Articles you may be interested inVoids and Mn-rich inclusions in a (Ga,Mn)As ferromagnetic semiconductor investigated by transmission electron microscopy The structure of the cryoalloys CO 2 -Kr has been studied in the entire range of relative concentrations by means of transmission electron diffraction. Gaseous samples were deposited from a tank at room temperature onto substrates cooled to 30 K. The filling channel was thermally insulated from the cryogenic screens. An anomalous dependence of the lattice parameter a on the molar content x of krypton in the initial gas mixture was observed; specifically, the function a͑x͒ contains a section which can be regarded as a minimum to within the limits of error. The maximum solubility of the krypton in the carbon dioxide crystal is 38 mol. %, and the solubility of CO 2 in a Kr crystal is low. The experimental data taken together give us a basis for supposing that the phase composition as a function of x has the following regions: 1͒ 0 ഛ x ഛ 0.38-regular solution of Kr in CO 2 ; 0.38ഛ x ഛ 0.6-mixture of a regular solution with critical concentration x cr = 0.38 and nano inclusions of almost pure Kr; 3͒ 0.6ഛ x ഛ 1-mixture of almost pure Kr with nano inclusions of a solution with x cr . A theoretical explanation is given for the anomalous behavior of the function a͑x͒ for x Շ 20 mol. %; the explanation is based on a cluster model and takes account of three mechanisms of interaction of Kr clusters with the crystalline environment of CO 2 . FIG. 1. Electron diffraction patterns of the solid mixtures CO 2 -Kr on a substrate consisting of amorphous carbon at T = 30 K: 2.5 mol. % Kr ͑a͒; 10 mole % Kr ͑b͒; 59 mol. % Kr ͑c͒; 70 mol. % Kr ͑d͒. Low Temp. Phys. 36 ͑3͒, March 2010 Danchuk et al. 255