Table: 3-21

Return to the Main Document

Table 3-21. Normative Model for Precipitates Formed from Evaporating 1 kg of Synthetic J-13 Water, Compared with Qualitative Laboratory Observations

Predicted Normative Species	Predicted Moles/kg	Observed Species
Species Constituting >90% of Total Molality
silica (amorphous)	7.925E–04	SiO₂ (amorphous)
thermonatrite (Na₂CO₃:H₂O)	6.917E–04	thermonatrite (Na₂CO₃:H₂O)
halite (NaCl)	1.975E–04	halite (NaCl)
thenardite (Na₂SO₄)	1.926E–04	gypsum (CaSO₄:2H₂O)^a
thenardite (Na₂SO₄)	1.926E–04	anhydrite (CaSO₄)^a
niter (KNO₃)	1.274E–04	niter (KNO₃)
calcite/Aragonite (CaCO₃)	8.208E–05	calcite (CaCO₃)
calcite/Aragonite (CaCO₃)	8.208E–05	aragonite (CaCO₃)
Remaining Species
magnesite (MgCO₃)^b	8.638E–05	hectorite (Na_0.33Mg₃Si₄O₁₀(F,OH)₂)^a
fluorite (CaF₂)	6.263E–05
sylvite (KCl)	5.594E–06

Source: CRWMS M&O 2000t

NOTES:
^a A minor constituent; identification is uncertain.

^b Magnesium may precipitate as Mg-calcite but is represented stoichiometrically as magnesite.