Mechanism of Twinning in Aragonite
نویسندگان
چکیده
منابع مشابه
Aragonite twinning in the molluscan bivalve hinge ligament.
Molluscan bivalve hinge ligaments are composed of long needle-shaped aragonite crystals embedded in a protein matrix. These crystals are twinned and, in general, the twin forms a thin lamella through the center of the crystal.
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The occurrence frequency of the {110} twin in aragonite is explained by the existence of an important substructure (60% of the atoms) which crosses the composition surface with only minor perturbation (about 0.2 Å) and constitutes a common atomic network facilitating the formation of the twin. The existence of such a common substructure is shown by the C2/c pseudo-eigensymmetry of the crystallo...
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Suzhi Li,1 Xiangdong Ding,1,2,*,† Junkai Deng,1,3 Turab Lookman,2,*,‡ Ju Li,1,4 Xiaobing Ren,1,3 Jun Sun,1 and Avadh Saxena2 1State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China 2Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA 3Ferroic Physics Group, National Institute for Materials Science, Tsukuba, 3...
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Predicting the conditions in which a compound adopts a metastable structure when it crystallizes out of solution is an unsolved and fundamental problem in materials synthesis, and one which, if understood and harnessed, could enable the rational design of synthesis pathways toward or away from metastable structures. Crystallization of metastable phases is particularly accessible via low-tempera...
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We demonstrate direct evidence that a single-crystal-like aragonite platelet is essentially assembled with aragonite nanoparticles. The aragonite nanoparticles are readily oriented and assembled into pseudo-single-crystal aragonite platelets via screw dislocation and amorphous aggregation, which are two dominant mediating mechanisms between nanoparticles during biomineralization. These findings...
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ژورنال
عنوان ژورنال: Journal of the Mineralogical Society of Japan
سال: 1966
ISSN: 1883-7018,0454-1146
DOI: 10.2465/gkk1952.8.94