Card No: 8506       Created: 14/10/12    Last edition: 12/10/2015

Name: MARIANOITE
Specification: [1], structure type - wohlerite
Formula: Na2Ca4(Nb,Zr)2[Si2O7]2(O,F)4
Symmetry Class: monoclinic-beta
Space Group: P 2(1)
Unit Cell
Parameters:
a = 10.8459 | b = 10.2260 | c = 7.2727 | beta = 109.3000
Number of Formula Unit: Z = 2Unit Cell Volume, Å3: Vc = 761.14
Number of Atomic Position
per full Unit Cell
:
P/U = 60 Molar Volume, cm3/mol: Vm = 229.23
Number of Reflexes used in
Structure Determination
:

-
X-ray density, g/cm3: p = 3.45
R-factor: R = 0.0465MU, 1/cm: µ = 284.065
Wave Length for Calculated
Powder Diffraction Patterns
:
Cu=1.54056Mass attenuation coefficient,
cm2/g
:
µ/p = 82.287
Theta-Interval for CPDP: T/I = 1-45