whewellite


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Related to whewellite: Weddellite

whe·wel·lite

(wē'wel-īt),
A monohydrate of calcium oxalate; found in renal calculi. Compare: weddellite.
[William Whewell, Eng. philosopher (1794-1866), + -ite]

whe·wel·lite

(wē'wel-īt)
A monohydrate of calcium oxalate; found in renal calculi.

whewellite

a form of calcium oxalate (calcium oxalate monohydrate) found in uroliths.
References in periodicals archive ?
In biochars produced at 550[degrees]C from eucalyptus materials (samples 2, 4, 6 and 13), no distinctive peaks of whewellite were found in their XRD spectra (Singh et al.
1 Whewellite Ca, K, Mg 2 Calcite Ca, K, Mg 3 Whewellite Ca, K, Mg 4 Calcite Ca, K, Mg 5 Whewellite Ca, K, Mg, Na 6 Calcite, sylvite Ca, K, Mg, Na 7 Calcite, kaolinite Ca, Mg 8 Sylvite, quartz, calcite Ca, K, Mg, Na 9 Sylvite, quartz, calcite Ca, K, Mg, Na 10 Sylvite, quartz, calcite, kaolinite, albite Ca, K, Mg, Na 11 Sylvite, quartz, calcite, kaolinite, albite Ca, K, Mg, Na 12 n.
Whewellite has been reported as rare in the geological environment (Graustein et al.
Results from XRD analyses indicate that the oxalate is in the monohydrate mineral form whewellite.
Just how calcium oxalate could end up in the supposedly [greater than]30,000 molecular weight fraction of Nelson's extraction procedure is problematic and requires further study; whewellite is only slowly and sparingly soluble in dilute acid; micro crystals or aggregates may survive the initial centrifugation in suspension and collect on the filter.
He discusses possible sources of carbon for the formation of whewellite (and another hydrated calcium oxalate mineral, weddellite), including human or other animal activities, metabolic products of algae, bacteria or lichen, or deposition from rainwater after bushfires for the organic component; with carbonates such as limestone and dolomite or gypsum possible sources for the calcium.
Formation of whewellite and weddelite by displacement reactions, American Laboratory 20: 54-61.