👉 Gellants are a class of compounds that have octahedral symmetry. They are composed of two types of atoms, one with an octet and another with a tetrahedrally symmetrical octet. The term "gellants" refers to these compounds because they possess the unique property of having octahedral symmetry, which allows them to be arranged in a regular icosahedral lattice. Gellants are also known as octahydrides or octahedral derivatives.