Card No: 12300       Created: 15/05/25    Last edition: 06/04/2026

Name: ERMELOITE
Specification: [1], structure type - kieserite
Formula: AlPO4 · H2O
Symmetry Class: monoclinic-beta
Space Group: C 2/c
Unit Cell
Parameters:
a = 6.5371 | b = 7.5670 | c = 7.1146 | beta = 115.3000
Number of Formula Unit: Z = 4Unit Cell Volume, Å3: Vc = 318.08
Number of Atomic Position
per full Unit Cell
:
P/U = 36 Molar Volume, cm3/mol: Vm = 47.90
Number of Reflexes used in
Structure Determination
:

NR = 367
X-ray density, g/cm3: p = 2.92
R-factor: R = 0.0310MU, 1/cm: µ = 94.506
Wave Length for Calculated
Powder Diffraction Patterns
:
Cu=1.54056Mass attenuation coefficient,
cm2/g
:
µ/p = 32.345
Theta-Interval for CPDP: T/I = 1-45