... Society of America 2025 Pyroxene crystal habit crystal size distribution nanolite magma ascent Magma ascent histories in volcanic conduits are important for understanding the evolution of eruptive activities ( Cashman and Sparks 2013 ; Cassidy et al. 2018 ). The ascent histories can...

... liquids of metallic alloys ( Hu and Tanaka 2022 ) and micro/nanoparticles with atypical habits under high supersaturation ( Li et al. 2013 ). Instead, laboratory and field observations have revealed the attachment of particles with sizes ranging from multi-ion complexes to fully formed nanoparticles ( Lee...

.... Finescreekite crystals on holotype specimen #76227. The field of view is 3 mm across. The name hayelasdiite (/haɪ:ˈjeɪ:ˈlɑːz:ˈdi: ait/) is based on the Cherokee word hayelasdi (ᎭᏰᎳᏍᏗ in the Tsalagi language) meaning short blade or knife, in reference to the blade-like habit of the mineral. The Cherokee...

... bundles of micron-scale crystallite fibers across the external and internal surfaces of the bubble-form. This transition from biotic-mediated nano-crystallites to abiotic needle-form crystal habits was controlled by metallic ion adsorption. Strontium adsorption perpetuated acicular needle form...

..., the initial green color of the crystal is retained, but at 925 K ( Fig. 3 ), it turns reddish; the crystal shape is preserved. At 975 K ( Fig. 3c ), the crystal facets are clearly visible. At 1000 K, the crystal habit is retained, but the facets look somewhat smeared ( Fig. 3d ); at 1025 K ( Fig. 3e ), a drop...

... distributions (CSDs). Here, we focused on the crystal habit, especially the shape variation due to the combination of ( hk 0) faces (hereafter “tracht”) of pyroxene microlites and nano-crystals, and measured CSDs for each crystal habit (tracht) to more comprehensively characterize the crystallization kinetics...

... distributions of adjacent grain pairs are in accord with a theoretical distribution of random olivine aggregate. Moreover, the calculation of the FF angles for adjacent grain pairs with low Miller index GBPs reproduces measured angle values based on the olivine crystal habit. Therefore, our study suggests...

...Bryan C. Chakoumakos; Brenda M. Pracheil Abstract Vaterite occurring in fish otoliths exhibits plumose and spherulitic habits, the latter being like those grown from aqueous solutions. Vaterite spherulites are known to have sheaf-like texture and can be up to 100 μm in size. In thin section...

... from Venezuela digested in H 2 O; (d) textures and crystal habits of aluminum phosphate and an unidentified fibrous mineral (chemically similar to sveite, but lacking K); (e) the silicate mineral residue of sveite sample “31-9-18-4” digested in H 2 O; and (f) the silicate mineral residue of sveite...

... are euhedral orthopyroxene inclusions (5–20 µm diameter) that exhibit octahedral habits ( Figs. 5a – 5c ). Other small subhedral to euhedral inclusions (5–15 µm) with triangular forms are mainly clinopyroxene ( Figs. 5d – 5f ). Most of the subhedral inclusions show octahedral morphologies ( Fig. 5...