| Reference Type | Journal (article/letter/editorial) |
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| Title | Synthesis, properties, and dehydroxylation of members of the crandallite-goyazite series |
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| Journal | Mineralogical Magazine | ISSN | 0026-461X |
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| Authors | Gilkes, R. J. | Author |
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| Palmer, B. | Author |
| Year | 1983 (June) | Volume | 47 |
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| Issue | 343 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_47/47-343-221.pdf+ |
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| DOI | doi:10.1180/minmag.1983.047.343.13Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 3503 | Long-form Identifier | mindat:1:5:3503:7 |
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| GUID | 0 |
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| Full Reference | Gilkes, R. J., Palmer, B. (1983) Synthesis, properties, and dehydroxylation of members of the crandallite-goyazite series. Mineralogical Magazine, 47 (343) 221-227 doi:10.1180/minmag.1983.047.343.13 |
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| Plain Text | Gilkes, R. J., Palmer, B. (1983) Synthesis, properties, and dehydroxylation of members of the crandallite-goyazite series. Mineralogical Magazine, 47 (343) 221-227 doi:10.1180/minmag.1983.047.343.13 |
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| In | (1983, June) Mineralogical Magazine Vol. 47 (343) Mineralogical Society |
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| Abstract/Notes | AbstractUnit-cell parameters of synthesized members of the crandallite (a = 7.007 Å, c = 16.216 Å)-goyazite (a = 7.013 Å, c = 16.650 Å) series vary linearly with composition between end-members. Most members of the series consist of 0.1 μm platy crystals, but crandallite also contains some larger (1–5 µm) tapered crystals elongated along the c axis.With increasing Sr substitution the dehydroxylation temperature decreases from c. 475 °C for crandallite to 420 °C at 20 mole % Sr, and then increases to 440 °C for goyazite. Partial dehydroxylation of crandallite is accompanied by contraction of the c unit cell parameter and expansion of a, thereby retaining an unaltered unit cell volume. The much greater sensitivity of c to both Sr substitution and dehydroxylation may be due to the rigidity of continuous sheets of Al(OH)4O2 octahedra which are parallel to the (001) plane in these minerals. |
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