| Name: | PARGASITE | ||
| Specification: | [1], DF | ||
| Formula: | (Na,K)Ca2(Mg,Fe)4Al[Si6Al2O22](OH)2 | ||
| Symmetry Class: | monoclinic-beta | ||
| Space Group: | C 2/m | ||
| Unit Cell Parameters: | a = 9.9100 | b = 18.0220 | c = 5.3120 | beta = 105.7800 | ||
| Number of Formula Unit: | Z = 2 | Unit Cell Volume, Å3: | Vc = 912.96 |
| Number of Atomic Position per full Unit Cell: | P/U = 82 | Molar Volume, cm3/mol: | Vm = 274.95 |
| Number of Reflexes used in Structure Determination: | - | X-ray density, g/cm3: | p = 3.17 |
| R-factor: | R = 0.4300 | MU, 1/cm: | µ = 213.269 |
| Wave Length for Calculated Powder Diffraction Patterns: | Co=1.78892 | Mass attenuation coefficient, cm2/g: | µ/p = 67.306 |
| Theta-Interval for CPDP: | T/I = 1-45 | ||