Institute of Experimental Mineralogy Russian Academy of Sciences ------------------------------------------------- 142432, Chernogolovka, Moscow district A.V. Chichagov +7(496)52-22320 *** *** W W W - X R A Y P O L *** *********************** GUPEIITE 4, syn, f-suessite Fe(3)Si Cubic F m3m Z = 4 Fm3m 22 .7 .14 Ref.Str.: Kanematsu K. (1986) * Transactions of the Japan Institute of Metals, 27, 225-232 R: N.A.D. Initial data from BDM-file Lattice parameters (cub. angs.,degr.): a = 5.644 alpha = 90.0 b = 5.644 beta = 90.0 c = 5.644 gamma = 90.0 Unit cell volume (cub. angs.) = 179.79 Molar volume ( cub.cm/mol.) = 27.07 Co-ordinates, thermal parameters, occupation for atomic positions: NoP x/a y/b z/c B(j) atom / occupation 1 0.5 0.5 0.5 0.0 Fe = 1.00 2 0.25 0.25 0.25 0.0 Fe = 1.00 3 0.0 0.0 0.0 0.0 S = 1.00 Co-ordinates for all atomic positions : No NoP x/a y/b z/c 1 1 0.5 0.5 0.5 2 2 0.25 0.25 0.25 3 3 0.0 0.0 0.0 4 2 0.75 0.75 0.75 5 2 0.75 0.25 0.25 6 2 0.75 0.75 0.25 7 2 0.25 0.75 0.25 8 2 0.25 0.75 0.75 9 2 0.25 0.25 0.75 10 2 0.75 0.25 0.75 11 1 0.0 0.5 0.0 12 1 0.0 0.0 0.5 13 1 0.5 0.0 0.0 14 3 0.5 0.0 0.5 15 3 0.5 0.5 0.0 16 3 0.0 0.5 0.5 X-ray density (g/cm cub.) = 7.37 MU (1/cm) = 487.741 Mass attenuation coefficient (cm**2/g) = 66.164 Selected interatomic distances (cation-anion,anion-anion): NoP Atom Rad.sph. C.N. Distance NoP N. (angs.) (angs.) 1 Fe 3.144 6 2.822 3 2.822 3 2.822 3 2.822 3 2.822 3 2.822 3 2 Fe 3.144 4 2.4439 3 2.4439 3 2.4439 3 2.4439 3 3 S 4.368 12 3.9909 3 3.9909 3 3.9909 3 3.9909 3 3.9909 3 3.9909 3 3.9909 3 3.9909 3 3.9909 3 3.9909 3 3.9909 3 3.9909 3 X-ray diffraction powder data (II), X-Ray W.L. = 1.78892(angs.): No H K L Theta 2*Theta S LPG MF F I int. ( degree ) *100 1 1 1 1 15.932 31.864 0.153 23.76 8 36.9 799.7 2 2 0 0 18.479 36.958 0.177 17.2 6 36.4 422.0 3 2 2 0 26.631 53.263 0.251 7.56 12 259.8 18940.9 4 1 1 3 31.71 63.42 0.294 5.11 24 31.2 370.0 5 2 2 2 33.298 66.596 0.307 4.6 8 30.4 105.1 6 4 0 0 39.34 78.68 0.354 3.34 6 214.5 2854.2 7 3 3 1 43.693 87.387 0.386 2.9 24 24.9 133.5 X-ray diffraction powder data (I)...X-Ray wave length = 1.78892 (angs.): No H K L Theta 2*Theta d I int I int.n. I p.h.n. H(Si) ( degree ) (angstrem) *100 *100 1 1 1 1 15.932 31.864 3.25856 799.7 4.2 4.3 5.6 2 2 0 0 18.479 36.958 2.822 422.0 2.2 2.3 5.7 3 2 2 0 26.631 53.263 1.99546 18940.9 100.0 100.0 5.8 4 1 1 3 31.71 63.42 1.70173 370.0 2.0 1.9 5.9 5 4 0 0 39.34 78.68 1.411 2854.2 15.1 14.4 6.0 Reference: Chichagov A.V. et al. Information-Calculating System on Crystal Structure Data of Minerals (MINCRYST) - Kristallographiya, v.35, n.3, 1990, p.610-616 (in Russian) |