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Laboratory Formation and Characterization of Taranakite in a Hydrol Humic Latosol Soil from Hawaii
|Title:||Laboratory Formation and Characterization of Taranakite in a Hydrol Humic Latosol Soil from Hawaii|
|Authors:||Liu, Po L.|
|Issue Date:||Oct 1966|
|Publisher:||University of Hawai'i Press|
|Citation:||Liu PL, Sherman GD, Swindale LD. 1966. Laboratory formation and characterization of taranakite in a hydrol humic latosol soil from Hawaii. Pac Sci 20(4): 496-506.|
|Abstract:||The mineral taranakite was obtained in reactions between samples
of an Akaka soil and monopotassium phosphate solutions ranging from 0.2 to 0.6
molar, at pH values of the reacting system ranging from 2.3 to 2.9. Characteristics
of the reaction products were compared with those of pure synthetic taranakite,
using X-ray, chemical, optical, infrared absorption, and differential thermal techniques.
The taranakite was essentially a potassium-aluminum-phosphate complex. There
was no indication of isomorphous substitution of iron for aluminum. The molar
ratios of K/P04 and Al/P04 of the reaction product were found to be 0.37 and
0.72 respectively. The taranakite was thought to be formed by precipitation of a
soluble phospho-alumino complex anion together with potassium ions.
The possibility is suggested of the formation of taranakite when soluble potassium
and phosphate react with Hydrol Humic and Humic Latosols in the field.
During the early stages of reaction, the reaction product is believed to be cryptocrystalline,
but the size of crystals increases with time.
|Appears in Collections:||Pacific Science Volume 20, Number 4, 1966|
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