Carnotite

Object/Artifact

-

Crater Rock Museum

Carnotite

Carnotite

Name/Title

Carnotite

Entry/Object ID

2014.1.145

Description

Chemical Composition: K2(UO2)2(VO4)2*3H2O Crystal System: Monoclinic System Description: Common Name: Carnotite Chemistry: K2(UO2)2(VO4)2*3H2O Group: Phosphate Location: Colorado Description: A block shaped specimen appears to be petrified wood. Brown color with distinct yellow crust throughout. PHYSICAL CHARACTERISTICS: Color is bright yellow. •Luster is pearly to dull or earthy. •Transparency: Crystals are translucent to opaque. •Crystal System is monoclinic; 2/m •Crystal Habits include crusts, earthy masses, foliated and granular aggregates. •Cleavage is perfect in one direction. •Fracture is uneven. •Hardness is 2. •Specific Gravity is approximately 4 - 5 (heavy for translucent minerals), higher gravity with lower water content. •Streak is yellow. •Associated Minerals include other uranium and vanadium minerals in sandstones and limestones. •Other Characteristics: Radioactive and not fluorescent. •Notable Occurrences include many locations in Wyoming, Colorado, Arizona, Utah, Grants, New Mexico and Mauch Chunk, Carbon Co, Pennsylvania, USA; Shaba, Zaire; Morocco; Radium Hill, Australia and Kazakhstan. •Best Field Indicators are bright yellow color, density, habit, lack of any fluorescence, radioactivity and associations. Fracture: uneven Hardness: 2 Gypsum Luster: Pearly Rock Type: Sedimentary Specific Gravity: 4-5 Streak: Yellow

Collection

RAGM Mineral Collection

Acquisition

Accession

2014.1

Source or Donor

Crater Rock Museum (unknown donors)

Acquisition Method

Gift

Dimensions

Width

2 in

Depth

2-1/2 in

Length

3 in

Dimension Notes

Dimension taken at widest points

Location

Location

Wall

North

Building

Storage (old gift shop upstairs)

Category

Permanent

Moved By

Rawley Wyatt

Date

October 28, 2014

Location

Cabinet

Case#19

Wall

West

Building

Freida Hall

Category

Permanent