Arsenate - Wikipedia
网页The arsenate is an ion with the chemical formula AsO3− 4. [1] Bonding in arsenate consists of a central arsenic atom, with oxidation state +5, double bonded to one oxygen atom and single bonded to a further three oxygen atoms. [2] The four oxygen atoms orient around the arsenic atom in a tetrahedral geometry. [2]
Arsenate mineral - Wikipedia
网页Arsenate mineral. Arsenate minerals usually refer to the naturally occurring orthoarsenates, possessing the (AsO 4) 3− anion group and, more rarely, other arsenates with anions like AsO 3 (OH) 2− (also written HAsO 42−) (example: pharmacolite Ca (AsO 3 OH). 2H 2 O) or (very rarely) [AsO 2 (OH) 2] − (example: andyrobertsite ).
Arsenate mineral | Structure, Occurrence, Chemistry | Britannica
网页Arsenate mineral, any of a group of naturally occurring compounds of arsenic, oxygen, and various metals, most of which are rare, having crystallized under very restricted conditions. At the mineralogically famous Långban iron and manganese mines in central Sweden, more than 50 species of arsenate.
14.11: Phosphates, Arsenates, and Vanadates - Geosciences …
网页2022年8月28日 · A large number of phosphates, sulfates, arsenates, vanadates, and silicates are isostructural with apatite, but none are common.
Arsenic - Wikipedia
网页Arsenic is a chemical element with the symbol As and the atomic number 33. It is a metalloid and one of the pnictogens, and therefore shares many properties with its group 15 neighbors phosphorus and antimony. Arsenic is a notoriously toxic heavy metal.
Arsenate - an overview | ScienceDirect Topics
网页Arsenic acid, H 3 AsO 4, formed by the oxidation of arsenous acid, forms arsenates. Only the alkali arsenates are soluble in water; other arsenates are precipitated from solution, e.g., calcium arsenate:
Arsenate Mineral - an overview | ScienceDirect Topics
网页Common arsenic oxide minerals include arsenates or As 5 + species such as scorodite, arseniosiderite, and pharmacosiderite and aresnites or As 3 + species such as claudetite (As 2 O 3) and arsenolite (As 2 O 3). Arsenates are common in mine wastes and mine-drainage settings, mainly because of the common and widespread occurrence of arsenopyrite ...
Arsenates: Understanding Their Nature, Applications, and …
网页2023年5月17日 · Arsenates, a class of chemical compounds containing arsenic, play significant roles in various fields, including chemistry, medicine, and agriculture. In this article, we will explore the nature of arsenates, their applications, and the potential environmental implications associated with their use.
Arsenate - an overview | ScienceDirect Topics
网页Arsenates are salts or esters of arsenic acid that contain the arsenate ion (AsO 4 3 −) in its chemical formula. They are considered a subclass of the phosphate mineral group because of the similarity in size and charge of phosphate and arsenate anionic units ( Flora, 2015 ).
Arsenic - SpringerLink
网页Arsenic (symbol As: atomic number 33, atomic weight 74.9) is named from the Greek arsenikos meaning male, and was discovered around 1250 AD. Metallic arsenic is gray and sublimes at 613°C. Arsenic can exist in any one of four different oxidation states: As −III, As (metallic arsenic), As III and As V, but has only the one stable isotope.