Two studies examined intimacy in adolescent friendships. In the first, 7th-, 9th-, and 11th-grade students completed a questionnaire assessing perceived friendship intimacy. Age and sex differences were identified in emotional closeness, self-disclosure, emphasis on individuality, control, and conformity. Across ages, emphasis on individuality increased, whereas control and conformity declined. There were no age differences in emotional closeness and self-disclosure. Females reported more emotional closeness and self-disclosure than males. In the second study, individual differences in friendship intimacy were examined in a sample of 9th-grade adolescents. A joint problem solving task identified interdependent and disengaged friends. Perceived intimacy among interdependent and disengaged friends was contrasted with that in a control group of subjects without friends. Adolescents with friends reported more closeness than those without friends. Interdependent friends reported greater levels of respect for individuality than disengaged friends. The results underscore the salience of intimacy for peer relationships during the adolescent years and suggest that intimacy may be an important construct distinguishing between different types of close friendships.

Thin films of a new iron oxide phase, β‐Fe2O3 , were prepared by chemical vapor deposition (CVD) from tris(trifluoroacetylacetonato) iron (III) at 300°C in the presence of oxygen onto a variety of substrates. The films were characterized by x‐ray diffraction analysis, scanning electron microscopy, and Mössbauer spectroscopy. For the latter measurements the films were prepared from enriched 57Fe2O3 . The ultraviolet, visible, and infrared spectra of the films were also recorded. The iron (III) oxide phase prepared was bcc having the bixbyite structure, Ia3 space group and the lattice constant a0=9.393Å . There are 16 formula molecules to the unit cell and the two iron atoms occupy two nonequivalent distorted octahedral lattice sites: 3̅ (8b); 2(24d).

A method for quantitative determination of local curvature in elastically bent perfect crystals is described. The method is based on X-ray intensity measurements, and a comparison of experimentally determined values with those derived from diffraction theory gives satisfactory agreement. The method was applied to determine the strain gradient and strain concentration in the vicinity of the notch of an elastically bent crystal. The experimental results were compared with those derived from a similar model based on continuum mechanics. Possible applications of the X-ray method are discussed to obtain experimental solutions to strain analyses which, when approached by continuum mechanics, pose formidable mathematical obstacles.

fl-Fe203, body centred cubic, la3, a0=9"393 (2) A, Z= 16, D~,= 5"14 g cm -a. In the 24(d) and 8(b) symmetry positions the Fe 3+ ions are octahedrally coordinated, the former being more distorted than the latter.

Inherent deformations of ZnS polytype regions are determined by measuring angles between linear markings. The deformations are correlated to the crystallographic structures of the polytypes as well. The relations clearly indicate that polytype formation occurred by a periodic slip process after crystal growth had been completed. Further observations substantiating this model are quoted.