VS
Name
—
Pb₂[B₅O₉]Cl·0.5H₂O
Formula
—
Mineral Species
Entry type
—
Borates
Chemical class
—
Orthorhombic
Crystal system
—
4
Mohs hardness
—
5.071
Specific gravity
—
White
Streak
—
Adamantine
Luster
—
Perfect on {010}, good on {100}
Cleavage
—
Pnn2
Space group
—
Hilgardite
Structural group
—
Lsr · Approved
IMA
—
2007
Named in
—
Colorless to white
Typical colors
—
Pb · B · O · Cl · H
Elements
—