Step dynamics and spiral growth on calcite

The Use of Scanning Probe Microscopy to Investigate Crystal-Fluid Interfaces

“…Quantitative measurements of velocity versus supersaturation are found in the literature for a variety of solution grown crystals including minerals such as calcite [33,34], barite [35,36], hydroxyapatite [37]; optical crystals such as ammonium dihydrogen phosphate (ADP) [38] and potassium dihydrogen phosphate (KDP) [39]; several proteins [40][41][42][43][44]; and organic crystals such as hydrogen bonded tapes [45] and uric acid [46]. Land and De Yoreo tabulate kinetic coefficients for several systems [41] demonstrating that they vary over several orders of magnitude.…”

In-Situ Atomic Force Microscope Imaging of Calcite Etch Pit Morphology Changes in Undersaturated and 1-Hydroxyethylidene-1,1-diphosphonic Acid Poisoned Solutions

“…Calcite, CaCO 3 , growth and dissolution mechanisms in supersaturated and undersaturated solutions, respectively, have been elucidated on the atomic-scale using the AFM. [2][3][4][5][6][7] AFM analysis of crystal growth in the presence of inhibitors such as 1-hydroxyethylidene-1,1-diphosphonic acid(HEDPor etidronic acid) has also been reported. 8,9 The morphology of surface features on the (1014) cleavage plane of calcite is generally rhombic.…”

“…8,9 The morphology of surface features on the (1014) cleavage plane of calcite is generally rhombic. [2][3][4]6,[8][9][10] Both positive surface features (terraces and hillocks) and negative surface features (pits) display this rhombic morphology. Furthermore, the orientation of all the rhombic features on the (1014) cleavage plane is the same, with the short and long diagonals of the rhomboid running parallel to the [221] and [010] crystal indices, respectively as shown in Figure 1.…”

Advances in dissolution understanding and their implications for cement hydration

“…Dislocations may be categorically characterized by the Burgers vector, , which describes the internal displacement of the lattice by the dislocation itself (relevant review in [7]). A key insight into the relationship between crystal stability and dissolution mechanism of crystals came with Frank's [8] recognition that screw dislocations in minerals of appropriate physical characteristics (sufficient elastic moduli, surface energy, and Burgers vector modulus) would give rise to so-called hollow cores (now readily visible by AFM [9,10,11]). These are spontaneously developed capillaries surrounding the dislocation axis, reflecting an energetic balance between the excess strain energy contributed by the dislocation itself and the positive surface work expended in expansion of the capillary's interior surface.…”