Publication Date:
2023-08-28
Description:
Todorokite is a very abundant manganese oxide mineral in many deposits in Cuba and has been noted from other localities. Six new analyses are givenl they lead to the approximate formula (Na, Ca, K, Mn+2)(Mn+4, Mn+2, Mg)6O12.3H2O. Electron diffraction data show the mineral to be orthorhombic, or monoclinic with beta near 90°. The x-ray powder pattern is indexed on a cell with a=0.75A, b=2.849A, c=9.59A, beta=90°. A differential thermal analysis curve is given.
Keywords:
Aluminium oxide; Barium oxide; Calcium oxide; Charco_Redondo_S; Cobalt oxide; Colorimetry; Copper(II) oxide; Cuba; Deposit type; DEPTH, sediment/rock; Description; Elevation of event; Event label; Flame photometry; Guanaba_S; Iron oxide, Fe2O3; Latitude of event; Longitude of event; Magnesium oxide; Manganese dioxide; Manganese oxide; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Oxygen; Polarograph; Ponupo_S; Potassium oxide; Quinto_S; Sample ID; Silicon dioxide; Sodium oxide; Specific gravity; Strontium oxide; Taratana_S; Water in rock; Wet chemistry
Type:
Dataset
Format:
text/tab-separated-values, 102 data points
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