dopplerite (doplerit)

[Named by Haidinger for the German physicist Christian Doppler (1803-54).] A substance derived from the maceration of peat or other vegetable matter. It is soft and elastic when freshly obtained, but loses two thirds of its weight of water when dried at the ordinary temperature of the air, and then has nearly the tion of cellulose. When thoroughly dry it is brittle, and has a vitreous luster and a decided conchoidal fracture. It is found in many localities in peat-bogs, and a ociated with lignite. It is one of the varieties of fo il vegetable matter called by the Germans Pechkohle (pitch-coal).