Comment on “Water decreases displacive phase transition temperature in alkali feldspar” by Liu et al. (2018)

Reply to Kroll and Schmid-Beurmann's comment on “Water decreases displacive phase transition temperature in alkali feldspar” by Liu et al. (2018)

“…2 and 3 with higher water contents. Anyway, we agree with Kroll and Schmid-Beurmann (2020) that an internal standard should be applied to eliminate systematic errors and obtain accurate lattice parameters. But in this study, it will not change the main conclusions.…”

“…Thus, different hydrogen species may have different impacts on the displacive phase transition in feldspar. Since hydrogen species in those samples (hydrothermally synthesized or prepared from annealing) mentioned by Kroll and Schmid-Beurmann (2020) are unclear, hydrogen effects on the displacive phase transition could not be commented on. In contrast, the three samples used in are anorthoclases with the type IIa OH.…”

“…Point (2): The limitation of FTIR calibration seem to be ignored by Kroll and Schmid-Beurmann (2020). Hydrogen is incorporated via point defects in nominally anhydrous minerals.…”

“…Point 4: It is unknown whether the relationship between Or content and unit cell volume suggested by Kroll et al (1986) is universal. The Or content of the anorthoclase reported by Yang et al (2016) is 39 rather than 41, and it has been displayed in Fig.…”