Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/98984
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dc.titleNanometre scale textures in agate and Beltane opal
dc.contributor.authorLu Taijing
dc.contributor.authorZhang, X.
dc.contributor.authorSunagawa, I.
dc.contributor.authorGroves, G.W.
dc.date.accessioned2014-10-16T09:53:49Z
dc.date.available2014-10-16T09:53:49Z
dc.date.issued1995
dc.identifier.citationLu Taijing,Zhang, X.,Sunagawa, I.,Groves, G.W. (1995). Nanometre scale textures in agate and Beltane opal. Mineralogical Magazine 59 (1) : 103-109. ScholarBank@NUS Repository.
dc.identifier.issn0026461X
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/98984
dc.description.abstractThe paper describes TEM observations of agates of geode origin and Beltane opals. Optically observable individual fibres in agates are composed of many fine fibres which consist of quartz crystallites of 8 to 100 nm in length stacked together parallel to or with c-axes perpendicular to the fibre elongation. The optically observable systematic striations in agate are found to consist of cyclic alternation of layers due to variation in grain size and porosity. Large quartz crystals, protruding into the spaces of geodes, represent the last stage of formation of these bands, and are merely a continuation of the banding sequence. Nanometre scale textures of cristobalite fibres were revealed in Beltane opals. The cristobalite crystallites have the size of 3 to 20 nm in length and are also stacked together. The results suggest that embryonic particles were formed in their corresponding growth environments and agglutinated to form fibres. -Authors
dc.sourceScopus
dc.typeOthers
dc.contributor.departmentPHYSICS
dc.description.sourcetitleMineralogical Magazine
dc.description.volume59
dc.description.issue1
dc.description.page103-109
dc.identifier.isiutNOT_IN_WOS
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