Thermodynamics, crystal chemistry and structural complexity of the Fe(SO4)(OH)(H2O)x phases: Fe(SO4)(OH), metahohmannite, butlerite, parabutlerite, amarantite, hohmannite, and fibroferrite

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00023272%3A_____%2F18%3A10134316" target="_blank" >RIV/00023272:_____/18:10134316 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/18:00497031

Výsledek na webu

<a href="http://dx.doi.org/10.1127/ejm/2017/0029-2677" target="_blank" >http://dx.doi.org/10.1127/ejm/2017/0029-2677</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1127/ejm/2017/0029-2677" target="_blank" >10.1127/ejm/2017/0029-2677</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Thermodynamics, crystal chemistry and structural complexity of the Fe(SO4)(OH)(H2O)x phases: Fe(SO4)(OH), metahohmannite, butlerite, parabutlerite, amarantite, hohmannite, and fibroferrite

Popis výsledku v původním jazyce

Using combination of acid-solution, high-temperature oxide-melt, relaxation, and differential scanning calorimetry, we have determined the thermodynamic properties of all phases in the system Fe(SO4)(OH)-H2O. Using these data, phase diagrams for low-temperature (25 degrees C) systems in contact with aqueous solutions predict that these phases should precipitate from extremely concentrated, low-pH solutions. In a relative humidity-temperature space, only Fe(SO4)(OH), parabutlerite, and amarantite have stability fields; the higher hydrates would require unrealistically high air humidities to form as stable phases. High-temperature high-pressure phase diagrams produce reasonable topologies, although the details of the phase relations between Fe(SO4)(OH), Fe-2(SO4)(3), and hydronium jarosite deserve more work. We also present a new structural model for amarantite, including the positions of the H atoms, and an analysis of the hydrogen bonding network in this mineral. Using the concept of information density in minerals, the Fe(SO4)(OH)(H2O)(x) phases were analyzed. This analysis lends some validity to the premise that more complex structures are also the more stable ones, but other systems should be investigated to test these trends.

Název v anglickém jazyce

Thermodynamics, crystal chemistry and structural complexity of the Fe(SO4)(OH)(H2O)x phases: Fe(SO4)(OH), metahohmannite, butlerite, parabutlerite, amarantite, hohmannite, and fibroferrite

Popis výsledku anglicky

Using combination of acid-solution, high-temperature oxide-melt, relaxation, and differential scanning calorimetry, we have determined the thermodynamic properties of all phases in the system Fe(SO4)(OH)-H2O. Using these data, phase diagrams for low-temperature (25 degrees C) systems in contact with aqueous solutions predict that these phases should precipitate from extremely concentrated, low-pH solutions. In a relative humidity-temperature space, only Fe(SO4)(OH), parabutlerite, and amarantite have stability fields; the higher hydrates would require unrealistically high air humidities to form as stable phases. High-temperature high-pressure phase diagrams produce reasonable topologies, although the details of the phase relations between Fe(SO4)(OH), Fe-2(SO4)(3), and hydronium jarosite deserve more work. We also present a new structural model for amarantite, including the positions of the H atoms, and an analysis of the hydrogen bonding network in this mineral. Using the concept of information density in minerals, the Fe(SO4)(OH)(H2O)(x) phases were analyzed. This analysis lends some validity to the premise that more complex structures are also the more stable ones, but other systems should be investigated to test these trends.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10504 - Mineralogy

Projekt

<a href="/cs/project/GA17-09161S" target="_blank" >GA17-09161S: Krystalové struktury, chemismus a stabilita arseničnanových a síranových minerálů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

European Journal of Mineralogy

ISSN

0935-1221

e-ISSN

—

Svazek periodika

30

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

17

Strana od-do

259-275

Kód UT WoS článku

000444631000008

EID výsledku v databázi Scopus

—