Improved crystallographic data for graphite

Abstract

Powder diffraction pattern of SP-1 graphite has been obtained using synchrotron X-ray diffraction. Unit cell dimensions were calculated using a least-squares analysis that refined to a ͉⌬2°͉ of no more than 0.007. A hexagonal cell was determined with a space group of P6 3 /mmc ͑194͒, aϭ2.4617͑2͒ and cϭ6.7106 ͑4͒ Å. The Smith/Synder figure of merit is 167 based upon 11 peaks, which indicates that the quality of this data set is superior to the existing PDF card for graphite, 41-1487. It is also emphasized that the interlayer spacing of graphite should be 3.355͑1͒ Å. Using GAS and EXPGUI codes, a new set of calculated powder diffraction data based upon the interlayer spacing of 3.555 Å is generated. A comparison with the current calculated card, 75-1621, has also been made.

Electromagnetic shielding effectiveness of 3D printed polymer composites

“…The XRD pattern depicts typical peaks of the PLA profile [14] and all the characteristic diffraction peaks of graphite, according to the JCPDS card, No. 75-1621 [15,16]. Correspondingly all XRD spectra taken for all studied samples (not shown here) exhibit peaks concerning the carbon structures inclusions (present in our samples) and peaks regarding to the polymeric matrix.…”

Acetylene-sourced CVD-synthesised catalytically active graphene for electrochemical biosensing

“…In the diffraction pattern, we evaluated specific graphene phases by using a reference diffraction pattern contained using the PDF2 software. Four (4) using fixed slit intensity Cu K1 1.54056Å (Fayos, 1999;Howe et al, 2003). The consistency of these four peaks, though with different intensities, in the entire experimental XRD pattern gives the appearance of a fingerprint experimental diffraction pattern for few-layers graphene.…”

Electromagnetic interference shielding behavior of polyaniline/graphite composites prepared by in situ emulsion pathway

“…Figure 5 shows the powder XRD pattern of the doped composites. The pattern shows a sharp peak centered on 2θ value of 26°, which corresponds to the graphite (002 planes),39 and its intensity increases monotonically with increase in the graphite content. Further, this peak shows an initial shift with an increase in graphite content.…”