| Name: | JOHNWALKITE | ||
| Specification: | [1] | ||
| Formula: | K2(Mn,Fe)4(Nb,Ta)2O4[PO4]4 · 4H2O | ||
| Symmetry Class: | orthorhombic | ||
| Space Group: | P b2(1)m | ||
| Unit Cell Parameters: | a = 7.5160 | b = 10.0230 | c = 6.5020 | ||
| Number of Formula Unit: | Z = 1 | Unit Cell Volume, Å3: | Vc = 489.81 |
| Number of Atomic Position per full Unit Cell: | P/U = 36 | Molar Volume, cm3/mol: | Vm = 295.03 |
| Number of Reflexes used in Structure Determination: | - | X-ray density, g/cm3: | p = 3.57 |
| R-factor: | - | MU, 1/cm: | µ = 338.255 |
| Wave Length for Calculated Powder Diffraction Patterns: | Co=1.78892 | Mass attenuation coefficient, cm2/g: | µ/p = 94.807 |
| Theta-Interval for CPDP: | T/I = 1-45 | ||