Thermodynamic properties of mansfieldite (AlAsO4.2H2O), angelellite (Fe-4(AsO4)2O3) and kamarizaite (Fe3(AsO4)2(OH)3.3H2O
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00023272%3A_____%2F18%3A10134523" target="_blank" >RIV/00023272:_____/18:10134523 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11310/18:10397321
Result on the web
<a href="https://www.cambridge.org/core/journals/mineralogical-magazine/article/thermodynamic-properties-of-mansfieldite-alaso42h2o-angelellite-fe4aso42o3-and-kamarizaite-fe3aso42oh33h2o/0AC611975D855B843B2798C79ED89BDA" target="_blank" >https://www.cambridge.org/core/journals/mineralogical-magazine/article/thermodynamic-properties-of-mansfieldite-alaso42h2o-angelellite-fe4aso42o3-and-kamarizaite-fe3aso42oh33h2o/0AC611975D855B843B2798C79ED89BDA</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1180/mgm.2018.107" target="_blank" >10.1180/mgm.2018.107</a>
Alternative languages
Result language
angličtina
Original language name
Thermodynamic properties of mansfieldite (AlAsO4.2H2O), angelellite (Fe-4(AsO4)2O3) and kamarizaite (Fe3(AsO4)2(OH)3.3H2O
Original language description
Thermodynamic data for the arsenates of various metals are necessary to calculate their solubilities and to evaluate their potential as arsenic storage media. If some of the less common arsenate minerals have been shown to be less soluble than the currently used options for arsenic disposal (especially scorodite and arsenical iron oxides), they should be further investigated as promising storage media. Furthermore, the health risk associated with arsenic minerals is a function of their solubility and bioavailability, not merely their presence. For all these purposes, solubilities of such minerals need to be known. In this work, a complete set of thennodynamic data has been determined for mansfieldite, AlAsO4.2H(2)O; angelellite. Fe4(AsO4)2O3; and kamarizaite, Fe3(AsO4)(OH)3.3H2O, using a combination of high-temperature oxide-melt calorimetry, relaxation calorimetry, solubility measurements, and estimates where possible and appropriate. Available, but limited, chemical data for the natural scorodite-mansfieldite solid-solution series hint at a miscibility gap; hence the non-ideal nature of the series. However, no mixing parameters were derived because more data are needed. The solubility of mansfieldite is several orders of magnitude higher than that of scorodite. The solubility of kamarizaite, on the other hand, is comparable to that of scorodite, and kamarizaite even has a small stability field in a pH-pc diagram. It is predicted to form under mildly acidic conditions in acid drainage systems that are not subject to rapid neutralization and sudden strong supersaturation. The solubility of angelellite is high, and the mineral is obviously restricted to unusual environments, such as fumaroles.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10504 - Mineralogy
Result continuities
Project
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Continuities
V - Vyzkumna aktivita podporovana z jinych verejnych zdroju
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Mineralogical Magazine
ISSN
0026-461X
e-ISSN
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Volume of the periodical
82
Issue of the periodical within the volume
6
Country of publishing house
GB - UNITED KINGDOM
Number of pages
22
Pages from-to
1333-1354
UT code for WoS article
000456950000009
EID of the result in the Scopus database
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