A Geoscience Digital Image Library

DescriptionBrookite is a polymorph with two other minerals. The minerals rutile and anatase, as well as brookite, all have the same chemistry, TiO2, but they have different structures. At higher temperatures, about 750 degrees Celsius, brookite will automatically revert to the rutile structure. Rutile is the more common and the more well known mineral of the three. Brookite shares many of the same properties as rutile such as color and luster and some properties are nearly the same such as hardness and density. However, due to structural differences brookite and rutile differ in crystal habit and cleavage.
LocationUSA ▹ Arkansas. Near Magnet Cove.
PhotographerNessa Eull. 2001-09-20.
CollectionUniversity of North Dakota Mineralogy Collection #480.
Key wordsBrookite, Arkansas
Tech details414 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens.
GeoDIL number1566