| Name: | GEHLENITE | ||
| Specification: | [16], structure type - melilite | ||
| Formula: | Ca2Al(Si,Al)2O7 | ||
| Symmetry Class: | tetragonal | ||
| Space Group: | P 4(-)2(1)m | ||
| Unit Cell Parameters: | a = 7.7404 | c = 5.0388 | ||
| Number of Formula Unit: | Z = 2 | Unit Cell Volume, Å3: | Vc = 301.89 |
| Number of Atomic Position per full Unit Cell: | P/U = 24 | Molar Volume, cm3/mol: | Vm = 90.92 |
| Number of Reflexes used in Structure Determination: | NR = 427 | X-ray density, g/cm3: | p = 3.02 |
| R-factor: | R = 0.0212 | MU, 1/cm: | µ = 206.680 |
| Wave Length for Calculated Powder Diffraction Patterns: | Cu=1.54056 | Mass attenuation coefficient, cm2/g: | µ/p = 68.402 |
| Theta-Interval for CPDP: | T/I = 1-45 | ||