Iron redox reactions in the tourmaline structure:
High-temperature treatment of Fe3+-rich schorl

J 2012

Iron redox reactions in the tourmaline structure: High-temperature treatment of Fe3+-rich schorl

FILIP, Jan; Ferdinando BOSI; Milan NOVÁK; Henrik SKOGBY; Jiří TUČEK et. al.

Základní údaje

Originální název

Iron redox reactions in the tourmaline structure: High-temperature treatment of Fe3+-rich schorl

Autoři

FILIP, Jan (203 Česká republika, garant); Ferdinando BOSI (380 Itálie); Milan NOVÁK (203 Česká republika, domácí); Henrik SKOGBY (752 Švédsko); Jiří TUČEK (203 Česká republika); Jan ČUDA (203 Česká republika) a Manfred WILDNER (40 Rakousko)

Vydání

Geochimica et Cosmochimica Acta, 2012, 0016-7037

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

Geochemie

Stát vydavatele

Velká Británie a Severní Irsko

Utajení

není předmětem státního či obchodního tajemství

Impakt faktor

Impact factor: 3.884

Kód RIV

RIV/00216224:14310/12:00058621

Organizační jednotka

Přírodovědecká fakulta

DOI

http://dx.doi.org/10.1016/j.gca.2012.02.031

UT WoS

000303677400016

Klíčová slova anglicky

crystal-structure; heat-treatment; ferric-iron; chemical-composition; site occupancies; dravite series; Mn-tourmaline; chemistry; Mössbauer; Fe

Štítky

AKR, rivok

Změněno: 4. 4. 2013 10:58, Ing. Andrea Mikešková

Anotace

V originále

We present a detailed study of thermally-driven oxidation and reduction of Fe in the structure of schorl (as the most widespread tourmaline), Fe2+-bearing olenite and fluor-schorl. The principal Fe3+-rich tourmaline investigated in this study is a natural schorl sample from a unique occurrence in peralkaline rocks near Cancrinite Hill, east of Bancroft, southern Ontario. Tourmaline samples were thermally-treated in air and hydrogen at temperatures of 700, 800 and 900 C to oxidize or reduce the structural Fe. High-temperature changes were continuously monitored using 57Fe Mössbauer and infrared spectroscopy. Proportions of Fe2+ and Fe3+ vary as a function of the heat treatment. An increase in Fe3+ up to 100% after heating in air at 700 C was observed, whereas only small changes in the Fe3+/Fetot ratio after heating under hydrogen at 700 C was revealed. Partial deprotonation/protonation represents charge compensation for the oxidation/reduction of Fe at the Y and Z sites.

Návaznosti

GAP210/10/0743, projekt VaV

Název: Chemické složení a stupeň strukturního uspořádání přírodních turmalínů - geochemické versus strukturní faktory

Investor: Grantová agentura ČR, Chemické složení a stupeň strukturního uspořádání přírodních turmalínů - geochemické versus strukturní faktory

Citovat

FILIP, Jan; Ferdinando BOSI; Milan NOVÁK; Henrik SKOGBY; Jiří TUČEK; Jan ČUDA a Manfred WILDNER. Iron redox reactions in the tourmaline structure: High-temperature treatment of Fe3+-rich schorl. Geochimica et Cosmochimica Acta. 2012, roč. 86, JUN, s. 239-256. ISSN 0016-7037. Dostupné z: https://dx.doi.org/10.1016/j.gca.2012.02.031.

@article{1092212,
   author = {Filip, Jan and Bosi, Ferdinando and Novák, Milan and Skogby, Henrik and Tuček, Jiří and Čuda, Jan and Wildner, Manfred},
   article_number = {JUN},
   doi = {http://dx.doi.org/10.1016/j.gca.2012.02.031},
   keywords = {crystal-structure; heat-treatment; ferric-iron; chemical-composition; site occupancies; dravite series; Mn-tourmaline; chemistry; Mössbauer; Fe},
   language = {eng},
   issn = {0016-7037},
   journal = {Geochimica et Cosmochimica Acta},
   title = {Iron redox reactions in the tourmaline structure: High-temperature treatment of Fe3+-rich schorl},
   volume = {86},
   year = {2012}
}

TY  - JOUR
ID  - 1092212
AU  - Filip, Jan - Bosi, Ferdinando - Novák, Milan - Skogby, Henrik - Tuček, Jiří - Čuda, Jan - Wildner, Manfred
PY  - 2012
TI  - Iron redox reactions in the tourmaline structure: High-temperature treatment of Fe3+-rich schorl
JF  - Geochimica et Cosmochimica Acta
VL  - 86
IS  - JUN
SP  - 239-256
EP  - 239-256
SN  - 00167037
KW  - crystal-structure
KW  - heat-treatment
KW  - ferric-iron
KW  - chemical-composition
KW  - site occupancies
KW  - dravite series
KW  - Mn-tourmaline
KW  - chemistry
KW  - Mössbauer
KW  - Fe
N2  - We present a detailed study of thermally-driven oxidation and reduction of Fe in the structure of schorl (as the most widespread tourmaline), Fe2+-bearing olenite and fluor-schorl. The principal Fe3+-rich tourmaline investigated in this study is a natural schorl sample from a unique occurrence in peralkaline rocks near Cancrinite Hill, east of Bancroft, southern Ontario. Tourmaline samples were thermally-treated in air and hydrogen at temperatures of 700, 800 and 900 C to oxidize or reduce the structural Fe. High-temperature changes were continuously monitored using 57Fe Mössbauer and infrared spectroscopy. Proportions of Fe2+ and Fe3+ vary as a function of the heat treatment. An increase in Fe3+ up to 100% after heating in air at 700 C was observed, whereas only small changes in the Fe3+/Fetot ratio after heating under hydrogen at 700 C was revealed. Partial deprotonation/protonation represents charge compensation for the oxidation/reduction of Fe at the Y and Z sites.
ER  -

FILIP, Jan; Ferdinando BOSI; Milan NOVÁK; Henrik SKOGBY; Jiří TUČEK; Jan ČUDA a Manfred WILDNER. Iron redox reactions in the tourmaline structure: High-temperature treatment of Fe3+-rich schorl. \textit{Geochimica et Cosmochimica Acta}. 2012, roč.~86, JUN, s.~239-256. ISSN~0016-7037. Dostupné z: https://dx.doi.org/10.1016/j.gca.2012.02.031.

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