Kinetics of solution crystal growth of strengite, FePO4,2H2O

Hans E. Lundager Madsen; Christian Bender Koch

doi:10.1016/j.jcrysgro.2017.10.014

Kinetics of solution crystal growth of strengite, FePO₄,2H₂O

Hans E. Lundager Madsen^*, Christian Bender Koch

^*Corresponding author for this work

Department of Chemistry

5 Citations (Scopus)

Abstract

The iron(III) phosphate strengite, FePO₄,2H₂O, has been precipitated at 25 °C by mixing solutions of iron alum and ammonium phosphate. The rate of crystallization has been determined by pH recording. Three stages of crystal growth kinetics could be distinguished: (1) mononuclear growth, (2) polynuclear growth and, in a few cases, (3) spiral growth (BCF mechanism). From the first two, the value of edge free energy λ = 87 ± 1 pJ/m was found. The identity of the precipitate was verified by SEM, XRD and Mössbauer spectroscopy.

Original language	English
Journal	Journal of Crystal Growth
Volume	482
Pages (from-to)	9-14
Number of pages	6
ISSN	0022-0248
DOIs	https://doi.org/10.1016/j.jcrysgro.2017.10.014
Publication status	Published - 2018

Keywords

A1. Surface processes
A2. Growth from solutions
B1. Iron compounds
B1. Minerals
B1. Phosphates

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10.1016/j.jcrysgro.2017.10.014

Cite this

@article{2e5c0facdb4f4136a14aad1d1bcbce9b,

title = "Kinetics of solution crystal growth of strengite, FePO4,2H2O",

abstract = "The iron(III) phosphate strengite, FePO4,2H2O, has been precipitated at 25 °C by mixing solutions of iron alum and ammonium phosphate. The rate of crystallization has been determined by pH recording. Three stages of crystal growth kinetics could be distinguished: (1) mononuclear growth, (2) polynuclear growth and, in a few cases, (3) spiral growth (BCF mechanism). From the first two, the value of edge free energy λ = 87 ± 1 pJ/m was found. The identity of the precipitate was verified by SEM, XRD and M{\"o}ssbauer spectroscopy.",

keywords = "A1. Surface processes, A2. Growth from solutions, B1. Iron compounds, B1. Minerals, B1. Phosphates",

author = "{Lundager Madsen}, {Hans E.} and Koch, {Christian Bender}",

year = "2018",

doi = "10.1016/j.jcrysgro.2017.10.014",

language = "English",

volume = "482",

pages = "9--14",

journal = "Journal of Crystal Growth",

issn = "0022-0248",

publisher = "Elsevier BV * North-Holland",

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TY - JOUR

T1 - Kinetics of solution crystal growth of strengite, FePO4,2H2O

AU - Lundager Madsen, Hans E.

AU - Koch, Christian Bender

PY - 2018

Y1 - 2018

N2 - The iron(III) phosphate strengite, FePO4,2H2O, has been precipitated at 25 °C by mixing solutions of iron alum and ammonium phosphate. The rate of crystallization has been determined by pH recording. Three stages of crystal growth kinetics could be distinguished: (1) mononuclear growth, (2) polynuclear growth and, in a few cases, (3) spiral growth (BCF mechanism). From the first two, the value of edge free energy λ = 87 ± 1 pJ/m was found. The identity of the precipitate was verified by SEM, XRD and Mössbauer spectroscopy.

AB - The iron(III) phosphate strengite, FePO4,2H2O, has been precipitated at 25 °C by mixing solutions of iron alum and ammonium phosphate. The rate of crystallization has been determined by pH recording. Three stages of crystal growth kinetics could be distinguished: (1) mononuclear growth, (2) polynuclear growth and, in a few cases, (3) spiral growth (BCF mechanism). From the first two, the value of edge free energy λ = 87 ± 1 pJ/m was found. The identity of the precipitate was verified by SEM, XRD and Mössbauer spectroscopy.

KW - A1. Surface processes

KW - A2. Growth from solutions

KW - B1. Iron compounds

KW - B1. Minerals

KW - B1. Phosphates

U2 - 10.1016/j.jcrysgro.2017.10.014

DO - 10.1016/j.jcrysgro.2017.10.014

M3 - Journal article

AN - SCOPUS:85032739270

SN - 0022-0248

VL - 482

SP - 9

EP - 14

JO - Journal of Crystal Growth

JF - Journal of Crystal Growth