Card No: 12428       Created: 12/11/25    Last edition: 10/04/2026

Name: REAPHOOKHILLITE
Specification: [1], structure type - parahopeite
Formula: MgZn2[PO4]2 · 4H2O
Symmetry Class: triclinic
Space Group: P 1(-)
Unit Cell
Parameters:
a = 5.7588 | b = 7.5341 | c = 5.2786 | alpha = 93.4000 | beta = 91.3000 | gamma = 91.3000
Number of Formula Unit: Z = 1Unit Cell Volume, Å3: Vc = 228.49
Number of Atomic Position
per full Unit Cell
:
P/U = 17 Molar Volume, cm3/mol: Vm = 137.63
Number of Reflexes used in
Structure Determination
:

-
X-ray density, g/cm3: p = 3.03
R-factor: -MU, 1/cm: µ = 114.163
Wave Length for Calculated
Powder Diffraction Patterns
:
Cu=1.54056Mass attenuation coefficient,
cm2/g
:
µ/p = 37.677
Theta-Interval for CPDP: T/I = 1-45