ramsdellite
/ˈramzdəlʌɪt/Mineralogy
noun
A manganese-containing mineral that occurs as grey to black, platy, or finely crystalline masses, and is dimorphous with pyrolusite.
- Ramsdellite is an oxide of manganese, MnO2. Crystal system: orthorhombic..
Origin
1940s. From the name of Lewis S. Ramsdell, U.S. mineralogist, who described the mineral in 1932 (Amer. Mineral. 17 143–9) + -ite.
- water smartweed
- watersmeet
- water smoke
- Waters, Muddy
- water snail
- water snake
- water-sneak
- water soak
- water-soaked
- water softener
- water-softening
- water soldier
- water solubility
- water-soluble
- water-sorted
- water-souchy
- water source
- water space
- water spaniel
- water-speedwell
- water spider
- water spinach
- water spirit
- water splash
- water sponge