Neglected Factors in the Development of Thermal Springs.

The arrangement of the centers of the molecules in the crystal is that corresponding to the diamond structure. Each molecule is surrounded tetrahedrally by four molecules. If we consider a molecule as roughly tetrahedral in shape with similar orientation to the tetrahedron formed by the four beryllium atoms, then the adjacent molecules are so oriented as to present tetrahedral faces to one another. Interatomic distances for carbon and oxygen atoms in the crystal are given in table 2 (up to 4.5 A). It is seen that the molecules pack snugly together, each methyl and carboxyl carbon and carboxyl oxygen atom having eight or twelve neighbors in adjacent molecules at distances between 3.22 and 4.10 A.