GYPSUM. NN Card Specie Formula Space Group; 1. 1828 [1], tgypsum: CaSO 4 · 2H 2 O *I 2/a; 2. 1829 [2], tgypsum, at o K: CaSO 4 · 2[HH] 2 O *I 2/a; 3. 1830 [3], tgypsum, at 150 o K: CaSO 4 · 2[HH] 2 O *I 2/a; 4. 1831 [4], tgypsum, at 320 o K: CaSO 4 · 2[HH] 2 O *I 2/a; 5. 4946 [5], tgypsum, at Gpa: CaSO 4 · 2H 2 O: C 2/c; 6.
Calcined gypsum is a historical binder that was used already several thousands of years ago. It has been found in the binder of buildings in the territory of presentday Syria ... Acta Polytechnica Vol. 44 No. 5–6/2004. measurements are also required, the validity of the condition
Karst is a topography formed from the dissolution of soluble rocks such as limestone, dolomite, and gypsum. It is characterized by underground drainage systems with sinkholes and caves. [1] [2] It has also been documented for more weathering resistant rocks, such as quartzite, given the right conditions. [3]
The new GUM database provides insights into the regional distribution of unconsolidated sediments and their properties. The GUM comprises 911,551 polygons and describes not only sediment types and subtypes, but also parameters like grain size, mineralogy, age and thickness where available.
· The term "gypsiferous silts" has been used since the 1960s by many authors, but it has relied on unclear, ambiguous criteria that attributed aeolian, colluvial or alluvial origins to these materials. The aim of this paper is to clarify the use of the term "gypsiferous silts" applied to siltsized, gypsumbearing sediments on surface formations in the Ebro Basin, using .
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Gypsum occurrences at deep sea offshore regions are rare and uncommon. Gypsum may precipitate from rising sulfaterich brines or due to pyrite oxidation at depth, which would flush more and more sulfate ions in to the medium and precipitates as gypsum when it exceeds the solubility concentration of gypsum (Corselli and Aghib 1987; Wang et al 2004).
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Auyán Tepui (Spanish pronunciation: [awˈʝan teˈpuj]), also spelled Ayan, is a tepui in Bolívar state, Venezuela. It is the most visited and one of the largest (but not the highest) tepuis in the Guiana Highlands, with a summit area of km 2 ( sq mi) and an estimated slope area of 715 km 2 (276 sq mi). The unevenly heartshaped summit plateau of Auyántepui is heavily .
Acta Crystallographica Section B Acta Crystallographica Section B STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS: IUCr IT WDC. ... A refinement of the crystal structure of gypsum CaSO 2 O. W. F. Cole and C. J. Lancucki. Read article Similar articles. This is the first page of the article you requested. Follow Acta Cryst. B: Ealerts ...
· Gypsum quantitative determination in cements may be done from their thermogravimetric analysis (TG) data, which uses the mass of the water released from its gypsum dehydration during cement analysis, to determinate its content stoichiometrically. Depending on the operational conditions used to mill the gypsum with clinker, its partial .
1 Siltsized sediments and gypsum on surface formations in the Ebro Basin: a disambiguation of the term "gypsiferous silts" Rosa M. Poch 1 Rafael RodríguezOchoa Octavio Artieda2 J. Carles Balasch1 Jaume Boixadera1,3 1Departament de Medi Ambient i Ciències del Sòl, Universitat de Lleida Av. Rovira Roure 191, 25198 Lleida.
