- Mon - Sat 8:00 - 18:00
- [email protected]
- 0086-21-58386256
zone in the centre, a sulphate zone in the intermedi- ate areas (with minerals like trona, thermonatrite, thenardite and gypsum) and the carbonate zone at In the Bolivian Andes …
WhatsApp: +86 18221755073
Close mobile search navigation. Article navigation. Volume 29, Number 5
WhatsApp: +86 18221755073
The study indicates that other than biological agents, various sulfate salts like thenardite, gypsum and nahcolite with sodium and calcium in their composition, along with the surrounding …
WhatsApp: +86 18221755073
Gypsum, mirabilite, and thenardite eorescences of tu stone in the underground environment Luigi Germinario1,2 · Chiaki T. Oguchi2 Received: 26 September 2021 / Accepted: 11 March 2022
WhatsApp: +86 18221755073
sulfates, including gypsum, mirabilite, and thenardite, whose development depends on the stone–environment interaction. The underground environment is extremely humid and water is …
WhatsApp: +86 18221755073
Type of mineral occurrence: gypsum crystals, ironstone septaria The Crystal King in Ohio Caverns is one of the largest and most perfectly formed stalactites in the world. It has been in the process of forming over 250,000 years and currently …
WhatsApp: +86 18221755073
Thenardite was the exclusive salt in the yellow sandstone, while gypsum was the mainly salt in the cyan sandstone. Gypsum crust and subflorescence were the most common types of decay …
WhatsApp: +86 18221755073
The absence of Bragg reflections related to gypsum indicates that the gypsum was completely dissolved supplying Ca 2+ and SO 4 2− to the pore solution which resulted in the …
WhatsApp: +86 18221755073
The detailed mineralogical investigation focused on evaporite minerals including halite, gypsum, mirabilite, thenardite, glauberite, eugsterite, and bloedite. Gypsum and halite …
WhatsApp: +86 18221755073
Research highlights diverse impacts of gypsum on reaction products in AAMs. Yoon et al. [22] observed that incorporating 5 wt% of anhydrite or gypsum in NaOH-activated granulated blast …
WhatsApp: +86 18221755073
Thenardite is a sodium sulfate salt (Na 2 SO 4) usually found together with other sulfate salts such as mirabilite or Glauber's salt (Na 2 SO 4 ·10H 2 O), glauberite (Na 2 Ca(SO …
WhatsApp: +86 18221755073
Thenardite facies in the galleries of the Çayirhan mine (A–D), mirabilite texture (E), and secondary gypsum textures (F and G). (A) Thenardite layers. Hammer for scale. (B) Detail …
WhatsApp: +86 18221755073
Gypsum mining has a very long history in the Windsor, Hants County area. It is thought that the early French settlers were already mining it in the 1700s. ... quickly altered to white powdery …
WhatsApp: +86 18221755073
Thenardite facies in the galleries of the C ß ayirhan mine (A – D), mirabilite texture (E), and secondary gypsum textures (F and G). (A) (A) Thenardite layers.
WhatsApp: +86 18221755073
O (s, gypsum) + 2NaCl 2 (aq.). The liquid and precipitated gypsum were then centrifuged to concentrate the gypsum. The gypsum was separated from the solution and dried. The solution …
WhatsApp: +86 18221755073
The UCSs of thenardite and gypsum are 16.3 and 14.6 MPa, respectively. The maximum strain at the peak strength of rock salt (halite) is much greater than those of the …
WhatsApp: +86 18221755073
Despite this, in VNIR spectra, gypsum and thenardite were the identifiable salts for AHSa and gypsum for AHSb. In Raman analysis, gypsum was also identifiable for both …
WhatsApp: +86 18221755073
Thenardite was named by J.L. Casaseca in 1826 and published both in French and English. In both articles, the mineral name was without the accent mark, even though the family name …
WhatsApp: +86 18221755073
In the WMX2 profile, a consolidated layer of thenardite, gypsum, bloedite and halite with a thickness of 4 cm is below the bloedite layer. 4. Sampling and measurements4.1. …
WhatsApp: +86 18221755073
The site is affected by intense salt weathering, involving efflorescences and crusts composed of mixed soluble sulfates, mostly hydrated: gypsum, alunogen, alum-(Na), …
WhatsApp: +86 18221755073
(a) Thenardite crystal under a thin section (crossed nicols) with a splintery fracture along cleavage planes. (b) Photomicrograph of idiomorphic crystals of glauberite (Gl) …
WhatsApp: +86 18221755073
(up to 15%) and potassic feldspar (up to 7%)), gypsum (up to 13%) and halite (up to 14%), in low concentrations... analcime (up to 4%), aragonite, pyrite, hematite, thénardite, …
WhatsApp: +86 18221755073
Blocks of limestone and sandstone used in walls of the Manasija Monastery complex showed damage caused by the efflorescence and subflorescence of different salts in …
WhatsApp: +86 18221755073
gypsum, mirabilite, and thenardite can be interlinked with specific mineralogical and geochemical properties of Oya stone and its interaction with rainwater and groundw ater.
WhatsApp: +86 18221755073
scanning electron microscope (SEM), and electron microprobe analyses show thenardite to be the dominant phase in the exterior coatings, in association with minor microcrystalline «50 /Lm) …
WhatsApp: +86 18221755073
Gypsum, mirabilite, and thenardite efflorescences of tuff … The development of salt weathering can be discussed in terms of the environmental factors affecting the stability of the mineral …
WhatsApp: +86 18221755073
The 5th stage (57–60.25 m) consists of three salt bands with the thickness of 35–125 cm. Gypsum and thenardite dominate at 58– 58.05 m and 58.9–59.05 m with trace eugsterite, respectively ...
WhatsApp: +86 18221755073
common salts such as thenardite, thermonatrite, trona and gypsum, a small amount of eugsterite and darapskite was also present. Although these sodium and sodium–calcium salts formed …
WhatsApp: +86 18221755073
Thenardite is a sodium sulfate salt (Na2SO4) usually found together with other sulfate salts such as mirabilite or Glauber's salt (Na2SO4·10H2O), glauberite (Na2Ca(SO4)2), …
WhatsApp: +86 18221755073
Gypsum in Oman. The fastest growing export markets for Gypsum of Oman between 2021 and 2022 were India ($25.7M), Nepal ($2.29M), and Indonesia ($1.5M). Imports In 2022, Oman …
WhatsApp: +86 18221755073
Download scientific diagram | Spectral response curves of Halite, Gypsum and Thenardite with location of Landsat 8 and ASTER spectral bands (source of data: Clark et al. 1993) from …
WhatsApp: +86 18221755073
The evaporite minerals include calcite, gypsum, halite, glauberite, and thenardite, whereas clastic minerals are quartz and clay. The calcite abundance decreases from the …
WhatsApp: +86 18221755073
Occurrence: Typically in lacustrine (salt and soda lake) evaporite deposits in arid regions, also as crusts and efflorescences, which may be ephemeral, in a wide range of geologic …
WhatsApp: +86 18221755073
Traces of gypsum (1008 cm-1) were also observed, and no other bands were observed at higher Environ Earth Sci Fig. 6 a SEI images of salts on limestone after chemical treatment with …
WhatsApp: +86 18221755073
ESEM-EDS and XRD further confirmed that the surface crystals were gypsum and thenardite. Combined with the structural degradation, waterborne ions, and atmospheric …
WhatsApp: +86 18221755073
Short crystallisation and deliquescence cycles of mirabilite, epsomite and gypsum are identified by using an automated monitoring system on-site. It consists of digital cameras …
WhatsApp: +86 18221755073