| Name: | OMPHACITE | ||
| Specification: | [3], "distorted" structure type - omphacite | ||
| Formula: | (Ca,Na)(Mg,Al,Fe)Si2O6 | ||
| Symmetry Class: | monoclinic-beta | ||
| Space Group: | P 2 | ||
| Unit Cell Parameters: | a = 9.5560 | b = 8.7620 | c = 5.2450 | beta = 106.8700 | ||
| Number of Formula Unit: | Z = 4 | Unit Cell Volume, Å3: | Vc = 420.26 |
| Number of Atomic Position per full Unit Cell: | P/U = 40 | Molar Volume, cm3/mol: | Vm = 63.29 |
| Number of Reflexes used in Structure Determination: | NR = 830 | X-ray density, g/cm3: | p = 3.40 |
| R-factor: | R = 0.0800 | MU, 1/cm: | µ = 237.014 |
| Wave Length for Calculated Powder Diffraction Patterns: | Co=1.78892 | Mass attenuation coefficient, cm2/g: | µ/p = 69.615 |
| Theta-Interval for CPDP: | T/I = 1-45 | ||