ATHENA MINERALOGY |
Mineral: | RECTORITE |
---|---|
Formula: | (Na,Ca)Al4(Si,Al)8O20(OH)4.2H2O |
Crystal System: | Monoclinic |
Group: | Smectite group |
IMA Number: | 1967 s.p. |
References: | AM 67 (1982), 394; HB2/2 (1995) |
Type Locality: | Blue Mtn mining distr., Marble Top, Garland Co., Arkansas, USA |
Comments: | Regular Mica-Smectite interstratification |
Rectorite, 10,5cm "Mountain leather", "Bergleder", "Cuir de montagne" La Table, Savoie, France Photo and coll. P. Perroud (now in NHM Geneva). See also: athena.unige.ch -> mineral pictures |
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