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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It can be seen from XRD analysis results, (i) mineral dissolution along with formation of alunogen and bassanite in sulfuric acid (ii) formation of merlinoite, dawsonite and brushite in phosphoric acid, that they can explain an increase in swelling and a decrease in compressibility of soil.
The purpose of the present study is twofold: (a) to investigate the thermal decomposition of oil shale host minerals and kerogen and (b) to examine how the partial pressure of C[O.sub.2] influences the Tp of dawsonite and nahcolite.
The inclusions were found to variously contain a saline (NaCl) solution, a carbonic (C[O.sub.2]) phase, and a solid phase (nahcolite, dawsonite or weloganite).
In the Liujiagou formation, the amounts of C[O.sub.2] immobilized in calcite, dawsonite, and siderite are 2.07 x [10.sup.8] kg, 4.61 x [10.sup.7] kg, and 4.59 x [10.sup.7] kg, respectively.
Calibration models were developed only for dolomite, quartz, dawsonite, nahcolite and kerogen.
This is in contrast to our simulation results where precipitation of carbonates such as dawsonite and calcite and clay minerals such as smectite and kaolinite precipitation associated with oligoclase dissolution were predicted.
The sediment waters were also sufficiently saline to precipitate disseminated crystals of nahcolite, shortite, and dawsonite along with a host of other authigenic carbonate and silicate minerals (Milton, 1977).
The chromian varieties of dawsonite and alumohydrocalcite occur as late syngenetic or epigenetic minerals in the Diablo Range of the Franciscan Complex, al California.
A group of us speculated as to whether the unknown was one species or another; suggestions included leifite, nenadkevichite, apatite, dawsonite, natrolite, phillipsite, strontianite, and aragonite.
Carbonates Ancylite-(Ce) Ancylite-(La) Aragonite Bastnasite-(Ce) Calcite Cerussite Cordylite-(Ce) Dawsonite Dolomite Donnayite-(Y) Kukharenkoite-(Ce) Rhodochrosite Siderite Strontianite Synchysite-(Ce) VUK11
In addition, excellent specimens of dawsonite were abundant.