Halite-sylvite thermoelasticity

Walker, David; Verma, Pramod Kumar; Cranswick, Lachlan M. D.; Jones, R. L.; Clark, Sue B.; Buhre, Stephan

doi:10.2138/am-2004-0124

Cited by 87 publications

(49 citation statements)

References 14 publications

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“…Consequently, NaCl salt has more capacity to increase the thermal expansion coefficient of the stone in which it crystallizes; KCl is a little lower, whilst the effect of the Na 2 SO 4 ·10H 2 O is limited. This result correlates positively with the thermal expansion coefficients of these three salts as reported by Correns (1968), Fang (2005), Walker et al (2004) and Kassem et al (2007).…”

Section: Resultssupporting

confidence: 86%

The Effect of Salts on Thermal and Hydric Dilatation of Porous Building Stone*

Al-Naddaf

2009

Archaeometry

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Fifteen desalinated sandstone drill core samples from Umm Ishrin Sandstone Formation in Petra (Cambrian age) were used for this study. The samples were mineralogically analysed using X‐ray diffraction and their physical properties were also determined. Samples with similar physical properties and mineralogical composition were taken for further experimental work. After desalination, thermal and hydric dilatation coefficients were measured, then three types of salts (NaCl, KCl and Na2SO4·10H2O), which have high solubility and consequently are the most dangerous to building stone (and are also detected in the sandstone monuments in Petra), were introduced into the samples and their contents were calculated. The results show that salt crystallization in the pores of building stones can increase their thermal dilatation and decrease their hydric dilatation to varying extents, depending on the nature of the salt. The average increase in the thermal dilatation coefficient per unit mass of salt is the lowest for the Na2SO4·10H2O‐salted samples with a value of 5.3%, while the NaCl‐salted samples have the highest value with 7.8% per salt mass. The average percentage of the decrease of the hydric dilatation coefficient is 1061% for Na2SO4·10H2O‐salted samples per mass of salt content; the NaCl‐salted samples have a value of 1510% per mass of salt content, and the KCl‐salted samples almost the same value. For the salt‐free samples, it was found that in climatic conditions with a high temperature range, the deterioration of sandstone due to temperature fluctuation is more effective than that caused by change in the moisture content, while samples with high salt content suffer more from hydric dilatation.

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Section: Resultssupporting

confidence: 86%

The Effect of Salts on Thermal and Hydric Dilatation of Porous Building Stone*

Al-Naddaf

2009

Archaeometry

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“…KCl exhibits a face centered cubic crystal structure with a lattice constant of 6.36 Å. 19 The unit cell of the (100) surface can be described by the 2D-space group p 4 mm as shown in Figure 1. Importantly, this high symmetry surface exhibits rotation centers of order 2 and 4 as well as mirror and gliding planes.…”

Section: Methodsmentioning

confidence: 99%

Morphological and Structural Investigation of Sexithiophene Growth on KCl (100)

Schwabegger

Djuric

Sitter

et al. 2012

Crystal Growth & Design

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The morphology and structure of sexithiophene deposited on KCl (100) substrates was investigated by scanning force microscopy and specular X-ray diffraction measurements. Two different needle-like structures with {010} and {4̅11} contact planes have been observed as well as islands of almost upright standing sexithiophene molecules with a {100} contact plane. Furthermore an azimuthal alignment of all three crystal orientations was observed by X-ray diffraction pole figure measurements, and the growth directions reflect the 4-fold rotational symmetry of the substrate surface. In addition the analysis of crystals with {4̅11} and {100} contact planes unveiled that they share a common crystallographic direction which is explained by ledge directed epitaxy.

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“…The resulting diffraction pattern (Fig. 5A, 1-18) was identified by comparison to standards (21,52,56). Peaks assigned to CaOx monohydrate and dihydrate were identified ( Table 2; Supplemental Fig.…”

Section: Dietary Loading Recapitulates Oxalate Nephrolithiasis Inmentioning

confidence: 99%

In vivoDrosophiliagenetic model for calcium oxalate nephrolithiasis

Hirata

Cabrero

Berkholz

et al. 2012

American Journal of Physiology-Renal Physiology

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Nephrolithiasis is a major public health problem with a complex and varied etiology. Most stones are composed of calcium oxalate (CaOx), with dietary excess a risk factor. Because of complexity of mammalian system, the details of stone formation remain to be understood. Here we have developed a nephrolithiasis model using the genetic model Drosophila melanogaster, which has a simple, transparent kidney tubule. Drosophilia reliably develops CaOx stones upon dietary oxalate supplementation, and the nucleation and growth of microliths can be viewed in real time. The Slc26 anion transporter dPrestin (Slc26a5/6) is strongly expressed in Drosophilia kidney, and biophysical analysis shows that it is a potent oxalate transporter. When dPrestin is knocked down by RNAi in fly kidney, formation of microliths is reduced, identifying dPrestin as a key player in oxalate excretion. CaOx stone formation is an ancient conserved process across >400 My of divergent evolution (fly and human), and from this study we can conclude that the fly is a good genetic model of nephrolithiasis.

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Halite-sylvite thermoelasticity

Cited by 87 publications

References 14 publications

The Effect of Salts on Thermal and Hydric Dilatation of Porous Building Stone*

The Effect of Salts on Thermal and Hydric Dilatation of Porous Building Stone*

Morphological and Structural Investigation of Sexithiophene Growth on KCl (100)

In vivoDrosophiliagenetic model for calcium oxalate nephrolithiasis

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