An obsolete term for muscovite.

The ratio of the major principal effective stress to the minor principal effective stress among three orthogonal planes at any stressed point, where there are zero shear stresses.

Inappropriate usage for an octahedral sheet.
See octahedral sheet

For phyllosilicates, an octahedral sheet contains edge-sharing octahedra that are connected in a continuous two-dimensional arrangement. These octahedra generally contain small (e.g., Al, Fe³⁺) or medium size (e.g., Mg, Fe²⁺, Li) cations with coordination anions (e.g., O, OH, Cl, S). In some phyllosilicates (e.g., modulated phyllosilicates), the octahedral sheet may be only partially continuous, for example, forming one-dimensional strips of octahedra or islands of octahedra. There are two types of octahedral sheets, dioctahedral and trioctahedral. After Guggenheim et al. (2006) and references therein.
Cf., dioctahedral sheet, trioctahedral sheet, plane, layer

An obsolete term for biotite.

An obsolete term for biotite.

A Fe₊₃-rich, green, 1:1 serpentine type clay mineral that is intermediate between dioctahedral and trioctahedral, approximately (Fe³⁺, Fe²⁺, Mg, Al, Ti, Mn²⁺)_2.5(Si,Al)₂O₅(OH)₄. Odinite forms primarily as 1M (space group Cm) with lesser amounts of 1T (trigonal or hexagonal) polytypes. Octahedral cation totals range from 2.30 to 2.54 cations per 3.0 sites for samples described. Apparently forms in association with organic material on shallow marine shelves and reef lagoonal areas in tropical latitudes.

An obsolete term for biotite.

A one-dimensional, consolidation testing apparatus commonly used to measure the compressibility and consolidation behavior of soft clayey soils. In such tests, the soil is confined to one-dimensional compression and one-dimensional flow. Only vertical deformation or strain occurs, whereas the lateral or horizontal deformation is restricted or zero.

An obsolete term for barian muscovite.