Figure 4
(a) The parent crystal (left) generates a second one which is not twinned: it is obtained by homo-epitaxy in which a pinacoidal {010} face adheres to a parent prismatic {110} one. (b) A detailed version of the drawing in (a); both carbonate and calcium ions are represented in such a way that the continuity between parent (P) and homo-epitaxy (H) structures is emphasized. (c) From the parent crystal both a twinned (T) (110) and a homo-epitaxy individual (H2) are generated. (d) Another equivalent (H1) is made, always by the same homo-epitaxy law. Hence a triple aggregate has been obtained by homo-epitaxy only. |