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Silver behenate

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Title: Silver behenate  
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Subject: Rubidium silver iodide, Potassium argentocyanide, Silver permanganate, Silver(I,III) oxide, Silver nitride
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Silver behenate

Silver behenate
IUPAC name
Silver(I) docosanoate
Other names
Silver docosanoate; Behenic acid silver salt
Jmol-3D images Image
Molar mass 447.2287 g/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Silver behenate is a silver salt of the long-chain fatty acid behenic acid. It is a possible low-angle diffraction standard that was characterized using the powder diffraction technique. Diffraction patterns obtained with 1.54 Å synchrotron and Cu Ka radiations showed thirteen reflections in the range 1.5-20.0 ° 2-theta.


With the National Institute of Standards and Technology's standard reference material silicon as an internal standard, the long spacing of silver behenate was accurately determined from the profile-fitted synchrotron diffraction peaks, with d001 = 58.380 (3) Å (5.8380(3) nm). This result was in agreement with that obtained from the Cu Ka pattern. The profile widths of the silver behenate peaks were found to be consistently larger than those of the silicon peaks, indicating significant line broadening for silver behenate. The average crystallite size along the long-spacing direction of silver behenate was estimated using the Scherrer equation, giving D(avg) = 900 (50) Å (85–95 nm).

Because silver behenate has a large number of well defined diffraction peaks in the 1.5-20.0° 2-theta range, it is suitable for use as an angle-calibration standard for low-angle diffraction. However, care must be taken if silver behenate is to be used as a peak-profile calibration standard because of line broadening.


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