Card No: 1753       Created: 23/12/1993    Last edition: 19/03/2020

Name: GIRVASITE
Specification: [1]
Formula: NaCa2Mg3(OH)2[H2O]4[PO4]2[PO2(OH)2][CO3]
Symmetry Class: monoclinic-beta
Space Group: P 2(1)/c
Unit Cell
Parameters:
a = 6.5220 | b = 12.2500 | c = 21.5600 | beta = 89.4800
Number of Formula Unit: Z = 4Unit Cell Volume, Å3: Vc = 1722.45
Number of Atomic Position
per full Unit Cell
:
P/U = 124 Molar Volume, cm3/mol: Vm = 259.37
Number of Reflexes used in
Structure Determination
:

NR = 853
X-ray density, g/cm3: p = 2.43
R-factor: R = 0.0570MU, 1/cm: µ = 105.765
Wave Length for Calculated
Powder Diffraction Patterns
:
Cu=1.54056Mass attenuation coefficient,
cm2/g
:
µ/p = 43.613
Theta-Interval for CPDP: T/I = 1-45