Formula: Ca₆(Al,Si)₂(SO₄)₂[B(OH)₄](OH,O)₁₂ · 26H₂O

Species: Sulfates

Colour: Colorless, white

Lustre: Sub-Vitreous, Waxy, Dull

Hardness: 2½

Specific Gravity: 1.77

Crystal System: Trigonal

Member of: Ettringite Group

Name: Named in 1983 by Pete J. Dunn, Donald R. Peacor, Peter B. Leavens, and Jack Leach Baum in honor of Dr. Charles Palache (1869-1954), systematic mineralogist, specialist on minerals of the Franklin District, Professor of Mineralogy at Harvard University, Cambridge, Massachusetts, USA.
Type Locality: Franklin Mine, Franklin, Franklin Mining District, Sussex County, New Jersey – USA