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Reaction pathways and textural aspects of the replacement of anhydrite by calcite at 25 °C
(2017)
The replacement of sulfate minerals by calcium carbonate polymorphs (carbonation) has important implications in various geological processes occurring in Earth surface environments. In this paper we report the results of ...
A route for the direct crystallization of dolomite
(2015)
The direct crystallization of dolomite from an aqueous solution at temperatures between 60–220 °C was followed in situ through time-resolved synchrotron-based energy-dispersive X-ray diffraction combined with offline ...
Salinity-Dependent Adhesion Response Properties of Aluminosilicate (K-Feldspar) Surfaces
(2017)
Flooding sandstone oil reservoirs with low salinity water can lead to a significant increase in oil recovery, a phenomenon called “the low salinity effect”. Although there are many factors that contribute to this response, ...
Structural properties and transformations of precipitated FeS
(2012)
Nanocrystalline iron sulfides form in diverse anoxic environments. The initial precipitate is commonly referred to as nanocrystalline mackinawite (FeS) or amorphous FeS. In order to better understand the structure of the ...
An experimental study of hydroxylbastnasite solubility in aqueous solutions at 25 °C
(2016)
The mobility of rare earth elements (REEs) in natural aqueous solutions is of increasing interest due to their application in numerous high-tech and renewable energy technologies (e.g., wind turbines and electric vehicles), ...
Crystal structure of dicalcium sodium monohydrogen diarsenate hexahydrate, Ca2Na[HAsO4][AsO4] · 6H2O
(De Gruyter, 2006)
As2Ca2H13NaO14, triclinic, P1 (no. 2), a = 6.680(5) Å,
b = 8.223(4) Å, c = 12.537(3) Å, = 73.46(5)°,
= 78.89(4)°, = 87.47(5)°, V = 647.7 Å3
, Z = 2,
Rgt(F) = 0.062, wRref(F2
) = 0.197, T = 293 K.
Source of ...
Biomineralisation by earthworms - an investigation into the stability and distribution of amorphous calcium carbonate
(2015)
BACKGROUND: Many biominerals form from amorphous calcium carbonate (ACC), but this phase is highly unstable when synthesised in its pure form inorganically. Several species of earthworm secrete calcium carbonate granules ...
ACC and vaterite as metastable intermediates in the solution based crystallization of CaCO3
(Springer International Publishing, 2017)
Amorphous calcium carbonate (ACC) and vaterite are not very common in abiotic systems, but they play a very significant role in biomineralization processes and are key in the global carbon cycle. Despite their importance, ...
The effect of heating on the morphology of crystalline neodymium hydroxycarbonate, NdCO3OH
(2014)
The crystallization of hexagonal NdCO3OH through hydrothermal synthesis carried out at slow (reaching the desired temperature within 100 min) and quick (50 min) rates of heating but at variable temperatures (165–220ºC) are ...
Organic synthesis on Mars by electrochemical reduction of CO2
(American Association for the Advancement of Science, 2018)
The sources and nature of organic carbon on Mars have been a subject of intense research. Steele et al. (2012) showed that 10 martian meteorites contain macromolecular carbon phases contained within pyroxene- and olivine-hosted ...