On the shapes of dissolved crystals

Moore, Moreton

doi:10.1180/minmag.1986.050.356.23

Cited by 9 publications

(13 citation statements)

References 10 publications

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“…This is further con®rmed by the terracing around the triad axes (Fig. 2b) which is identical to that observed by Moore (1973) in single crystals of diamond that had suffered dissolution. There is therefore no doubt that the dodecahedral habit is caused by dissolution (after growth) rather than by growth.…”

Section: Twinned Rhombic Dodecahedral Diamondsupporting

confidence: 83%

“…This study was made as part of a wider X-ray topographic survey of the morphology of natural diamond (Moore, 1973;Machado, 1984;Yacoot, 1990). For a brief summary see the report by Moore (1988).…”

Section: Resultsmentioning

confidence: 99%

“…they are of the form {hk0} rather than {110}. Their morphology and mode of growth were studied by Moore (1973) and by Moore & Lang (1974). Using X-ray topography, they showed that these diamonds were formed by dissolution of octahedral diamonds and that such diamonds had not exhibited a dodecahedral habit throughout their growth history as had been suggested by Raman & Ramaseshan (1946) and Ramaseshan (1947).…”

Section: Twinned Rhombic Dodecahedral Diamondmentioning

confidence: 99%

“…In this case, operations of twinning and dissolution appear to be commutative, unlike those of growth and dissolution. [Moore (1986) discusses the effects of dissolution and growth on crystal morphology. ]…”

Section: Twinned Rhombic Dodecahedral Diamondmentioning

confidence: 99%

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Twinning in Natural Diamond. I. Contact Twins

1998

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Growth histories of contact twins of natural diamond have been elucidated by nondestructive techniques of X-ray topography, using both conventional and synchrotron sources. Re¯ection conditions for the simultaneous imaging of both members of a diamond, twinned on (111), are given. The common`triangular' contact twin, known as a macle in the diamond trade, results from {111}-faceted growth from a central nucleation site, sometimes marked by an inclusion. If this period of growth is followed by one of dissolution, then the twinned rhombic dodecahedron may result. The dissolution shape of a twinned octahedron is the same as the twin of the dissolution shape of the octahedron. A peritropic twin was found to consist of two macles fortuitously joined on their common (111) facets in only approximate twin orientation. A lozenge-shaped diamond was found to contain a twin component in the shape of an arrowhead. In all these variants, the composition`plane' can be far from planar, resulting from intergrowth of one twin component into the other.

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Section: Twinned Rhombic Dodecahedral Diamondsupporting

confidence: 83%

Section: Resultsmentioning

confidence: 99%

Section: Twinned Rhombic Dodecahedral Diamondmentioning

confidence: 99%

Section: Twinned Rhombic Dodecahedral Diamondmentioning

confidence: 99%

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Twinning in Natural Diamond. I. Contact Twins

1998

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“…Moore suggests that the shapes of mineralogical crystals result from faces becoming vertices and vertices becoming faces. 7 Frank proposes that crystals will disappear before changes in shape have ceased, 8 and Gibbs…”

Section: Introductionmentioning

confidence: 99%

Faceted crystal shape evolution during dissolution or growth

2007

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in Wiley InterScience (www.interscience.wiley.com).A model for the prediction of faceted crystal shape evolution during growth or dissolution is presented. An ab initio mechanistic model for the relative growth or dissolution rates is also described for organic molecular crystal systems. The shape evolution model proves that while growing crystals evolve toward a steady-state shape, dissolving crystals evolve away from a steady-state shape. Thus, crystals cannot achieve a steady-state during dissolution. This methodology may be used to probe crystal shapes that are obtainable by growing and/or dissolving crystals, including pharmaceutical crystals, inorganic materials and geological minerals. The technique has been successfully applied to predict the shape evolution of succinic acid growing or dissolving in water.

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Curcumin and quercetin as templates in the in vitro biomineralization of CaCO3: A comparative study on phase modulation

Paul

Das

2021

Ceramics International

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On the shapes of dissolved crystals

Cited by 9 publications

References 10 publications

Twinning in Natural Diamond. I. Contact Twins

Twinning in Natural Diamond. I. Contact Twins

Faceted crystal shape evolution during dissolution or growth

Curcumin and quercetin as templates in the in vitro biomineralization of CaCO3: A comparative study on phase modulation

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