| Name: | PIEMONTITE | ||
| Specification: | [1], structure type - epidote, at 25oC | ||
| Formula: | [Ca1.8Sr0.2][Al1.91Fe0.33Mn0.82][SiO4]3(OH) | ||
| Symmetry Class: | monoclinic-beta | ||
| Space Group: | P 2(1)/m | ||
| Unit Cell Parameters: | a = 8.8840 | b = 5.6840 | c = 10.2020 | beta = 115.2300 | ||
| Number of Formula Unit: | Z = 2 | Unit Cell Volume, Å3: | Vc = 466.02 |
| Number of Atomic Position per full Unit Cell: | P/U = 44 | Molar Volume, cm3/mol: | Vm = 140.35 |
| Number of Reflexes used in Structure Determination: | NR = 6636 | X-ray density, g/cm3: | p = 3.53 |
| R-factor: | R = 0.0410 | MU, 1/cm: | µ = 265.501 |
| Wave Length for Calculated Powder Diffraction Patterns: | Co=1.78892 | Mass attenuation coefficient, cm2/g: | µ/p = 75.158 |
| Theta-Interval for CPDP: | T/I = 1-45 | ||