Mineralpedia Details for Rabbittite

Named for John Charles Rabbitt who was a Chief of the Trace Elements Section at the United States Geological Survey. Rabbittite can be found in Utah in the United States and at Jachymov in the Czech Republic, as well as purportedly in Russia. It is a secondary mineral likely of post-mine origin. It can be found associated with sodium-zippeite, magnesium-zippeite, fourmarieite, gypsum, bieberite, and cobaltoan calcite. Rabbittite is radioactive. It will slowly dissolve in water at fluoresces a pastel yellow color under short-wave ultraviolet light.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at  http://www.handbookofmineralogy.org/pdfs/rabbittite.pdf

Formula

Ca₃Mg₃(UO₂)₂(CO₃)₆(OH)₄·18H₂O 

Crystal System

Monoclinic 

Crystal Habit

Efflorescences, Fibrous, Acicular 

Cleavage

Perfect, Perfect, Perfect 

Luster

Silky 

Color

pale green, greenish yellow 

Class

Monoclinic 

Fracture

Brittle 

Hardness

2.5 

WebMineral

View Rabbittite 

Mindat

View Rabbittite 

Fine yellow, acicular sprays to about 1mm.