scholarly journals Inferring the Effects of Compositional Boundary Layers on Crystal Nucleation, Growth Textures, and Mineral Chemistry in Natural Volcanic Tephras through Submicron-Resolution Imaging

2016 ◽  
Vol 4 ◽  
Author(s):  
Georg F. Zellmer ◽  
Naoya Sakamoto ◽  
Shyh-Lung Hwang ◽  
Nozomi Matsuda ◽  
Yoshiyuki Iizuka ◽  
...  
Keyword(s):  
Boundary Layers ◽  
Mineral Chemistry ◽  
Crystal Nucleation ◽  
Resolution Imaging ◽  
Submicron Resolution ◽  
Nucleation Growth

scholarly journals Compositional boundary layers trigger liquid unmixing in a basaltic crystal mush

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Victoria C. Honour ◽  
Marian B. Holness ◽  
Bernard Charlier ◽  
Sandra C. Piazolo ◽  
Olivier Namur ◽  
...  
Keyword(s):  
Boundary Layers ◽  
Liquid Immiscibility ◽  
Atom Probe ◽  
Immiscible Liquid ◽  
Ore Deposits ◽  
Crystal Mush ◽  
Compositional Zoning ◽  
Resolution Imaging ◽  
River Plain ◽  
Crystal Interfaces

Abstract The separation of immiscible liquids has significant implications for magma evolution and the formation of magmatic ore deposits. We combine high-resolution imaging and electron probe microanalysis with the first use of atom probe tomography on tholeiitic basaltic glass from Hawaii, the Snake River Plain, and Iceland, to investigate the onset of unmixing of basaltic liquids into Fe-rich and Si-rich conjugates. We examine the relationships between unmixing and crystal growth, and the evolution of a nanoemulsion in a crystal mush. We identify the previously unrecognised role played by compositional boundary layers in promoting unmixing around growing crystals at melt-crystal interfaces. Our findings have important implications for the formation of immiscible liquid in a crystal mush, the interpretations of compositional zoning in crystals, and the role of liquid immiscibility in controlling magma physical properties.

Desalination using gas hydrates: The role of crystal nucleation, growth and separation

Desalination ◽  
2019 ◽  
Vol 468 ◽  
pp. 114049 ◽  
Author(s):  
Muhammad Naveed Khan ◽  
Cor J. Peters ◽  
Carolyn A. Koh
Keyword(s):  
Gas Hydrates ◽  
Crystal Nucleation ◽  
Nucleation Growth

Biomimetic Mineralization and Bioactivity of Phosphorylated Chitosan

2005 ◽  
Vol 288-289 ◽  
pp. 429-432 ◽  
Author(s):  
Zhi Qing Chen ◽  
Quan Li Li ◽  
Quan Zen ◽  
Gang Li ◽  
Hao Bin Jiang ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Simulated Body Fluid ◽  
Body Fluid ◽  
Crystal Nucleation ◽  
Osteoblast Proliferation ◽  
Biomimetic Mineralization ◽  
P Content ◽  
Proliferation And Differentiation ◽  
Nucleation Growth

Phosphorylated chitosans were synthesized as templates to manipulate hydroxyapatite (HA) crystal nucleation, growth and microstructure. Two kinds of insoluble phosphorylated chitosan were soaked in saturated Ca(OH)2 solution for 4 d and in 1.5× SBF (simulated body fluid) solutions for 14 d at 37 °C for biomimetic mineralization. A lower [P]-content of phosphorylated chitosan promoted greater mineralization than higher [P]-content. Phosphorylated chitosan inhibited osteoblast proliferation and differentiation in vitro, while calcium phosphate phosphorylated chitosan composites did not.

Two Types of Phase Separation and Crystal Nucleation-Growth Mechanisms for Machinable Glass Ceramic

2007 ◽  
Vol 544-545 ◽  
pp. 929-932
Author(s):  
Xin Pei Ma ◽  
Guang Xin Li ◽  
Jian Feng Yang ◽  
Zhi Hao Jin
Keyword(s):  
Phase Separation ◽  
Fine Particles ◽  
Glass Ceramics ◽  
Nucleation And Growth ◽  
Crystal Nucleation ◽  
Growth Mechanisms ◽  
Phase Precipitation ◽  
Atom Diffusion ◽  
Two Phases ◽  
Nucleation Growth

Machinable mica glass ceramics with more ZnO and B2O3 showed the phase separation by spinodal decomposition. the size of two phases formed by phase separation is in micron meter order. The nucleation and growth of crystal is performed through the diffusion of atoms. Another kind of materials with no ZnO and B2O3 addition behaves different mechanism of phase separation in terms of nucleation and growth. Many fine particles are obtained after the phase separation , the size of which is less than 100nm in diameter. Subsequently nucleation and growth in the crystallization is accomplished by aggregation and unification of the granular phase precipitation. The mechanism of the aggregation and unification nucleation-growth is different from one controlled by atom diffusion in nature. The different mechanisms in crystal nucleation and growth, caused by the composition changing.

Control of Calcium Phosphate Crystal Nucleation, Growth and Morphology by Polyelectrolytes

2003 ◽  
Vol 254-256 ◽  
pp. 11-14 ◽  
Author(s):  
Helga Füredi-Milhofer ◽  
P. Bar-Yosef Ofir ◽  
M. Sikirić ◽  
N. Garti
Keyword(s):  
Calcium Phosphate ◽  
Crystal Nucleation ◽  
Calcium Phosphate Crystal ◽  
Nucleation Growth
Sign in / Sign up

Export Citation Format

Share Document