Polymorphic change from vaterite to aragonite under influence of sulfate: The "morning star" habit

R. M. Wagterveld; M. Yu; H. Miedema; G. J. Witkamp

doi:10.1016/j.jcrysgro.2013.10.044

Polymorphic change from vaterite to aragonite under influence of sulfate: The "morning star" habit

R. M. Wagterveld^*, M. Yu, H. Miedema, G. J. Witkamp

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

The presence of sulfate in reverse osmosis drinking water concentrate and its effect on calcium carbonate precipitation was studied, notably the overall kinetics of CaCO₃ formation and the types of polymorphs formed. CaCO₃ formation slows down with increasing sulfate concentration and the preferential polymorph shifts from vaterite to aragonite with increasing sulfate concentration. With this polymorphic change, a new combined habit is observed where aragonite spikes grow on top of vaterite ("morning star" habit). The presence of a moderate magnesium concentration results in the shift of vaterite to aragonite at relatively low sulfate concentrations; where sulfate and magnesium appear to have an additive effect. Without magnesium, spikes on top of vaterite were also observed, but only at relatively high sulfate concentration. Without the presence of magnesium, single crystals of aragonite were not found.

Original language	English (US)
Pages (from-to)	29-35
Number of pages	7
Journal	Journal of Crystal Growth
Volume	387
DOIs	https://doi.org/10.1016/j.jcrysgro.2013.10.044
State	Published - 2014
Externally published	Yes

Keywords

A2. Growth from solutions
B1. Aragonite
B1. Calcium carbonate
B1. Sulfate
B1. Vaterite

ASJC Scopus subject areas

Condensed Matter Physics
Inorganic Chemistry
Materials Chemistry

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10.1016/j.jcrysgro.2013.10.044

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title = "Polymorphic change from vaterite to aragonite under influence of sulfate: The {"}morning star{"} habit",

abstract = "The presence of sulfate in reverse osmosis drinking water concentrate and its effect on calcium carbonate precipitation was studied, notably the overall kinetics of CaCO3 formation and the types of polymorphs formed. CaCO3 formation slows down with increasing sulfate concentration and the preferential polymorph shifts from vaterite to aragonite with increasing sulfate concentration. With this polymorphic change, a new combined habit is observed where aragonite spikes grow on top of vaterite ({"}morning star{"} habit). The presence of a moderate magnesium concentration results in the shift of vaterite to aragonite at relatively low sulfate concentrations; where sulfate and magnesium appear to have an additive effect. Without magnesium, spikes on top of vaterite were also observed, but only at relatively high sulfate concentration. Without the presence of magnesium, single crystals of aragonite were not found.",

keywords = "A2. Growth from solutions, B1. Aragonite, B1. Calcium carbonate, B1. Sulfate, B1. Vaterite",

author = "Wagterveld, {R. M.} and M. Yu and H. Miedema and Witkamp, {G. J.}",

year = "2014",

doi = "10.1016/j.jcrysgro.2013.10.044",

language = "English (US)",

volume = "387",

pages = "29--35",

journal = "Journal of Crystal Growth",

issn = "0022-0248",

publisher = "Elsevier B.V.",

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T1 - Polymorphic change from vaterite to aragonite under influence of sulfate

T2 - The "morning star" habit

AU - Wagterveld, R. M.

AU - Yu, M.

AU - Miedema, H.

AU - Witkamp, G. J.

PY - 2014

Y1 - 2014

N2 - The presence of sulfate in reverse osmosis drinking water concentrate and its effect on calcium carbonate precipitation was studied, notably the overall kinetics of CaCO3 formation and the types of polymorphs formed. CaCO3 formation slows down with increasing sulfate concentration and the preferential polymorph shifts from vaterite to aragonite with increasing sulfate concentration. With this polymorphic change, a new combined habit is observed where aragonite spikes grow on top of vaterite ("morning star" habit). The presence of a moderate magnesium concentration results in the shift of vaterite to aragonite at relatively low sulfate concentrations; where sulfate and magnesium appear to have an additive effect. Without magnesium, spikes on top of vaterite were also observed, but only at relatively high sulfate concentration. Without the presence of magnesium, single crystals of aragonite were not found.

AB - The presence of sulfate in reverse osmosis drinking water concentrate and its effect on calcium carbonate precipitation was studied, notably the overall kinetics of CaCO3 formation and the types of polymorphs formed. CaCO3 formation slows down with increasing sulfate concentration and the preferential polymorph shifts from vaterite to aragonite with increasing sulfate concentration. With this polymorphic change, a new combined habit is observed where aragonite spikes grow on top of vaterite ("morning star" habit). The presence of a moderate magnesium concentration results in the shift of vaterite to aragonite at relatively low sulfate concentrations; where sulfate and magnesium appear to have an additive effect. Without magnesium, spikes on top of vaterite were also observed, but only at relatively high sulfate concentration. Without the presence of magnesium, single crystals of aragonite were not found.

KW - A2. Growth from solutions

KW - B1. Aragonite

KW - B1. Calcium carbonate

KW - B1. Sulfate

KW - B1. Vaterite

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DO - 10.1016/j.jcrysgro.2013.10.044

M3 - Article

AN - SCOPUS:84887843334

SN - 0022-0248

VL - 387

SP - 29

EP - 35

JO - Journal of Crystal Growth

JF - Journal of Crystal Growth

ER -

Polymorphic change from vaterite to aragonite under influence of sulfate: The "morning star" habit

Abstract

Keywords

ASJC Scopus subject areas

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