... is often reported. Unfortunately, the same indexing of the twin plane, (104), is incorrectly used for both settings; this has led to an incorrect reticular analysis of the twin, which could have been an example of diperiodic twin, an alleged category which has no known examples to date. In this article, we...

... on the sediments of the Po River floodplain near the city of Ferrara (Northern Italy). The recorded signals were dominated by fundamental-mode Rayleigh waves. Several techniques, including multiple-filter analysis, phase velocity stacking, and single-station cross-correlation, were used to obtain group and phase...

... distribution along −2 1 l /1 1 l /12 l and 1 0 l /0 1 l /−1 1 l rows (hexagonal indices), respectively. Some selected crystals were further studied by electron probe micro-analysis (EPMA). Almost all crystals studied belong to the A group. The most common polytype is 3 T , occurring either as the only one...

... l and 10 l /01 l /−11 l rows (hexagonal indices), respectively. Selected crystals were further studied by electron-microprobe analysis (EPMA). Three types of crystals were distinguished: 1) mixed 2 H 1 + 2 H 2 crystals (group D) with the 2 H 1 polytype dominant in most specimens [lattice parameters...

... another and others twinned. The twin law is by reticular merohedry and consists of the well-known 2-fold rotation around [111]. Micro-Raman spectroscopy data revealed that the main inclusions are pyrope and enstatite trapped in the inner part of the individual. No dislocations nucleated from the silicate...

... the end-Permian extinction, facilitated by analysis of thin-sections of 23 limb bones from an ontogenetic sample of ten individuals across the Permo-Triassic boundary. In general, early subadult Moschorhinus displayed propodial cortices with extensive woven- and parallel-fibered bone (PFB) with dense...

... and parallel to (0 3 1) and (031). Electron microprobe analysis gave SiO 2 33.1, TiO 2 0.07, Al 2 O 3 0.03, FeO 49.4, MnO 0.61, MgO 13.4, CaO 2.2, Cr 2 O 3 0.02, V 2 O 3 0.01, NiO 0.05 (sum 99.4 wt%) for the host olivine and SiO 2 33.3, TiO 2 0.03, FeO 31.5, MnO 0.39, MgO 5.4, CaO 28.5, Cr 2 O 3 0.02, NiO 0.05...

... >0 D( L T ) = D( L ind ) reticular pseudo-polyholohedry >1 >0 D( L T ) ≠ 6 D( L ind ) reticular pseudo-merohedry One of [ uvw ] T and ( hkl ) T is the twin element, identified experimentally by, e.g . the diffraction pattern of the twin or by a morphological analysis...

... hybrid twinning reticular merohedry reticular polyholohedry effective twin index concurrent (quasi)-restored sublattices In this article we present a systematic analysis of hybrid twins in silicate minerals, which completes the recent survey on non-silicate minerals ( Nespolo & Ferraris...

... based on the bone deposition rates for each humerus at the time of the animals death (femora did not show LAGs and thus were excluded from this analysis). Due to the need to take billets from different surfaces in the same midshaft plane, the radius measurement of the bone cross-section was used...

...Massimo Nespolo; Yves Moëlo A new twin in staurolite has been recently reported from Coray (Brittany, France). From morphological measurements the twin plane has been identified as (202), which corresponds to twinning by reticular pseudomerohedry with index 3 and obliquity 0.97°. On the basis...

... in the basal plane. Furthermore, prismatic and pyramidal glide planes were identified, with dissociations in pyramidal planes, at this temperature. Also a growth reticular merohedral twin has been observed; the twin law results from a rotation of 180° around the [15̄40] axis. * Corresponding author, e...

..., aimed at completing Friedel's criteria (1904, 1926) of purely reticular nature. Following Hartman's (1956) definition of the twin composition plane, Curien & Kern (1957) and Kern (1961) introduced the notion of Initial Composition Plane (ICP). Depending on whether the ICP coincides...

... analysis ( Wendler & Willems, 2004 ). Therefore, polarization-optical investigations were carried out using untreated specimens embedded in immersion oil and thin sections. Unprocessed sample material (sample 1; F101b +2.0–2.2 m), washed residue, SEM stubs and the polarization-optical slides analysed...

.... The same analysis (details omitted for brevity) on triclinic plagioclases shows a much lower degree of structural restoration, despite a good reticular restoration (twin index 2 and obliquity about 1°), as shown in Section 4. In particular, the oxygen atoms are not restored by the Carlsbad twin operation...

... — — — — — — — — — — 15 — — — — — — Note: A, B, C, D are groups of samples; 16–45 are sample numbers. * Total of brucite and nemalite, its fibrous variety. Fig. 1. Example TDA, TG, and T curves of serpentinite samples from groups A, B, C, D. TDA — thermal differential analysis, TG — thermal...

... . [17] B. M. Moiseev , N. D. Milovidova , and L. I. Fedorov , Izv. AN SSSR, Ser. Neorgan. Materials , vol. 3 , no. 8 , p. 1514 , 1967 . [18] V. P. Ivanova , V. K. Kasatov , T. N. Krasavina , and E. L. Rozinova , Thermal analysis of rocks and minerals...

.... Visual inspection of some crystals from the Les Farges mine, Ussel, Limousin, France (e.g., Brousse 1982 ), show some similar characteristics to those from Puech de Compolibat, indicating {101̄0} twinning may be present. Further analysis is required, however, to confirm this twinning. We thank...

... of dunites temperature electrical resistance activation energy Our paper is devoted to systematic studies of temperature-dependent electrical resistance of dunites serpentinized to different degrees. Details of methods and instruments for the thermal analysis of electrical resistance...

... of the Cañadón Asfalto Formation from the Jurassic of Argentina. Semiquantitative energy-dispersive X-ray spectrometry (EDS) analysis provided elemental composition data that were interpreted using principal component analysis (PCA). The results showed a complex chemical mode of preservation for spinicaudatan...