Table 2. Calculated Unit Cell Parameters for the Surface-Induced Phase of Tyrian Purple on Chemically Cleaned and Plasma-Etched Silicon Oxide.

	chemically cleaned SiO2	plasma-etched SiO2
a [Å]	3.86	3.84
b [Å]	5.83	6.00
c [Å]	14.86	14.67
α [deg]	98.2	94.0
β [deg]	94.2	93.0
γ [deg]	87.1	87.0
V [Å3]	328.87	336.31