Anhydrite, or anhydrous calcium sulfate, is a mineral with the chemical formula CaSO4. It is in the orthorhombic crystal system, with three directions...

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...

Acetic anhydride, or ethanoic anhydride, is the chemical compound with the formula (CH3CO)2O. Commonly abbreviated Ac2O, it is the simplest isolable anhydride...

(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...

evaporites. The most common marine evaporites are calcite, gypsum and anhydrite, halite, sylvite, carnallite, langbeinite, polyhalite, and kainite. Kieserite...

gypsum, anhydrite, halite, polyhalite Brine precipitate: Fe-montmorillonite, goethite, hematite, siderite, rhodochrosite, pyrite, sphalerite, anhydrite. The...

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...

baryte, celestine (strontium sulfate), anglesite (lead sulfate), and anhydrite (calcium sulfate). Baryte and celestine form a solid solution (Ba,Sr)SO4...

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...

The halite (salt) is removed first, leaving behind gypsum and anhydrite. The anhydrite and gypsum react with organic material to form calcite. The classic...

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...

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...

found in sedimentary rocks, often associated with the minerals gypsum, anhydrite, and halite. On occasion in some localities, it may also be found with...

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....

minerals that act as cements include: hematite, limonite, feldspars, anhydrite, gypsum, barite, clay minerals, and zeolite minerals. Sandstone that becomes...

Formation is composed chiefly of dolomite and shale, interbedded with anhydrite, gypsum, and salt. Stratigraphically, the Salina is placed in the Late...

Andersonite Andesine Andorite (IV/VI) Andradite Andyrobertsite Anglesite Anhydrite Ankerite Annabergite Annite Anorthite Anorthoclase Antarcticite Anthonyite...

The drilling perforated an anhydrite layer and caused high-pressure groundwater to come into contact with the anhydrite, which then began to expand....

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...

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...

blanketed by the widespread deposition of Louann Salt and associated anhydrite evaporites. During the late Jurassic, continued rifting widened the basin...

that celestine might be a mixture of equal stoichiometric amounts of anhydrite [i.e., anhydrous calcium sulfate] and barite.) — Ferdinand Wurzer By 1829...

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...

that the drilling perforated an anhydrite layer bringing high-pressure groundwater to come into contact with the anhydrite, which then began to expand. Currently...

project that concerns exploitation of Pagiriai anhydrite deposit. The project includes mining of anhydrite, a mine with underground warehouses, building...

take the form of anhydrite phenocrysts in the magma. The 1982 El Chichón eruption produced trachyandesite pumice rich in anhydrite, and released 2.2...

mobilization due to the weight of the overlying rock. Salt domes contain anhydrite, gypsum, and native sulfur, in addition to halite and sylvite. They are...

spar"―a term more properly applied to fluorspar. Black alabaster is a rare anhydrite form of the gypsum-based mineral. This black form is found in only three...

initial stages of a vent chimney begin with the deposition of the mineral anhydrite. Sulfides of copper, iron, and zinc then precipitate in the chimney gaps...

The Barbarossa Cave (German: Barbarossahöhle) is an anhydrite cave (gypsum cave) in the Kyffhäuser Hills near Rottleben in the east German state of Thuringia...