dawsonite


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dawsonite

[′dȯs·ən‚īt]
(mineralogy)
NaAl(OH)2CO3 A white, bladed mineral found in certain oil shales that contains large quantities of alumina; specific gravity is 2.40.
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50 pm) dawsonite, nahcolite, quartz, dolomite, albite, illite, analcime, pyrite and kerogen were used to make samples.
Dawsonite shows a 20% weight loss within a 250-360[degrees]C range.
2]) phase, and a solid phase (nahcolite, dawsonite or weloganite).
The alteration of analcime to dawsonite probably proceeded according to the reaction:
Minerals such as dawsonite and nahcolite interfere with the pyrolysis process of kerogen [10].
Dawsonite (DAW), nahcolite (NACO), quartz (QTZ), dolomite (DOLO), alabite (ALB), illite (ILL), analcime (ANL), and kerogen (KERO) were used to prepare samples.
Bureau of Mines opened an experimental mine that included a 723-meter-deep shaft with several room-and-pillar entries in the northern part of the Piceance Creek Basin to conduct research on the deeper deposits of oil shale, which are commingled with nahcolite and dawsonite.
Dawsonite has been previously reported from California at the Oriental mine in the Alleghany district, Sierra County (Ferguson and Gannett, 1932; Coveney and Kelly, 1971).
Another damaged crystal was immersed in two index liquids matching the two indices of dawsonite most likely to be seen in lath shaped crystals of that mineral.
Dawsonite has also been found in a hydrothermalite pod as sharp, colorless, terminated prismatic crystals, 1-3 mm long.
By August, steamboats were busily carrying away Dawsonites, eight thousand in one week alone.
Unlike other Dawsonites, however, Welzl did not prospect for gold.