Determination of the Formation Energy of Vacancies in Lithium Fluoride and Potassium Chloride by Quenching

1969 ◽  
Vol 51 (11) ◽  
pp. 5190-5191 ◽  
Author(s):  
G. Pellegrini ◽  
J. Pelsmaekers
Keyword(s):  
Potassium Chloride ◽  
Lithium Fluoride ◽  
Formation Energy

A new determination of h /√( em 0 ) by electron diffraction

1952 ◽  
Vol 215 (1123) ◽  
pp. 550-564 ◽  
Keyword(s):  
Sodium Chloride ◽  
Electron Diffraction ◽  
Potassium Chloride ◽  
Lithium Fluoride ◽  
Wave Length ◽  
Alkali Halides ◽  
Mean Value ◽  
Diffraction Patterns

The wave-length of electrons of energy 40 to 60 keV has been determined from the diffraction patterns of transmission specimens of alkali halides and metals. The accelerating potential was measured by a special potentiometer and hence the quantity h /√( em 0 ) was derived. The results using specimens of sodium chloride, potassium chloride, caesium iodide and aluminium were mutually consistent and their mean value was h /√( em 0 ) = (1*00156 ± 0.00010) x 10 -8 ( e in e. s. u.). Specimens of gold and lithium fluoride gave anomalous results.

scholarly journals Analysis of operating variables for Yerba mate leaves supercritical carbon dioxide extraction

2018 ◽  
Vol 24 (3) ◽  
pp. 231-238 ◽  
Author(s):  
Branislava Teofilovic ◽  
Nevena Grujic-Letic ◽  
Strahinja Kovacevic ◽  
Sanja Podunavac-Kuzmanovic ◽  
Slobodan Gadzuric
Keyword(s):  
Potassium Chloride ◽  
Current Source ◽  
Economic Feasibility ◽  
Superior Performance ◽  
Yerba Mate ◽  
Operating Variables ◽  
Carbon Dioxide Extraction ◽  
Increasing Demand ◽  
Positive Results

Given the increasing demand for potassium in Brazil, the mining and use of carnallite is becoming increasingly important, because the current source of potassium, sylvinite, is being depleted and there is a risk of shortages. Based on theoretical and practical data available in existing literature, this work describes the development, simulation, and economic feasibility of a process for dissolution and crystallization of potassium chloride from carnallite ore. Positive results were obtained following the application of the Hoffman diagram and determination of the corresponding equation. The proposed process provided over 85% potassium chloride crystallization, demonstrating its superior performance, compared to existing procedures.

Gas Chromatographic Determination of Residues of Organophosphorus Pesticides with a Modified Flame Ionization Detector

1967 ◽  
Vol 50 (3) ◽  
pp. 601-604
Author(s):  
Joseph H Ford ◽  
Morton Beroza
Keyword(s):  
Potassium Chloride ◽  
Organophosphorus Pesticides ◽  
Chromatographic Determination ◽  
Ionization Detector ◽  
Carrier Gas ◽  
Flame Ionization ◽  
Phosphorus Containing ◽  
Carrier Gases ◽  
Chloride Coating

Abstract The effect of various salt coatings, metals, and carrier gases was investigated in an attempt to improve the Giuffrida thermionic detector for residues of phosphorus-containing pesticides. As reported recently hy Giuffrida et al., the highest sensitivity to phosphorus (with insignificant response to halogen) was obtained with a potassium chloride coating. The use of helium as the carrier gas produced an 8-fold enhancement in response to phosphorus over that obtained with nitrogen, and the response to halogen remained nil. Substrate interference was very low with the KCI detector and helium carrier gas, and analyses were possible at the subnanogram level

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