Dypingite

Dypingite is a hydrated magnesium carbonate mineral with the formula: Mg₅(CO₃)₄(OH)₂·5H₂O. Its type locality is the Dypingdal serpentine-magnesite deposit, Snarum, Norway. Synthethic dypingite is known as heavy magnesium carbonate.

Dypingite
Dypingite (white rosettes) with other minerals, found in Spain
General
Category	Carbonate minerals
Formula	Mg5(CO3)4(OH)2·5H2O
Strunz classification	5.DA.05
Dana classification	16b.07.02.01
Crystal system	Monoclinic Unknown space group
Identification
Formula mass	485.65 g/mol
Color	White
Crystal habit	Globular - spherical to rounded forms (e.g. wavellite)
Tenacity	Brittle
Luster	Pearly
Streak	White to gray
Diaphaneity	Semitransparent
Specific gravity	2.15
Optical properties	Biaxial (+)
Refractive index	nα = 1.508 nβ = 1.510 nγ = 1.516
Birefringence	δ = 0.0080
Pleochroism	Colorless
Ultraviolet fluorescence	Fluorescent and phosphorescent, Short UV=gray blue, Long UV=light blue
References	[1][2][3]