Pyrrhotite

Object/Artifact

-

Crater Rock Museum

Pyrrhotite

Pyrrhotite

Name/Title

Pyrrhotite

Entry/Object ID

2014.1.24

Description

Chemical Composition: Al(OH)3 Crystal System: Hexagonal System Description: Common Name: Pyrrhotite Chemistry: Fe1-xS (x=0 to x=0.2) Group: Sulfides Location: Unknown Description: Small specimen with small, black columnar structures. Physical Charateristics: •Color is bronze. •Luster is metallic. •Transparency crystals are opaque. •Crystal System hexagonal, 6/m2/m2/m and monoclinic; 2/m •Crystal Habits: tabular or prismatic in hexagonal prisms with a pinacoidal termination, but mostly massive rock forming beds with other sulfides. •Cleavage none but there is a strong parting tendency. •Fracture is uneven •Hardness is 3.5-4.5 •Specific Gravity is 4.6 •Streak gray-black •Associated Minerals pentlandite, quartz, ankerite, pyrite and other sulfides. •Other Characteristics: weakly magnetic, prism faces striated parallel to pinacoid faces and color will darken with exposure to light. •Notable Occurances Sudbury, Ontario; Ducktown, Tennessee; Chihuahua, Mexico; Russia; Germany and Brazil. •Best Field Indicators magnetism, crystal habit, hardness and color. 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

2-1/4 in

Width

3/4 in

Length

1-3/8 in

Location

Location

Display Case

FS-11

Room

Frieda Smith Hall

Building

Crater Rock Museum

Date

July 22, 2023