silica group

== English == === Noun === silica group (plural silica groups) (mineralogy) A large group of silicate minerals having a silicon to oxygen ratio of 1:2. This group includes many silicates of sodium, potassium, calcium, and aluminum in an open network structure. ==== Hypernyms ==== group ==== Translations ==== === See also === members of the silica group agate chalcedony quartz tridymite cristobalite opal feldspars feldspathoids sodalite group scapolite (Wernerite) series zeolite family