| Name: | TOURMALINE | ||
| Specification: | [17], structure type - tourmaline, DN | ||
| Formula: | (Na,Ca)0.7(Al,Li,Mn)3Al6(Si,Al)6O18[BO3]3(OH,O)4 | ||
| Symmetry Class: | trigonal | ||
| Space Group: | R 3m | ||
| Unit Cell Parameters: | a = 15.8313 | c = 7.1842 | ||
| Number of Formula Unit: | Z = 3 | Unit Cell Volume, Å3: | Vc = 1559.35 |
| Number of Atomic Position per full Unit Cell: | P/U = 159 | Molar Volume, cm3/mol: | Vm = 313.09 |
| Number of Reflexes used in Structure Determination: | NR = 1733 | X-ray density, g/cm3: | p = 2.99 |
| R-factor: | R = 0.0166 | MU, 1/cm: | µ = 136.353 |
| Wave Length for Calculated Powder Diffraction Patterns: | Co=1.78892 | Mass attenuation coefficient, cm2/g: | µ/p = 45.573 |
| Theta-Interval for CPDP: | T/I = 1-45 | ||