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Crystal structure of Na (sub 3) Fe(SO (sub 4) ) (sub 3) ; a high-temperature product ( approximately 400 degrees C) of sideronatrite [Na (sub 2) Fe(SO (sub 4) ) (sub 2) OH.3H (sub 2) O]

Fernando Scordari, Gennaro Ventruti, Alessandro F. Gualtieri and Andrea Lausi
Crystal structure of Na (sub 3) Fe(SO (sub 4) ) (sub 3) ; a high-temperature product ( approximately 400 degrees C) of sideronatrite [Na (sub 2) Fe(SO (sub 4) ) (sub 2) OH.3H (sub 2) O]
American Mineralogist (July 2011) 96 (7): 1107-1111

Abstract

The iron sulfate Na (sub 3) Fe(SO (sub 4) ) (sub 3) studied here has been obtained as a high-temperature (HT) product ( approximately 400 degrees C) from the thermal decomposition of sideronatrite from Sierra Gorda (Chile) having composition Na (sub 2) Fe(SO (sub 4) ) (sub 2) (OH).3H (sub 2) O. The structure determination was carried out using synchrotron X-ray powder diffraction. Structural data refined by the Rietveld method, up to R (sub p) =11.95%, are: space group R3text], lattice parameters a=b=13.6231(1) Aa and c=9.0698(1) Aa, V=1457.76(2) Aa (super 3) , and Z=6. The structure of Na (sub 3) Fe(SO (sub 4) ) (sub 3) can be described in terms of FeO (sub 6) octahedra connected to sulfate tetrahedra by corner-sharing to form infinite chains [Fe(SO (sub 4) ) (sub 3) ] (sub infinity) , running along c. These chains are joined together by Na atoms to build up a three-dimensional network of strong (Fe-O-S) and weak (Na-O) bonds. The topological relationships of Na (sub 3) Fe(SO (sub 4) ) (sub 3) to the structure of some analog minerals are also discussed.


ISSN: 0003-004X
EISSN: 1945-3027
Coden: AMMIAY
Serial Title: American Mineralogist
Serial Volume: 96
Serial Issue: 7
Title: Crystal structure of Na (sub 3) Fe(SO (sub 4) ) (sub 3) ; a high-temperature product ( approximately 400 degrees C) of sideronatrite [Na (sub 2) Fe(SO (sub 4) ) (sub 2) OH.3H (sub 2) O]
Affiliation: Universita di Bari, Dipartimento Geomineralogico, Bari, Italy
Pages: 1107-1111
Published: 201107
Text Language: English
Publisher: Mineralogical Society of America, Washington, DC, United States
References: 17
Accession Number: 2011-062959
Categories: Mineralogy of non-silicates
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 3 tables
S56°00'00" - S17°45'00", W76°00'00" - W67°00'00"
Secondary Affiliation: Universita di Modena e Reggio Emilia, ITA, ItalySincrotrone Trieste, ITA, Italy
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, copyright, Mineralogical Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201135
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