scholarly journals Additives Control the Stability of Amorphous Calcium Carbonate via Two Different Mechanisms: Surface Adsorption versus Bulk Incorporation

2020 ◽  
Vol 30 (23) ◽  
pp. 2000003 ◽  
Author(s):  
Zhaoyong Zou ◽  
Xiaofei Yang ◽  
Marie Albéric ◽  
Tobias Heil ◽  
Qihang Wang ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Surface Adsorption ◽  
Amorphous Calcium Carbonate ◽  
The Stability

Layered growth of crayfish gastrolith: About the stability of amorphous calcium carbonate and role of additives

2015 ◽  
Vol 189 (1) ◽  
pp. 28-36 ◽  
Author(s):  
Wouter J.E.M. Habraken ◽  
Admir Masic ◽  
Luca Bertinetti ◽  
Ali Al-Sawalmih ◽  
Lilah Glazer ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Amorphous Calcium Carbonate ◽  
Layered Growth ◽  
The Stability

scholarly journals Biomineralisation by earthworms – an investigation into the stability and distribution of amorphous calcium carbonate

2015 ◽  
Vol 16 (1) ◽  
Author(s):  
Mark E Hodson ◽  
Liane G Benning ◽  
Bea Demarchi ◽  
Kirsty E H Penkman ◽  
Juan D Rodriguez-Blanco ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Amorphous Calcium Carbonate ◽  
The Stability

The role of pH and Mg on the stability and crystallization of amorphous calcium carbonate

2012 ◽  
Vol 536 ◽  
pp. S477-S479 ◽  
Author(s):  
J.D. Rodriguez-Blanco ◽  
S. Shaw ◽  
P. Bots ◽  
T. Roncal-Herrero ◽  
L.G. Benning
Keyword(s):  
Calcium Carbonate ◽  
Amorphous Calcium Carbonate ◽  
The Stability

Influence of Phosphate Ions on the Stability of Amorphous Calcium Carbonate

2006 ◽  
Vol 309-311 ◽  
pp. 179-182 ◽  
Author(s):  
S. Akhtar ◽  
J.E. Barralet ◽  
David Farrar ◽  
Adrian J. Wright
Keyword(s):  
Calcium Carbonate ◽  
Amorphous Calcium Carbonate ◽  
Molar Ratios ◽  
Phosphate Ions ◽  
The Stability

Amorphous calcium carbonate (ACC) occurs with varying stabilities in different organisms. It is thought that the stability is influenced by certain ions and proteins. We describe here a study investigating the particular influence of phosphate ions on the stability of ACC. Synthesised ACC was treated with different concentrations of Na2HPO4 and molar ratios of PO4:Ca ≥ 12:1 were shown to be effective in preventing crystallisation of ACC to calcite. The nature of the resulting sample is discussed.

scholarly journals Pure hydroxyapatite synthesis originating from amorphous calcium carbonate

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Michika Sawada ◽  
Kandi Sridhar ◽  
Yasuharu Kanda ◽  
Shinya Yamanaka
Keyword(s):  
Calcium Carbonate ◽  
Calcium Phosphate ◽  
Room Temperature ◽  
Molar Ratio ◽  
Final Phase ◽  
Amorphous Calcium Carbonate ◽  
Phosphate Compound ◽  
Synthesis Strategy ◽  
Phosphorylation Reaction ◽  
Subsequent Calcination

AbstractWe report a synthesis strategy for pure hydroxyapatite (HAp) using an amorphous calcium carbonate (ACC) colloid as the starting source. Room-temperature phosphorylation and subsequent calcination produce pure HAp via intermediate amorphous calcium phosphate (ACP). The pre-calcined sample undergoes a competitive transformation from ACC to ACP and crystalline calcium carbonate. The water content, ACC concentration, Ca/P molar ratio, and pH during the phosphorylation reaction play crucial roles in the final phase of the crystalline phosphate compound. Pure HAp is formed after ACP is transformed from ACC at a low concentration (1 wt%) of ACC colloid (1.71 < Ca/P < 1.88), whereas Ca/P = 1.51 leads to pure β-tricalcium phosphate. The ACP phases are precursors for calcium phosphate compounds and may determine the final crystalline phase.

scholarly journals On the Relation of Amorphous Calcium Carbonate and the Macromechanical Properties of Sea Urchin Spines

2020 ◽  
Vol 22 (4) ◽  
pp. 1900922 ◽  
Author(s):  
Christoph Lauer ◽  
Sebastian Haußmann ◽  
Patrick Schmidt ◽  
Carolin Fischer ◽  
Doreen Rapp ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Sea Urchin ◽  
Amorphous Calcium Carbonate ◽  
Sea Urchin Spines

scholarly journals Transformation mechanism of amorphous calcium carbonate into calcite in the sea urchin larval spicule

2008 ◽  
Vol 105 (45) ◽  
pp. 17362-17366 ◽  
Author(s):  
Y. Politi ◽  
R. A. Metzler ◽  
M. Abrecht ◽  
B. Gilbert ◽  
F. H. Wilt ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Sea Urchin ◽  
Amorphous Calcium Carbonate ◽  
Transformation Mechanism

scholarly journals Amorphous calcium carbonate transforms into calcite during sea urchin larval spicule growth

1997 ◽  
Vol 264 (1380) ◽  
pp. 461-465 ◽  
Author(s):  
Elia Beniash ◽  
Joanna Aizenberg ◽  
Lia Addadi ◽  
Stephen Weiner
Keyword(s):  
Calcium Carbonate ◽  
Sea Urchin ◽  
Amorphous Calcium Carbonate
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