Crystal of Calcite → Lower Crystallization Pressure → Contained within bedding-parallel fractures, grows as vein and forms the beef fractures.
Analysis of the force of crystallization for both calcite and nahcolite was presented as a function of the degree of solution supersaturation and the partial molar volume change of the precipitated mineral. The pressure generated from crystal growth of nahcolite is significantly higher than what calcite crystal growth can generate. This implies that crystallization forces significantly exceeding the in-situ stress condition (i.e., the crystals cannot be contained within the vein) create the widely observed large sizes of nahcolite nodules. However, calcite is usually observed as veins, implying that the forces of calcite crystallization are probably contained with the bedding-parallel fractures forming the widely observed beef fractures.
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