The hydrous component of pyrope from the Dora Maira Massif, Western Alps
GEORGE R. ROSSMAN, ANTON BERAN
Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena,
California, 91125, U.S.A.
Institut fur Mineralogie und Kristallographie, Technische Universitat Berlin, D-1000 Berlin 12,
Pyrope from the Dora Maira Massif, Western Alps, contains a trace
hydroxide component (0.003 to 0.002 wt. %). Its infrared absorption
spectrum, consisting of four sharp bands in the 3,600-3,660 cm-1
region, is different from that of all other reported pyrope and
pyrope-almandine garnet spectra, and does not correspond to the known
hydrous inclusions in the pyrope.
Infrared spectrum of a series of 0.5 mm thick slices of pyrope from the Doria Maria Massif.