Unit celt

Figure 8. Bronsted acidity ( ) and Lewis acidity (O) of La zeolites pretreated at 900° C and rehydrated, against cation contents/unit celt. Bronsted aridity (c) and Lewis aridity ( ) of the Na-8.7 zeolite pretreated at 800°C and rehydrated are also plotted...

Numbers of OH Groups per Cavity (4 of Unit Celt), Framework Aluminum Atoms (Al, ), Extra-Framework Aluminum (A/A — -4/gS J, and Aluminum in the Form of Mobile Hydrated Complexes... 

Figure 1. Plan view of the Pt(lll) surface. The anows indicate the location of the four high symmetry sites and the straight Iinesap(3x2) unit celt Qnb two layers of metal atoms are shown for clarity.

Figure 2.5. Retations becween the structure of CeOj and ihal of the C-type scsqutoxtde. The unit celt of CcjO) is obtained by packing the three octants as indicated. The octants are derived from the fluorite stnictuie by ordered elimination of two oxygen per unit cetf...

Figure 2 10. Packing of rnodules used to build Ce70 2 showing the unit celt in projection. Modular sequences along (I00 and 0I0 are. respectively, Dj Di U U and U Dj...

Measure the unit-celt dimensions and X-ray diffraction intensity data for crystals of the native protein. 

Prepare heavy-atom derivatives of the protein with heavy atoms in different positions in the unit celt. Measure an intensity data set for each heavy-atom derivative. 

One might have been tempted to guess that a deviation from a cubical array is a djeparture from iq imom conditions that would demand a more compact array and, hence, a decrease in unit cell volume. However, the experimental results of Table I show that any such deviation in shape results in an immediate increase in unit celt volume. The limiting cases of array shape deviations are Infinitely separated planar arrays or infinitely separated linear arrays which must, of course, have infinite unit cell volumes. Our unit cell volume increases are apparently steps in this direction. 

Figure SJ5 shows a unit celt used commercially Tor electrosynthesis of ozone. A hollow cylindrical fluorocarbon-impregnated carbon anode U used refrigerated...

One layer of a simple cubic lattice, (o) A layer of spheres in which a given sphere (shaded) has four nearest neighbors (lightly shaded spheres) and a coordination number of 4. The square unit cell (solid lines connecting the centers of four spheres) contains one-fourth of each of the four spheres and therefore a total of 1(= 4 X J) sphere. The given sphere is in four different unit cells (numbered), (b) A portion of the space lattice for the layer and a corresponding unit celt Three other unit cells are shown with dashed lines. 

Epsilon Co structure unit celt (similar as P-Mn stniciure)... 

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