Card No: 4571       Created: 19/10/1998    Last edition: 07/02/2017

Name: STOPPANIITE
Specification: [1], structure type - beryl, DN
Formula: (Fe,Al,Mg)4[Be6Si12O36][H2O]2Na
Symmetry Class: hexagonal
Space Group: P 6/mcc
Unit Cell
Parameters:
a = 9.3970 | c = 9.2020
Number of Formula Unit: Z = 1Unit Cell Volume, Å3: Vc = 703.71
Number of Atomic Position
per full Unit Cell
:
P/U = 62 Molar Volume, cm3/mol: Vm = 423.87
Number of Reflexes used in
Structure Determination
:

NR = 314
X-ray density, g/cm3: p = 2.74
R-factor: R = 0.0410MU, 1/cm: µ = 121.263
Wave Length for Calculated
Powder Diffraction Patterns
:
Co=1.78892Mass attenuation coefficient,
cm2/g
:
µ/p = 44.182
Theta-Interval for CPDP: T/I = 1-45