silica  search
RTabrasives
 glass materials
 Ottawa Sand
 sand
 sands
 silica minerals
 silicates
 siliceous composition
 silicic acid
 silicon
SNAs of 1985, no longer considered a commodity term (list C). Used for silicon dioxide.
silica group  search
USEsilica minerals
silica minerals  search
BTsilicates
 .framework silicates
 ..silica minerals
NTagate
 amethyst
 carnelian
 chalcedony
 chrysoprase
 coesite
 cristobalite
 hyalite
 jasper
 keatite
 lechatelierite
 melanophlogite
 moganite
 onyx
 opal
 quartz
 smoky quartz
 stishovite
 tridymite
UFsilica group
RTsilica
silicate glass  search
SNAs of 1998, not a valid term for GeoRef. Use (volcanic glass or glasses) AND (silicates or siliceous composition). For natural glasses which are not volcanic, glass materials is be used. See silicate melts if applicable.
silicate melts  search
BTmelts
 .silicate melts
RTpetrology
 magmas
 geophysics
 phase equilibria
 liquid phase
SNAlso search silicates and melts.
silicate minerals  search
USEsilicates
silicate rocks  search
RTpetrology
 rocks
 siliceous composition
 standard materials
silicates  search
NTaluminosilicates
 asbestos
 barium silicates
 borosilicates
 chain silicates
 chlorophaeite
 framework silicates
 iron silicates
 magnesian silicates
 orthosilicates
 ring silicates
 sheet silicates
UFsilicate minerals
RTsilica
 minerals
 clay mineralogy
 silicon
SNIn indexing, use this term only for broad treatments of the entire class of minerals; otherwise, use a narrower term, e.g. orthosilicates, ring silicates, chain silicates, etc.