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Ternary Zintl arsenides Eu21Mn4As18, Eu21Zn4As18, and quaternary solid solution Eu21Mn4As15.4Sb2.6have been synthesized and structurally characterized using single‐crystal X‐ray diffraction. Eu21Mn4As18and Eu21Mn4As15.4Sb2.6are reported here for the first time, whereas new structural insights are presented for the previously known Eu21Zn4As18. All title compounds crystallize in the Sr21Mn4Sb18structure type (space groupC2/m) and exhibit pronounced positional disorder affecting both cationic and anionic sites. This includes disorder on Eu atoms and As2dimers, as well as splitM(M = Mn, Zn) sites within the anionic [M8As22]48−clusters. Despite the disorder, the Zintl concept remains applicable to the novel Eu21Mn4As18phase, and the charge‐balanced composition can be expressed as 2 × Eu21Mn4As18= [Eu2+]42{[Mn8As22]48‐}{[As2]4‐}3[As3‐]8. Electronic structure calculations performed on the disorder‐free model of Eu21Zn4As18predict a bandgap of ≈1.1 eV.
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Modeling estimates of agricultural and natural soil nitrous oxide emissions across the contiguous United States: Annual time-series gridded database during 1900-2019
This dataset includes the time-series maps of the model-estimated N2</sub>O emissions, covering the lower U.S. spanning from 1900 to 2019.
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- PAR ID:
- 10336602
- Publisher / Repository:
- figshare
- Date Published:
- Subject(s) / Keyword(s):
- Environmental Science
- Format(s):
- Medium: X Size: 134650813 Bytes
- Size(s):
- 134650813 Bytes
- Sponsoring Org:
- National Science Foundation
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