dc.contributor.author |
Saminpanya S. |
|
dc.date.accessioned |
2021-04-05T03:23:28Z |
|
dc.date.available |
2021-04-05T03:23:28Z |
|
dc.date.issued |
2016 |
|
dc.identifier.issn |
8120099 |
|
dc.identifier.other |
2-s2.0-84999622168 |
|
dc.identifier.uri |
https://ir.swu.ac.th/jspui/handle/123456789/13354 |
|
dc.identifier.uri |
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84999622168&doi=10.1080%2f08120099.2016.1251492&partnerID=40&md5=6d430a736596a4fdf54fba89fcb5399e |
|
dc.description.abstract |
Thai silicified woods were examined using electron probe microanalysis, yielding chemical data that characterised the samples into two groups: low and high silica contents (82—94 wt% and 94—98 wt%). The elements analysed in order of abundance include Si > Fe > Ca > Na > Al > Ti > K > Mg > Mn > Zr. Iron plays a major role in the colour range (red, orange, yellow, brown, grey and black) of the samples. Calcium is associated with Fe in the darker colours of the wood. Pseudo-crystallochemistry has been used for the substitution of trace elements for Si4+ in silica polymorphs. The atomic channels that run parallel to the c-axis of silica polymorphs or lattice defects, or even the charge balance for trivalent-ion substitution for Si4+, can accommodate monovalent ions (K+ and Na+). Vacant and atomic cavities, which are charged balanced by trivalent ions [Al3+ or Fe3+ substituting for Si4+], are commonly occupied by divalent ions (Ca2+, Mg2+ and Mn2+). Quadrivalent ions, Ti4+ and Zr4+ are non-structurally incorporated but form clusters of mineral inclusions in the samples. Several other trace-element contents are also in the form of mineral/fluid inclusions hosted in the woods. © 2016 Geological Society of Australia. |
|
dc.subject |
abundance |
|
dc.subject |
calcium |
|
dc.subject |
color |
|
dc.subject |
electron probe analysis |
|
dc.subject |
geochemistry |
|
dc.subject |
silica |
|
dc.subject |
substitution |
|
dc.subject |
trace element |
|
dc.subject |
wood |
|
dc.subject |
Thailand |
|
dc.title |
Trace elements and mineral chemistry of silicified wood from Thailand: colours and elemental distribution |
|
dc.type |
Article |
|
dc.rights.holder |
Scopus |
|
dc.identifier.bibliograpycitation |
Australian Journal of Earth Sciences. Vol 63, No.7 (2016), p.873-884 |
|
dc.identifier.doi |
10.1080/08120099.2016.1251492 |
|