whewellite


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Related to whewellite: Weddellite

whewellite

(ˈhjuːəˌlaɪt)
n
(Minerals) mineralogy calcium oxalate
References in periodicals archive ?
The frequency of the minerals identified was: fifteen samples of whewellite Ca[C.
For example, biochars produced from eucalyptus wood at 400[degrees]C showed clear peaks of whewellite (samples 1,3,5; Singh et al.
5,6) In contrast, the only previous study to have addressed renal stone composition in Iran showed that the most common components were whewellite (81.
Calcium oxalate, which is the product of the reaction of calcium ions in the mortar and the oxalic acid secreted by the fungus, produces minerals such as weddelite and whewellite by hydration (Garg et al.
The generalized succession scheme according to Kaspar (1939) is (from oldest to youngest): older carbonates (siderite, ankerite, dolomite), barite, sulphides, whewellite, nacrite, young carbonates (calcite) and secondary minerals (sulphates).
1) one could tentatively suggest the presence of whewellite since in pure whewellite this band is found at 1 622/cm whereas in weddellite it occurs at somewhat higher energies (Babic-Ivancic et al.
The major crystalline phase in the 3 biochars produced from eucalyptus feedstocks at 400[degrees]C was whewellite (calcium oxalate, Ca([C.
During periods of dune stability the mineralogy was dominated by amorphous silica from diatom shells and sponge spicules and the biogenic calcium oxalate whewellite, (CaC204).
They're all here, in multiple samples ranging in quality from "study grade" to absolutely superb: Freiberg acanthite and stephanite, Schneeberg proustite and erythrite and roselite and uranium-bearing species, Andreasberg pyrargyrite and dyscrasite and fluorite and pink apophyllite, Siegerland malachite and anglesite and millerite and galena, Schwarzwald fluorite and barite and silver, Obermoschel cinnabar and moschellandsbergite, Ems pyromorphite and cerussite, Johanngeorgenstadt mimetite, Ohrenstock hausmannite, Fichtelgebirge topaz and microcline and herderite, Ehrenfriedersdorf cassiterite and fluorapatite, Ilfeld manganite, Ronneburg whewellite, Hagendorf phosphates .
The components are as follows: ammonium hydrogen urate (AMUR), brushite (BRUS), carbonate apatite (CARB), cystine (CYST), struvite (STRU), uric acid (URIC), weddellite (WEDD), and whewellite (WHEW; Table 1).
The key locations are within tropical Australia where rocks have been found covered with skins of various compositions, some of them with very complex chemistry, including the presence of oxalate salts, for example the minerals whewellite (Ca[C.