Name: | JOHNWALKITE | ||

Specification: | [1] | ||

Formula: | K_{2}(Mn,Fe)_{4}(Nb,Ta)_{2}O_{4}[PO_{4}]_{4} · 4H_{2}O | ||

Symmetry Class: | orthorhombic | ||

Space Group: | P b2(1)m | ||

Unit CellParameters: | a = 7.5160 | b = 10.0230 | c = 6.5020 | ||

Number of Formula Unit: | Z = 1 | Unit Cell Volume, Å: ^{3} | V = 489.81_{c} |

Number of Atomic Position: per full Unit Cell | P/U = 36 | Molar Volume, cm: ^{3}/mol | V = 295.03_{m} |

Number of Reflexes used in: Structure Determination | - | X-ray density, g/cm^{3}: | p = 3.57 |

R-factor: | - | MU, 1/cm: | µ = 338.255 |

Wave Length for Calculated: Powder Diffraction Patterns | Co=1.78892 | Mass attenuation coefficient,: cm ^{2}/g | µ/p = 94.807 |

Theta-Interval for CPDP: | T/I = 1-45 |