
Anhydrite - Wikipedia
Anhydrite, or anhydrous calcium sulfate, is a mineral with the chemical formula CaSO 4. It is in the orthorhombic crystal system, with three directions of perfect cleavage parallel to the three planes of symmetry .
硬石膏 - 百度百科
硬石膏 是一种 硫酸盐 矿物,它的成分为 无水硫酸钙,与石膏的不同之处在于它不含 结晶水。 在潮湿的环境下硬石膏就会吸收水分变成石膏。 硬石膏是重要的 造岩矿物,就是说很多岩石中都有它的成分。 硬石膏的晶体是柱状或板状,晶体聚集在一起呈块状或纤维状。 硬石膏上有一条条互相垂直的裂纹,这叫 解理。 并不是所有的矿物都具有明显的解理,也并不是所有的矿物都具有垂直的解理。 解理的形成是与晶体的结构相关的,不同的 晶体结构 会产生不同的解理。 硬石膏 …
Anhydrite | Properties, Formation, Occurrence and Uses Area
2024年4月21日 · Anhydrite is a mineral that belongs to the sulfate mineral group. Its name is derived from the Greek words “an” (without) and “hydros” (water), indicating its lack of water content. Anhydrite is composed of calcium sulfate (CaSO4) and is chemically very similar to another well-known sulfate mineral, gypsum (CaSO4·2H2O).
Anhydrite Mineral | Uses and Properties - Geology.com
Anhydrite is an evaporite mineral that occurs in extensive layered deposits in sedimentary basins where large volumes of sea water have been evaporated. It is typically interbedded with rocks that include halite, gypsum, and limestone. These accumulations can be hundreds of feet thick.
硬石膏(anhydrite)----化石网
硬石膏(anhydrite) 化学组成为Ca[SO4]、晶体属正交(斜方)晶系的硫酸盐矿物。晶体呈柱状或厚板状,集合体呈块状或纤维状产出。无色、白色,或因含杂质而呈浅灰色、浅蓝色或浅红色,玻璃光泽,具3组相互垂直的解理,可裂成长方体形解理块。
硬石膏 - 维基百科,自由的百科全书
硬石膏 (英語: Anhydrite),又称 无水石膏,是一种 硫酸盐矿物, 化学式 为CaSO 4。 它以 正交晶系 结晶,具有平行于三个对称平面的三个完美解理。 它与 重晶石 和 天青石 不同构。 明显发育的晶体略稀有,该矿物通常呈现解理块的形式。 当暴露于水时,硬石膏很容易通过吸收水而转变为更常见的 石膏 (CaSO 4 ·2H 2 O)。 这种转变是可逆的,在正常大气条件下,石膏通过加热到200 °C(400 °F)左右形成硬石膏。 [6] 硬石膏通常与 方解石 、 石盐 和 硫化物,如 方铅矿 、 …
Anhydrite: Mineral information, data and localities. - mindat.org
Named in 1804 by Abraham Gottlob Werner from the Greek άνυδρος ("anhydros") meaning "without water", in allusion to the lack of water in its composition, in contrast to gypsum, which contains water. Isostructural with Ferruccite; isostructural and isomorphous with α-BaSO4 and α-SrSO4. Readily alters to gypsum.
石膏(Gypsum)、硬石膏(Anhydrite) - 百度知道
2020年1月14日 · 石膏(Gypsum)、硬石膏(Anhydrite)一、概述石膏、硬石膏这两种矿物主要是盐湖中化学沉积作用的产物,常与石盐、钾盐及光卤石共生。 两种石膏常伴生产出,又可互相转化(表3-18-1及表3-18-2)。
Anhydrite: The mineral anhydrite information and pictures
Anhydrite is used for the production of sulfuric acid and as a filler in paper. Good specimens of this mineral are rare and are desirable to collectors. European occurrences include Altaussee, Styria, Austria; Leopoldshall, Stassfurt, Germany; and …
Anhydrite | Sulfate Mineral, Gypsum Substitute, Sedimentary Rock ...
anhydrite, an important rock-forming mineral, anhydrous calcium sulfate (CaSO 4). It differs chemically from gypsum (to which it alters in humid conditions) by having no water of crystallization. Anhydrite occurs most often with salt deposits in association with gypsum, as in the cap rock of the Texas-Louisiana salt domes.