The nine chapters deal respectively with preliminary ideas, trihedral angles, skew quadrilaterals, tetrahedra, transversals, oblique cones, spheres, inversion, and recent geometry of the tetrahedron.

Aluminophosphate (AlPO) molecular sieves (MSs) are crystalline microporous materials made from alternating PO4 tetrahedra and ...

DICP researchers synthesized a novel small-pore AlPO MS, named DNL-17, using a flexible diquaternary ammonium compound as ...