) Type after (Chiriac-Putz-Chiriac, 2005) 

Quantum Nanochemistry—Volume IV Quantum Solids and Orderability 

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