Motukoreaite
A variety of Minerals

What is Motukoreaite?
Motukoreaite occurs as claylike cement or hexagonal tabular crystals up to 0.2 mm (0.0079 in) in size that form rosettes, boxworks, and subparallel aggregates. The crystals are semitransparent and are white, pale yellow, pale yellow-green, or colorless. The mineral readily dehydrates partially. Motukoreaite has been found in association with apatite, barite, calcite, chabazite, calcic plagioclase, gismondine, gypsum, hisingerite, hydrotalcite, limonite, magnetite, montmorillonite, nordstrandite, olivine, phillipsite, pyroxene, quartz, and zeolites.
Motukoreaite Market Value Calculator
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Motukoreaite Localities Map
See where Motukoreaite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Key Characteristics
Formation of Motukoreaite
Motukoreaite forms from the alteration of submarine basaltic glass at temperatures below 150 °C (302 °F). The alteration occurs in the sequence motukoreaite, phillipsite, calcite. A study in 1989 suggested that motukoreaite is a common, widely occurring mineral.
Quick Facts
Physical Properties
- Color
- colorless, white, yellow
- Hardness (Mohs)
- 1 - 1.5
- Density
- 1.478 g/cm³
Chemical Properties
- Chemical Formula
- Mg6Al3(OH)18[Na(H2O)6][SO<sub>4</sub>]2 · 6H2O
- Elements
- Al, H, Mg, Na, O, S

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