Natrolite RRUFF ID: R040102. Locality: Ross' Quarry, Northland, New Zealand. Source: University of Arizona Mineral Museum 12862. Owner: RRUFF. Description: Mass of colorless acicular crystals. The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis. Unoriented sample. Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW. Data as given by the link, used in the range from 3000 to 4000 cm -1 . A spline baseline adjustment is applied. Thermo Almega XR 532nm @ 100% of 150mW. Data as given by the link, used in the range from 3000 to 4000 cm -1 . A spline baseline adjustment is applied. The peak at about 3405-3410 cm -1 has a shoulder. Kolesov and Geiger are proposing the following data for scolecite, then we can provide the following comparison.