Dear all I am sorry for disturbing you all again, since I am self learning to fit multiple scattering for biogenic Mn oxides in Artemis, I am quite lost in understanding the basics of Mn Mn corner sharing path. All reports are included Mn-Mn Corner at ~ 3.4 A, which I cannot find in my Feff calcuation for Phyllomanganate layer (Na-Birnessite) model. Below are the crystallographic information of Na birnessite I used (*also available in the attachment*), Na is excluded. A = 5.174 B = 2.850 C = 7.336 and angles 90, 103.18 and 90 for alpha, beta, gamma respectively Parameters X Y Z Mn 0 0 0 O1 0.37600 0 0.1330 I have two questions 1) How to identify the Mn Mn corner paths from the Paths result. 2) Where can I find the Coordination Number for Mn Mn Corner, If i see in eg. Webb et al., 2005 ( http://www.intl-ammin.geoscienceworld.org/content/90/8-9/1342.short) the CN numbers for Mn-Mn Corner is 0.6(1.0) or 0.8(8), what does the number represent in the brackets? It will be looking forward for your help. Regards -- Sathish