Cs<sub>4</sub>Ca[Si<sub>8</sub>O<sub>19</sub>]: a new mixed tetrahedral-octahedral oxosilicate, its topological features and comparison with other interrupted framework silicates. [PDF]
Acta Crystallogr B Struct Sci Cryst Eng MaterThe crystal structure of the mixed tetrahedral–octahedral framework silicate Cs4Ca[Si8O19] has been solved. A topological analysis of the present compound and other interrupted framework silicates is presented.Single crystals of a previously unknown caesium calcium silicate with the composition Ca4Ca[Si8O19] have been obtained during a systematic study
Kahlenberg V.
europepmc +2 more sources
SPITZER survey of dust grain processing in stable discs around binary post-AGB stars [PDF]
, 2008 Aims: We investigate the mineralogy and dust processing in the circumbinary discs of binary post-AGB stars using high-resolution TIMMI2 and SPITZER infrared spectra.
Acke +86 more
core +20 more sources
Aerosol Measurements and Decadal Changes: The Role of Climatic Changes and How It Reflects in Respiratory Allergies and Asthma. [PDF]
AllergyABSTRACT The causative agents of respiratory allergies are bioaerosols, such as house dust mite feces, pollen grains, and fungal spores. Climate change and urbanization are considered to lead to an increase in the load of allergenic bioaerosols due to impacts on plant phenophases and allergenicity. Continuous and efficient monitoring of the atmospheric
Kazadzis S +18 more
europepmc +2 more sources
Geophysical Monograph Series, Page 263-304., 2021 Exploring the links between Large Igneous Provinces and dramatic environmental impact
An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Jessica H. Whiteside +3 more
wiley +2 more sources
Lethaia, EarlyView., 2021 Biomineralization is a generic term used to indicate biological‐mediated mineral formation. In carbonate mineralization, nucleation of crystals can be: (1) controlled directly by the organisms, like in the skeletal formation of most metazoans; (2) induced by microbial communities, by indirect precipitation mediated by their metabolic activities; or (3)
Adriano Guido +4 more
wiley +1 more source
Toward quantification of strain-related mosaicity in shocked lunar and terrestrial plagioclase by in situ micro-X-ray diffraction [PDF]
, 2015 Studies of shock metamorphism of feldspar typically rely on qualitative petrographic observations, which, while providing invaluable information, can be difficult to interpret.
Flemming, Roberta L. +2 more
core +1 more source
Shock effects in plagioclase feldspar from the Mistastin Lake impact structure, Canada [PDF]
, 2015 Shock metamorphism, caused by hypervelocity impact, is a poorly understood process in feldspar due to the complexity of the crystal structure, the relative ease of weathering, and chemical variations, making optical studies of shocked feldspars ...
Flemming, Roberta L. +2 more
core +1 more source
Shadows, gaps, and ring-like structures in protoplanetary disks [PDF]
, 2011 We study the structure of passively heated disks around T Tauri and Herbig Ae stars, and present a vectorized Monte Carlo dust radiative transfer model of protoplanetary disks. The vectorization provides a speed up factor of 100 when compared to a scalar
Acke +104 more
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2-Dust : a Dust Radiative Transfer Code for an Axisymmetric System [PDF]
, 2002 We have developed a general purpose dust radiative transfer code for an axisymmetric system, 2-Dust, motivated by the recent increasing availability of high-resolution images of circumstellar dust shells at various wavelengths.
Cornette W. M. +11 more
core +2 more sources
The Physical Structure of Protoplanetary Disks: the Serpens Cluster Compared with Other Regions [PDF]
, 2012 Spectral energy distributions are presented for 94 young stars surrounded by disks in the Serpens Molecular Cloud, based on photometry and Spitzer IRS spectra.
Merin, Bruno +3 more
core +3 more sources