搜索结果: 1-15 共查到“地质学 Transitions”相关记录18条 . 查询时间(0.059 秒)
中国地质大学科学技术发展院陈中强* 等 BGEG国家重点实验室. Earth-Science Reviews (2019), Biosedimentological features of major microbe-metazoan transitions (MMTs) from Precambrian to Cenozoic
地史时期；生物沉积；后生生物；微生物；过渡期
2021/10/20
近日，中国地质大学生物地质与环境地质国家重点实验室陈中强教授团队题为《从前寒武纪到新生代主要的微生物-后生动物过渡期的生物沉积特征》（Biosedimentological features of major microbe-metazoan transitions (MMTs) from Precambrian to Cenozoic）的学术论文在地学《Earth-Science Reviews...
Interlayer structure, anion dynamics, and phase transitions in mixed-metal layered hydroxides: Variable temperature 35Cl NMR spectroscopy of hydrotalcite and Ca-aluminate hydrate (hydrocalumite)
Cl -intercalated hydrotalcite Ca-aluminate hydrate Variable temperature
2012/3/31
The Cl NMR spectroscopy of Cl -intercalated hydrotalcite and the Ca-aluminate hydrate, the presence of
hydrocalumite (Friedel°Os salt) demonstrates dynamical behavior of interlayer C
dynamical orde...
Computer simulation of pressure-induced structural transitions in MgO [001] tilt grain boundaries
pressure-induced tilt grain boundaries
2012/3/30
Atomisticsimulationsusinglatticeandmoleculardynamicswerecarriedoutonthe
{210},{310},and{410}tiltgrainboundariesofMgOasafunctionofpressureupto100
GPaatasingletemperatureof600K.Thecalculationsshowasig...
Iron sulfides from magnetotactic bacteria: Structure, composition, and phase transitions
Iron sulfides magnetotactic bacteria Structure composition phase transitions
2012/4/1
The top 20 cm of sediments at active cold seeps in Monterey Bay, coastal California,contain framboidal pyrite that occurs as infillings and pseudomorphs of the chambers of the tests of foraminifera an...
Molecular dynamics simulations of phase transitions and melting in perovskite MgSiO3 at mantle pressures
Molecular dynamics simulations phase transitions MgSiO3
2012/4/1
The high pressure phase transitions and melting of the mantle mineral MgSiO3 with the perovskite structure were investigated using molecular dynamics (MD) simulations of a large system of atoms on a p...
Anti-phase boundaries and phase transitions in titanite: An X-ray diffraction study
Anti-phase boundaries phase transitions titanite X-ray diffraction study
2012/4/5
X-raydiffractionrockingcurvesoftitanite,CaTiSiO ,weremeasuredusinganovelhigh-resolutiondiffractometer.ThreeBraggre?ectionswererecordedasafunctionoftemperatureandtheirpro?lesanalyzedintermsofaGaussianB...
Theory of displacive phase transitions in minerals
Theory of displacive phase transitions minerals
2012/4/1
Alattice-dynamicaltreatmentofdisplacivephasetransitionsleadsnaturallytothesoft-
modemodel,inwhichthephase-transitionmechanisminvolvesaphononfrequencythat
fallstozeroatthetransitiontemperature.Thebas...
Memory effects of domain structures during displacive phase transitions: A high-temperature TEM study of quartz and anorthite
Memory effects domain structures displacive phase transitions high-temperature TEM study of quartz anorthite
2012/4/1
Memory effects ass~iated with the Dauphine twins in a quartz and the c-antiphase
domains (c-APDs) in PI anorthite have been investigated by in situ hot-stage transmission
electron microscopy (TEM). ...
Structural behavior, crystal chemistry, and phase transitions in substituted leucite: High-resolution neutron powder diffraction studies
Structural behavior crystal chemistry phase transitions substituted leucite High-resolution neutron powder diffraction studies
2012/4/1
High-resolution neutron powder diffraction was used to study phase transitions in theleucite phases of KAlSi206, RbAlSi20", CsAlSi206, and KFeSi206. Thetemperature-depen-dent structural behavior invol...
Lattice simulation studies of the ferroelastic phase transitions in (Na,K)AlSi3O8 and (Sr,Ca)Al2Si2O8 feldspar solid solutions
Lattice simulation studies ferroelastic phase transitions (Na,K)AlSi3O8 (Sr,Ca)Al2Si2O8 feldspar solid solutions
2012/4/1
Lattice-energy minimization calculations have been performed on the feldspar systems
(Ca,Sr)AI2Si20g and disordered (Na,K)AlSi30g as functions of composition to simulate the
ferroelastic phase trans...
Direct observation of phase transitions in aluminate sodalite, Ca8[Al12O24](CrO4)2
Direct observation phase transitions aluminate sodalite Ca8[Al12O24](CrO4)2
2012/4/9
Transmission electron microscopy (TEM) wasused to study the structural changes that occur in aluminate sodalite, Ca8[AI12024](Cr04)2,whenit is heated withthe electron beam. Initially, a twinned orthor...
Rigid-unit phonon modes and structural phase transitions in framework silicates
Rigid-unit phonon modes phase transitions framework silicates
2012/4/6
Therigid-unit modemodelprovides manynewinsights into the stability and physical properties offramework silicates. In this modelthe Si04and Al04tetrahedra aretreated asverystiff,to a first approximatio...
Microstructures and high-temperature phase transitions in kalsilite
Microstructures high-temperature phase transitions kalsilite
2012/4/5
Adiversity of twinning and exsolution textures has been observed by transmission electron microscopy in natural kalsilite from volcanic and metamorphic rocks (Mount Nyiragongo, Zaire; Alban Hills, Ita...
In situ 29Si MAS NMR studies of structural phase transitions of tridymite
situ 29Si MAS NMR studies phase transitions tridymite
2012/4/5
The structural phase transitions ofmonoclinic tridymite that occur at elevated temper-atures, as wellas the structure of the high-temperature modifications, have been studied by 29SiMASNMR. The sample...
Phonon-spectroscopy on alkali-feldspars: Phase transitions and solid solutions
Phonon-spectroscopy alkali-feldspars Phase transitions solid solutions
2012/4/5
Thephonon spectra ofIR-active vibrations in alkalifeldspars havebeensystematically investigated in the spectral range 50-2000 cm-I attemperatures between20and 900K. SampleswithhighdegreesofAl-Siorderd...