ChemInform Abstract: A5RE4X[TO4]4Crystal Growth: Fluoride Flux Synthesis of Na5Ln4F[GeO4]4(Ln: Pr, Nd), the First Quaternary Germanate Oxyfluorides.

ChemInform ◽  
2016 ◽  
Vol 47 (31) ◽  
Author(s):  
Allison M. Latshaw ◽  
Branford O. Wilkins ◽  
Gregory Morrison ◽  
Mark D. Smith ◽  
Hans-Conrad zur Loye
Keyword(s):  
CrystEngComm ◽  
2015 ◽  
Vol 17 (25) ◽  
pp. 4654-4661 ◽  
Author(s):  
Allison M. Latshaw ◽  
Branford O. Wilkins ◽  
Kendall D. Hughey ◽  
Jeongho Yeon ◽  
Derek E. Williams ◽  
...  

2016 ◽  
Vol 239 ◽  
pp. 200-203 ◽  
Author(s):  
Allison M. Latshaw ◽  
Branford O. Wilkins ◽  
Gregory Morrison ◽  
Mark D. Smith ◽  
Hans-Conrad zur Loye

2018 ◽  
Vol 735 ◽  
pp. 861-869 ◽  
Author(s):  
Abdenour Achour ◽  
Kan Chen ◽  
Michael J. Reece ◽  
Zhaorong Huang

ChemInform ◽  
2010 ◽  
Vol 41 (11) ◽  
pp. no-no
Author(s):  
Matthias Eul ◽  
Dirk Johrendt ◽  
Rainer Poettgen
Keyword(s):  

2009 ◽  
Vol 44 (1) ◽  
pp. 70-73 ◽  
Author(s):  
Shinobu Hashimoto ◽  
Kentaro Hattori ◽  
Koji Inoue ◽  
Ayuka Nakahashi ◽  
Sawao Honda ◽  
...  
Keyword(s):  

2015 ◽  
Vol 15 (13) ◽  
pp. 7413-7427 ◽  
Author(s):  
G. Wohlfahrt ◽  
C. Amelynck ◽  
C. Ammann ◽  
A. Arneth ◽  
I. Bamberger ◽  
...  

Abstract. Methanol is the second most abundant volatile organic compound in the troposphere and plays a significant role in atmospheric chemistry. While there is consensus about the dominant role of living plants as the major source and the reaction with OH as the major sink of methanol, global methanol budgets diverge considerably in terms of source/sink estimates, reflecting uncertainties in the approaches used to model and the empirical data used to separately constrain these terms. Here we compiled micrometeorological methanol flux data from eight different study sites and reviewed the corresponding literature in order to provide a first cross-site synthesis of the terrestrial ecosystem-scale methanol exchange and present an independent data-driven view of the land–atmosphere methanol exchange. Our study shows that the controls of plant growth on production, and thus the methanol emission magnitude, as well as stomatal conductance on the hourly methanol emission variability, established at the leaf level, hold across sites at the ecosystem level. Unequivocal evidence for bi-directional methanol exchange at the ecosystem scale is presented. Deposition, which at some sites even exceeds methanol emissions, represents an emerging feature of ecosystem-scale measurements and is likely related to environmental factors favouring the formation of surface wetness. Methanol may adsorb to or dissolve in this surface water and eventually be chemically or biologically removed from it. Management activities in agriculture and forestry are shown to increase local methanol emission by orders of magnitude; however, they are neglected at present in global budgets. While contemporary net land methanol budgets are overall consistent with the grand mean of the micrometeorological methanol flux measurements, we caution that the present approach of simulating methanol emission and deposition separately is prone to opposing systematic errors and does not allow for full advantage to be taken of the rich information content of micrometeorological flux measurements.


2014 ◽  
Vol 70 (7) ◽  
pp. i34-i35 ◽  
Author(s):  
Volker Kahlenberg ◽  
Paul Aichholzer

Single crystals of dithulium disilicate, Tm2Si2O7, were obtained in flux synthesis experiments in the system SiO2–Tm2O3–LiF at ambient pressure. The compound belongs to the group of sorosilicates,i.e.it is based on [Si2O7]-units and crystallizes in the thortveitite (Sc2Si2O7) structure type. The Tm3+cation (site symmetry .2.) occupies a distorted octahedral site, with Tm—O bond lengths in the range 2.217 (4)–2.289 (4) Å. Each of the octahedra shares three of its edges with adjacent [TmO6] groups, resulting in the formation of layers parallel to (001). The individual [SiO4] tetrahedra are more regular,i.e.the differences between the bond lengths between Si and the bridging and non-bridging O atoms are not very pronounced. The layers containing the octahedra and the sheets containing the [Si2O7] groups (point group symmetry 2/m) form an alternating sequence. Linkage is provided by sharing common oxygen vertices.


Author(s):  
S A Stepanov ◽  
D T Valiev ◽  
V A Vaganov ◽  
A M Shrayber ◽  
V D Paygin

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