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Title: C hlorobaculum tepidum growth on biogenic S(0) as the sole photosynthetic electron donor: Cba. tepidum  S(0) growth
Award ID(s):
1244373
NSF-PAR ID:
10040431
Author(s) / Creator(s):
; ; ; ; ;
Date Published:
Journal Name:
Environmental Microbiology
Volume:
18
Issue:
9
ISSN:
1462-2912
Page Range / eLocation ID:
2856 to 2867
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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  1. Abstract

    A series of copper thiospinel compounds, CuCo2S4‐xSex(x = 0, 0.2, 0.4, 0.6, 0.8), have been successfully synthesized by solid‐state reaction and their structure and magnetic properties have been studied. The Rietveld refinements of X‐ray diffractions indicate that both the lattice constants and the nearest‐neighbor Cu‐Cu distances increase with increasing selenium doping. A weakly antiferromagnetic transition occurring at about 4 K is observed in CuCo2S4. Two antiferromagnetic transitions at about 3.5 K and 6 K are observed in selenium‐doped samples, which suggest that the exchange couplings associated with Cu‐S(Se)‐Cu and Cu‐Se(S)‐Cu, respectively, are responsible for the two antiferromagnetic transitions. Detailed analysis of the experimental results further indicates that the nearest‐neighbor molecular field coefficient is comparable to the next‐neighbor molecular field coefficient. We propose a reasonable model to explain this phenomenon.

     
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