Fig. 1
From: Penta- and hexa-coordinated beryllium and phosphorus in high-pressure modifications of CaBe2P2O8
Crystal structure of hurlbutite, CaBe2P2O8, at ambient conditions25. BeO4 and PO4 tetrahedra are given in blue and yellow, respectively. Ca and O atoms are given as blue and red spheres, respectively. Black solid line outlines a unit cell
