Brazilianite

Object/Artifact

-

Crater Rock Museum

Name/Title

Brazilianite

Entry/Object ID

2014.1.22

Description

Chemical Composition: Al(OH)3 Crystal System: Hexagonal System Description: Common Name: Brazilianite Chemistry: NaAl3(PO4)2(OH)4 Group: Phosphates Location: Corrego Frio Pegmatite, near Conselliteiro Pena, Minas Gerais, Brazil Description: Small specimen with light green and white crystals with no apparent symmetry. Physical Charateristics: •Color is yellow to greenish yellow and colorless. •Luster is vitreous. •Transparency: Crystals are transparent to translucent. •Crystal System: Monoclinic; 2/m •Crystal Habits include complex short prismatic and wedge shaped crystals that seem to lack any symmetry. Crystals are very common, and massive examples are almost unknown. •Cleavage is perfect in one direction. •Fracture is conchoidal. •Hardness is 5.5 •Specific Gravity is approximately 3.0 (average for translucent minerals) •Streak is white. •Other Characteristics: Crystals are striated and the index of refraction is 1.60 - 1.62 •Associated Minerals are quartz, feldspars, muscovite and primary and secondary phosphates associated with phosphate rich pegmatites. •Notable Occurrences include Conselheiro Pena and other mines in Minas Gerias, Brazil and Smith Mine, Newport, New Hampshire. •Best Field Indicators are color, crystal habits, low density and cleavage. Hardness: 7 Quartz Rock Type: Sedimentary

Collection

RAGM Mineral Collection

Acquisition

Accession

2014.1

Source or Donor

Crater Rock Museum (unknown donors)

Acquisition Method

Gift

Dimensions

Height

2-1/8 in

Width

1-1/8 in

Length

1-3/4 in

Location

Location

Display Case

FS-11

Room

Frieda Smith Hall

Building

Crater Rock Museum

Category

Permanent

Moved By

Curtis Gardner

Date

December 27, 2023