The trioctahedral Zn-rich member of the chlorite group.
See Part 1. General terms: group names, chlorite

A member of the mica group characterized by octahedral vanadium and lithium and free from Al and OH, with a chemical composition of ideally KLi₂VSi₄O₁₂. Balestraite occurs in subgroup C2 symmetry because of octahedral ordering and as a 1M polytype. Balestraite occurs in Mn-rich beds within metacherts of an ophiolite sequence and was located between carbonate-rich and hematite bands at the Cerchiara mine, Eastern Liguria, Italy.

A fine-particle size, plastic, sedimentary kaolinitic clay layer with minor to abundant organic matter, important in the manufacture of ceramics. Typically found in association with lignite layers.
Cf., underclay, seat rock

The treatment of diseases, injuries, and other physical ailments by medicinal procedures in mineral springs, medical peloids or mud baths, inside the facilities of Health Resort Medicine Centers (Gutenbrunner et al., 2010). Balneotherapy is broadly interpreted to include hot or cold spring water baths, drinking of medical mineral waters rich in gases, salts, silica, sulfur, etc. Crenobalneotherapy is the term used in both France and southern Europe countries. Balnea is Latin for ‘hot baths’.

See picrolite.

A modulated, trioctahedral, mica-like layer silicate with cross-linked inverted tetrahedra with an idealized formula of Ca_0.5K_0.5M₁₀(Si_14.5Al_1.5)O₃₈(OH)₈ . nH₂O where M is medium-size divalent cations, such as Fe, Mn, Zn, Mg, and n = 2 – 6 (Heaney et al., 1992). The tetrahedral sheet consists of 5-, 6-, and 7-fold rings. Important localities for bannisterite include Franklin, New Jersey (USA), Broken Hill, Australia, and Nyberget, Sweden; localities with abundant Mn silicates.

See hydrotalcite group.

A poorly defined material, possibly interstratified biotite and vermiculite.

An obsolete varietal term for phlogopite.

An obsolete varietal term for phlogopite.