The number of gram equivalent weights of the solute in one liter of solution. Useful where experiments use measured volumes and temperature effects are not being studied.
Cf., molarity, formality, molality, mole fraction
The number of gram equivalent weights of the solute in one liter of solution. Useful where experiments use measured volumes and temperature effects are not being studied.
Cf., molarity, formality, molality, mole fraction
A clay mass that has been compressed by the stress expected from just overburden, without any previous overloading.
Cf., preconsolidation stress, overconsolidation ratio
A trioctahedral member of the true mica group. The end-member formula is KLiMn3+2Si4O12. The chemical composition of norrishite is noteworthy because it is Li- and Mn-rich and anhydrous, oxygen-rich, and fluorine-poor content. Norrishite forms as the 1M polytype (space group C2/m), and the octahedral sites show Jahn-Teller distortions (Tyrna and Guggenheim, 1991). Norrishite occurs at the (now-filled) Hoskins manganese mine, near Grenfell, New South Wales, Australia.
Nsutite was originally described as one in a series of similar manganese oxide phases called “gamma MnO2“. Zwicker et al. (1962) showed that the samples they studied have a chemical formula more typical of a hydrous component, e.g., Mn(O,OH)2. S. Turner (1982), in a PhD. thesis (Arizona State University), as described in Post (1999), showed that the samples he studied are comprised of random intergrowths of pyrolusite (MnO2) and ramsdellite (MnO2) or a ramsdellite-like phase and, therefore, classification of nsutite as a mineral is questionable. Samples have numerous structural defects and grains commonly have crystallite boundaries. Large deposits occur near Nsuta, Ghana; it has been noted in marine nodules and as residual oxidation products of Mn-rich carbonates.
Cf., vernadite