Taranakite
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Taranakite is a hydrated alkali iron-aluminium phosphate mineral with the chemical formula 3526·18 H2O. It forms from the reaction of clay minerals or aluminous rocks with solutions enriched in phosph
Taranakite Hydrous basic potassium aluminum phosphate South Farallon Island San Francisco California 1629
Two of the Sugar Loaf Islands.
Wavellite
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Wavellite is an aluminium basic phosphate mineral with formula Al323·5H2O. Distinct crystals are rare, and it normally occurs as translucent green radial or spherical clusters.
Taranakite
…thin yellowish-white amorphous seams in fissures within trachytic rocks. Within the taranakite, dark yellow-brown seams were observed and thought to be wavellite. Modern X-ray analysis later showed this inclusion to be vashegyite (Al11(PO4)9(OH)6)·38H2O). Taranakite itself was initially mistaken for wavellite…
Wavellite cluster from Mauldin Mountain Quarries, Mauldin Mt., Montgomery County, Arkansas
Wavellite from the Avant Mine, Garland County, Arkansas, showing spherical structure (size: 3.4 x 2.0 x 1.1 cm)