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Crystal growth and the fast reaction paradox: Mathematical resolution and implications for habit and compositional zoning
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P. Ortoleva
Veröffentlicht/Copyright:
1. April 2015
Fast reactions in the medium from which a crystal is growing (e.g., H+ + HCO-3 ↔ H2CO3) occurring near the crystal surface can conflict with the stoichiometry of crystal formula-unit creation (e.g., CO2-3 is readily incorporated in calcite but H+ is not). As a result, a thin fast-reaction boundary layer (FRBL) is created within which the fast reactions are out of equilibrium even though they are maintained at equilibrium far from the crystal surface. The FRBL corrects the fluxes of components to and from the surface of the crystal; not taking the FRBL into account leads to violation of mass conservation. This “paradox” is resolved by showing how the equations of crystal growth can be solved in the fast-reaction limit without violating mass conservation. As this paradox was not understood in the literature, models and geological conclusions drawn should be re-examined.
Received: 2008-1-30
Accepted: 2008-7-24
Published Online: 2015-4-1
Published in Print: 2009-1-1
© 2015 by Walter de Gruyter Berlin/Boston
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Schlagwörter für diesen Artikel
Crystal growth;
oscillatory crystal zoning;
calcite;
equilibrium;
multiscale analysis
Artikel in diesem Heft
- Amorphous materials: Properties, structure, and durability. The viscosity of hydrous NaAlSi3O8 and granitic melts: Configurational entropy models
- Alteration mineralogy and the effect of acid-leaching on the Pb-isotope systematics of ocean-island basalts
- Color origin and heat evidence of paleontological bones: Case study of blue and gray bones from San Josecito Cave, Mexico
- Coexistence of pyroxenes jadeite, omphacite, and diopside/hedenbergite in an albite-omphacite rock from a serpentinite mélange in the Kurosegawa Zone of Central Kyushu, Japan
- Amphibole equilibria in mantle rocks: Determining values of mantle aH2O and implications for mantle H2O contents
- Experimental fluoridation of nanocrystalline apatite
- Dehydration dynamics of barrerite: An in situ synchrotron XRPD study
- Structural features in Tutton’s salts K2[M2+(H2O)6](SO4)2, with M2+ = Mg, Fe, Co, Ni, Cu, and Zn
- Incorporation of water in iron-free ringwoodite: A first-principles study
- Temperature dependence of reflectance spectra and color values of hematite by in situ, high-temperature visible micro-spectroscopy
- Lattice thermal expansion of zircon-type LuPO4 and LuVO4: A comparative study
- Solubility of H2O and CO2 in ultrapotassic melts at 1200 and 1250 °C and pressure from 50 to 500 MPa
- Multi-analytical approach to solve the puzzle of an allanite-subgroup mineral from Kesebol, Västra Götaland, Sweden
- Dislocation modeling in calcium silicate perovskite based on the Peierls-Nabarro model
- Molecular dynamics insight into the cointercalation of hexadecyltrimethyl-ammonium and acetate ions into smectites
- Adding further complexity to the polybasite structure: The role of Ag in the B layer of the -M2a2b2c polytype
- Structural position of H2O molecules and hydrogen bonding in anomalous 11 Å tobermorite
- Electronic structures of siderite (FeCO3) and rhodochrosite (MnCO3): Oxygen K-edge spectroscopy and hybrid density functional theory
- Crystal growth and the fast reaction paradox: Mathematical resolution and implications for habit and compositional zoning
- The composition of KLB-1 peridotite
- Crystal chemistry of the magnetite-ulvöspinel series
- New insights into the crystal structure and crystal chemistry of the zeolite phillipsite
- Letter: Octahedral cation distribution in palygorskite
