Arsenopyrite

Object/Artifact

-

Crater Rock Museum

Name/Title

Arsenopyrite

Entry/Object ID

2014.1.49

Description

Chemical Composition: Al(OH)3 Crystal System: Hexagonal System Description: Common Name: Arsenopyrite Chemistry: FeAsS Group: Sulfides Location: Yao Gan Xian, Hunan Province, China Description: Small specimen with distinct crystals of various sizes. Color is a slver-yellowish tint. Physical Charateristics: Color is a brassy white to gray. • Luster is metallic. • Transparency: Crystals are opaque. • Crystal System is orthorhombic; 2/m 2/m 2/m • Crystal Habits include prismatic crystals with a diamond cross section terminated by either a steep dome (actually two of the four faces of a prism) or a less inclined dome, also short stubby crystals doubly terminated with domes. Twinning is common, often bending the crystal and sometimes forming crosses, x's or stars. Cleavage is distinct in two directions forming prisms. • Fracture is uneven. • Hardness is 5.5 - 6. • Specific Gravity is approximately 6.1+ (heavier than average for metallic minerals) • Streak is dark gray to black • Other Characteristics: Striations on dome faces, bitter smell when powdered or broken. • Associated Minerals are gold, siderite, pyrite and other sulfides. • Notable Occurrences include Kyushu Island and Iname, Japan; Cornwall, England; Bolivia; Freiberg, Germany; Wawa area of Ontario, Canada and Valais, Switzerland. • Best Field Indicators are crystal habit, cleavage, smell when struck, color and luster. 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

2-1/2 in

Width

1-1/2 in

Length

1-1/2 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