| Reference Type | Journal (article/letter/editorial) |
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| Title | Water in sphere-type opal |
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| Journal | Mineralogical Magazine |
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| Authors | Jones, J. B. | Author |
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| Segnit, E. R. | Author |
| Year | 1969 (September) | Volume | 37 |
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| Issue | 287 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_37/37-287-357.pdf+ |
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| DOI | doi:10.1180/minmag.1969.037.287.07Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 6296 | Long-form Identifier | mindat:1:5:6296:5 |
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| GUID | 0 |
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| Full Reference | Jones, J. B., Segnit, E. R. (1969) Water in sphere-type opal. Mineralogical Magazine, 37 (287) 357-361 doi:10.1180/minmag.1969.037.287.07 |
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| Plain Text | Jones, J. B., Segnit, E. R. (1969) Water in sphere-type opal. Mineralogical Magazine, 37 (287) 357-361 doi:10.1180/minmag.1969.037.287.07 |
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| In | (1969, September) Mineralogical Magazine Vol. 37 (287) Mineralogical Society |
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| Abstract/Notes | SummarySurface areas of ‘amorphous’-type opals measured by nitrogen-absorption techniques were not consistent either with the surface area of the spheres of about 2000 Å diameter observable by electron microscopy or with the thermal dehydration data. This apparent inconsistency can be explained in terms of a smaller particulate structure of the order of 100–200 Å shown by higher resolution electron micrographs. This structure also accounts for a marked shrinkage shown in dilatometer curves of this type of opal. |
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