Anhydrite, or anhydrous calcium sulfate, is a mineral with the chemical formula CaSO4. It is in the orthorhombic crystal system, with three directions...
10 KB (868 words) - 09:33, 2 August 2024
Calcium sulfate (redirect from Β-anhydrite)
compound with the formula CaSO4 and related hydrates. In the form of γ-anhydrite (the anhydrous form), it is used as a desiccant. One particular hydrate...
19 KB (1,828 words) - 19:45, 7 June 2024
Acetic anhydride (redirect from Acetic anhydrite)
Acetic anhydride, or ethanoic anhydride, is the chemical compound with the formula (CH3CO)2O. Commonly abbreviated Ac2O, it is the simplest isolable anhydride...
17 KB (1,392 words) - 13:43, 19 July 2024
selenite. It forms as an evaporite mineral and as a hydration product of anhydrite. The Mohs scale of mineral hardness defines gypsum as hardness value 2...
42 KB (4,151 words) - 12:26, 5 August 2024
evaporites. The most common marine evaporites are calcite, gypsum and anhydrite, halite, sylvite, carnallite, langbeinite, polyhalite, and kainite. Kieserite...
15 KB (1,716 words) - 22:31, 30 July 2024
(350 °F), the nearly water-free form, called γ-anhydrite (CaSO4·nH2O where n = 0 to 0.05) is produced. γ-anhydrite reacts slowly with water to return to the...
40 KB (5,259 words) - 08:38, 28 July 2024
gypsum, anhydrite, halite, polyhalite Brine precipitate: Fe-montmorillonite, goethite, hematite, siderite, rhodochrosite, pyrite, sphalerite, anhydrite. The...
59 KB (6,498 words) - 16:25, 14 August 2024
found in limestone and the fossilised remnants of early sea life; gypsum, anhydrite, fluorite, and apatite are also sources of calcium. The name derives from...
47 KB (5,901 words) - 15:06, 21 July 2024
baryte, celestine (strontium sulfate), anglesite (lead sulfate), and anhydrite (calcium sulfate). Baryte and celestine form a solid solution (Ba,Sr)SO4...
23 KB (2,224 words) - 18:23, 8 August 2024
The drilling perforated an anhydrite layer and caused high-pressure groundwater to come into contact with the anhydrite, which then began to expand....
8 KB (800 words) - 15:34, 21 May 2024
Billingham (section Anhydrite Mine)
government from 2021. In 1983, NIREX announced a proposal to use the disused anhydrite mine as a site for the disposal of intermediate level nuclear waste. There...
33 KB (3,594 words) - 06:31, 8 August 2024
Caprock of a salt diapir at Cape Breton, Nova Scotia. The white rocks at left center are the gypsum and anhydrite carapace of the diapir....
12 KB (1,304 words) - 08:14, 22 April 2024
consists of dolomite with interbedded anhydrite and gypsum, with the upper part being limestone, with dolomite and anhydrite in part. The thickness of the Lower...
82 KB (8,118 words) - 17:08, 16 August 2024
The Barbarossa Cave (German: Barbarossahöhle) is an anhydrite cave (gypsum cave) in the Kyffhäuser Hills near Rottleben in the east German state of Thuringia...
4 KB (377 words) - 07:07, 15 February 2024
found in sedimentary rocks, often associated with the minerals gypsum, anhydrite, and halite. On occasion in some localities, it may also be found with...
9 KB (735 words) - 17:28, 24 July 2024
blanketed by the widespread deposition of Louann Salt and associated anhydrite evaporites. During the late Jurassic, continued rifting widened the basin...
56 KB (6,288 words) - 14:19, 14 July 2024
materials such as plaster and drywall. The anhydrous equivalent of gypsum is anhydrite; it can form directly from seawater in highly arid conditions. The barite...
109 KB (13,007 words) - 16:14, 20 July 2024
formed crystals and dispersed grains often embedded within gypsum and anhydrite crystals. It has a Mohs hardness of 7 to 7.5 and a specific gravity of...
5 KB (323 words) - 03:01, 12 March 2024
that the drilling perforated an anhydrite layer bringing high-pressure groundwater to come into contact with the anhydrite, which then began to expand. Currently...
30 KB (3,064 words) - 16:42, 8 June 2024
Formation is composed chiefly of dolomite and shale, interbedded with anhydrite, gypsum, and salt. Stratigraphically, the Salina is placed in the Late...
14 KB (1,300 words) - 01:07, 7 March 2024
The halite (salt) is removed first, leaving behind gypsum and anhydrite. The anhydrite and gypsum react with organic material to form calcite. The classic...
3 KB (349 words) - 15:29, 17 September 2023
that celestine might be a mixture of equal stoichiometric amounts of anhydrite [i.e., anhydrous calcium sulfate] and barite.) — Ferdinand Wurzer By 1829...
7 KB (833 words) - 19:31, 31 May 2024
(IV/VI) Andradite Andrianovite Andychristyite Andyrobertsite Anglesite Anhydrite Anilite Ankerite Annabergite Annite Anorthite Anorthoclase Antarcticite...
42 KB (2,781 words) - 16:04, 17 August 2024
Breisgau, Germany, tectonic uplift occurred instead. A previously isolated anhydrite layer came in contact with water and turned it into gypsum, doubling its...
55 KB (5,419 words) - 07:44, 8 July 2024
minerals that act as cements include: hematite, limonite, feldspars, anhydrite, gypsum, barite, clay minerals, and zeolite minerals. Sandstone that becomes...
35 KB (3,935 words) - 22:15, 15 August 2024
area that has been searched for treasure along with the till lie bits of anhydrite which become more competent deeper down. Researchers Les MacPhie, and...
19 KB (1,992 words) - 07:58, 6 July 2024
000 Limestone 5,800–6,400 19,000–21,000 Dolomite 6,400–7,300 21,000–24,000 Anhydrite 6,100 20,000 Granite 5,800–6,100 19,000–20,000 Gabbro 7,200 23,600...
10 KB (1,050 words) - 18:26, 27 April 2024
Amblygonite Analcime Anatase Andalusite Chiastolite Andesine Anglesite Anhydrite Annabergite Anorthite Antigorite Bowenite Apatite Apophyllite Aragonite...
13 KB (866 words) - 05:32, 11 March 2024
project that concerns exploitation of Pagiriai anhydrite deposit. The project includes mining of anhydrite, a mine with underground warehouses, building...
182 KB (16,808 words) - 22:17, 17 August 2024
The hydration of anhydrite to form gypsum, for example, results in an increase of volume by 63%. In arid environments where anhydrite is widespread, a...
5 KB (605 words) - 00:33, 30 November 2023