| Name: | BERTRANDITE | ||
| Specification: | [2], structure type - bertrandite | ||
| Formula: | Be4Si2O7(OH)2 | ||
| Symmetry Class: | orthorhombic | ||
| Space Group: | C mc2(1) | ||
| Unit Cell Parameters: | a = 8.7135 | b = 15.2680 | c = 4.5683 | ||
| Number of Formula Unit: | Z = 4 | Unit Cell Volume, Å3: | Vc = 607.76 |
| Number of Atomic Position per full Unit Cell: | P/U = 68 | Molar Volume, cm3/mol: | Vm = 91.52 |
| Number of Reflexes used in Structure Determination: | NR = 741 | X-ray density, g/cm3: | p = 2.60 |
| R-factor: | R = 0.0481 | MU, 1/cm: | µ = 55.882 |
| Wave Length for Calculated Powder Diffraction Patterns: | Cu=1.54056 | Mass attenuation coefficient, cm2/g: | µ/p = 21.471 |
| Theta-Interval for CPDP: | T/I = 1-45 | ||