. "ENVO:00002982"^^ . "A group of hydrous aluminium phyllosilicate (phyllosilicates being a subgroup of silicate minerals) minerals (see clay minerals), that are typically less than 2micrometres in diameter. Clay consists of a variety of phyllosilicate minerals rich in silicon and aluminium oxides and hydroxides which include variable amounts of structural water."^^ . . "clay"^^ . "Wikipedia:Clay"^^ . . "EcoLexicon:clay"^^ . "SWEETRealm:Clay"^^ . "ENVO"^^ .