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Calcium oxalate (in archaic terminology, oxalate of lime) is a calcium salt of oxalic acid with the chemical formula CaC 2 O 4 or Ca(COO) 2. It forms hydrates CaC 2 O 4 · n H 2 O , where n varies from 1 to 3.
Weddellite, or calcium oxalate dihydrate, crystallises in a tetragonal system: the classic crystal shape is the eight-face bipyramid. Using bright field microscopy, the weddellite crystals are recognised easily by their shape, reminiscent of a postal envelope. More complex shapes of weddellite are possible; the dumbbell shape is not rare and ...
calcium oxide burnt lime: 1305-78-8 Ca(OH) 2: calcium hydroxide slaked lime: 1305-62-0 CaO 2: calcium peroxide: 1305-79-9 CaP: calcium monophosphide: 39373-03-0 CaS: calcium sulfide hepar calcies sulfurated lime oldhamite: 20548-54-3 CaSO 3: calcium sulfite: 10257-55-3 CaSO 4: calcium sulfate: 7778-18-9 CaSO 4 · 0.5H 2 O: plaster of paris ...
Oxalic acid has an oral LD Lo (lowest published lethal dose) of 600 mg/kg. [65] It has been reported that the lethal oral dose is 15 to 30 grams. [66] The toxicity of oxalic acid is due to kidney failure caused by precipitation of solid calcium oxalate. [67] Oxalate is known to cause mitochondrial dysfunction. [68]
Whewellite / ˈ h juː ə l aɪ t / is a mineral, hydrated calcium oxalate, formula Ca C 2 O 4 ·H 2 O. [6] Because of its organic content it is thought to have an indirect biological origin; this hypothesis is supported by its presence in coal and sedimentary nodules. However, it has also been found in hydrothermal deposits where a biological ...
Oxalate (systematic IUPAC name: ethanedioate) is an anion with the chemical formula C 2 O 2− 4.This dianion is colorless. It occurs naturally, including in some foods. It forms a variety of salts, for example sodium oxalate (Na 2 C 2 O 4), and several esters such as dimethyl oxalate ((CH 3) 2 C 2 O 4).
Two types naturally occur, calcium oxalate monohydrate, or whewellite (CaC 2 O 4 ·H 2 O), and calcium oxalate dihydrate, or weddellite (CaC 2 O 4 ·2H 2 O). Their appearance can be rough, smooth, spiculated (needle-like), or jackstone. Calcium oxalate stones form more readily in animals with hypercalcaemia, which can be caused by Addison's ...
Ammonium oxalate is a chemical compound with the chemical formula [N H 4] 2 C 2 O 4. Its formula is often written as (NH 4) 2 C 2 O 4 or (COONH 4) 2. It is an ammonium salt of oxalic acid. It consists of ammonium cations ([NH 4] +) and oxalate anions (C 2 O 2− 4). The structure of ammonium oxalate is ([NH 4] +) 2 [C 2 O 4] 2−.