Stabilities of byströmite, MgSb2O6, ordoñezite, ZnSb2O6 and rosiaite, PbSb2O6, and their possible roles in limiting antimony mobility in the supergene zone

Adam J. Roper; Peter Leverett; Timothy D. Murphy; Peter A. Williams

doi:10.1180/minmag.2015.079.3.03

Stabilities of byströmite, MgSb₂O₆, ordoñezite, ZnSb₂O₆ and rosiaite, PbSb₂O₆, and their possible roles in limiting antimony mobility in the supergene zone

Adam J. Roper, Peter Leverett, Timothy D. Murphy, Peter A. Williams

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

18 Citations (Scopus)

Abstract

In order to clarify the roles that secondary minerals may have in determining the extent of dispersion of Sb in the supergene environment, syntheses and stability studies of the Sb(V) oxides byströmite, MgSb₂O₆, ordoñezite, ZnSb₂O₆ and rosiaite, PbSb₂O₆, have been undertaken. Solubilities in aqueous HNO₃ were determined at 298.2 K and the data obtained used to calculate values of ΔG _f ^θ at the same temperature. The derived ΔG _f ^θ(s, 298.2 K) values for MgSb₂O₆ (-1554.1 ±3.6 kJ mol^-1), ZnSb₂O₆ (-1257.0 ±2.6 kJ mol^-1) and PbSb₂O₆ (-1154.2 ±2.6 kJ mol^-1) have been used in subsequent calculations to determine their relative stabilities and relationships with other secondary Sb minerals.

Original language	English
Pages (from-to)	537-544
Number of pages	8
Journal	Mineralogical Magazine
Volume	79
Issue number	3
DOIs	https://doi.org/10.1180/minmag.2015.079.3.03
Publication status	Published - Jun 2015
Externally published	Yes

Keywords

byströmite
ordoñezite
rosiaite
antimony
solubility
mobility
chemical mineralogy
supergene zone

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10.1180/minmag.2015.079.3.03

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@article{a0526ab6bb9b4ee4b38c226941c21f36,

title = "Stabilities of bystr{\"o}mite, MgSb2O6, ordo{\~n}ezite, ZnSb2O6 and rosiaite, PbSb2O6, and their possible roles in limiting antimony mobility in the supergene zone",

abstract = "In order to clarify the roles that secondary minerals may have in determining the extent of dispersion of Sb in the supergene environment, syntheses and stability studies of the Sb(V) oxides bystr{\"o}mite, MgSb2O6, ordo{\~n}ezite, ZnSb2O6 and rosiaite, PbSb2O6, have been undertaken. Solubilities in aqueous HNO3 were determined at 298.2 K and the data obtained used to calculate values of ΔG f θ at the same temperature. The derived ΔG f θ(s, 298.2 K) values for MgSb2O6 (-1554.1 ±3.6 kJ mol-1), ZnSb2O6 (-1257.0 ±2.6 kJ mol-1) and PbSb2O6 (-1154.2 ±2.6 kJ mol-1) have been used in subsequent calculations to determine their relative stabilities and relationships with other secondary Sb minerals.",

keywords = "bystr{\"o}mite, ordo{\~n}ezite, rosiaite, antimony, solubility, mobility, chemical mineralogy, supergene zone",

author = "Roper, \{Adam J.\} and Peter Leverett and Murphy, \{Timothy D.\} and Williams, \{Peter A.\}",

year = "2015",

month = jun,

doi = "10.1180/minmag.2015.079.3.03",

language = "English",

volume = "79",

pages = "537--544",

journal = "Mineralogical Magazine",

issn = "0026-461X",

publisher = "Mineralogical Society",

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TY - JOUR

T1 - Stabilities of byströmite, MgSb2O6, ordoñezite, ZnSb2O6 and rosiaite, PbSb2O6, and their possible roles in limiting antimony mobility in the supergene zone

AU - Roper, Adam J.

AU - Leverett, Peter

AU - Murphy, Timothy D.

AU - Williams, Peter A.

PY - 2015/6

Y1 - 2015/6

N2 - In order to clarify the roles that secondary minerals may have in determining the extent of dispersion of Sb in the supergene environment, syntheses and stability studies of the Sb(V) oxides byströmite, MgSb2O6, ordoñezite, ZnSb2O6 and rosiaite, PbSb2O6, have been undertaken. Solubilities in aqueous HNO3 were determined at 298.2 K and the data obtained used to calculate values of ΔG f θ at the same temperature. The derived ΔG f θ(s, 298.2 K) values for MgSb2O6 (-1554.1 ±3.6 kJ mol-1), ZnSb2O6 (-1257.0 ±2.6 kJ mol-1) and PbSb2O6 (-1154.2 ±2.6 kJ mol-1) have been used in subsequent calculations to determine their relative stabilities and relationships with other secondary Sb minerals.

AB - In order to clarify the roles that secondary minerals may have in determining the extent of dispersion of Sb in the supergene environment, syntheses and stability studies of the Sb(V) oxides byströmite, MgSb2O6, ordoñezite, ZnSb2O6 and rosiaite, PbSb2O6, have been undertaken. Solubilities in aqueous HNO3 were determined at 298.2 K and the data obtained used to calculate values of ΔG f θ at the same temperature. The derived ΔG f θ(s, 298.2 K) values for MgSb2O6 (-1554.1 ±3.6 kJ mol-1), ZnSb2O6 (-1257.0 ±2.6 kJ mol-1) and PbSb2O6 (-1154.2 ±2.6 kJ mol-1) have been used in subsequent calculations to determine their relative stabilities and relationships with other secondary Sb minerals.

KW - byströmite

KW - ordoñezite

KW - rosiaite

KW - antimony

KW - solubility

KW - mobility

KW - chemical mineralogy

KW - supergene zone

UR - https://www.scopus.com/pages/publications/84946036607

U2 - 10.1180/minmag.2015.079.3.03

DO - 10.1180/minmag.2015.079.3.03

M3 - Article

AN - SCOPUS:84946036607

SN - 0026-461X

VL - 79

SP - 537

EP - 544

JO - Mineralogical Magazine

JF - Mineralogical Magazine

IS - 3

ER -

Stabilities of byströmite, MgSb₂O₆, ordoñezite, ZnSb₂O₆ and rosiaite, PbSb₂O₆, and their possible roles in limiting antimony mobility in the supergene zone

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