Distinct/Good on {001} (microscopically observable)
Mohs scale hardness
2.5 – 3.5
Luster
Vitreous, waxy, may be dull to earthy
Streak
Grey
Diaphaneity
Opaque to transparent in small grains
Specific gravity
6.7 – 7.4 measured, 8.15 calculated
Optical properties
Biaxial (−) (appears uniaxial due to twinning)
Refractive index
a=2.12–2.15, b=2.12–2.15, g=2.28
Birefringence
0.1300–0.1600
2V angle
45
References
[2][3][4][5]
Bismutite or bismuthite is a bismuth carbonate mineral with formula Bi2(CO3)O2 (bismuth subcarbonate). Bismutite occurs as an oxidation product of other bismuth minerals such as bismuthinite and native bismuth in hydrothermal veins and pegmatites.[3] It crystallizes in the orthorhombic system and typically occurs as earthy to fibrous masses.[2]
It was first described in 1841 for an occurrence in Saxony.[2]
The term bismuthite has been used in the past for bismuthinite.[6]
Bismutite or bismuthite is a bismuth carbonate mineral with formula Bi2(CO3)O2 (bismuth subcarbonate). Bismutite occurs as an oxidation product of other...
oxidation state. Bismuth subcarbonate occurs naturally as the mineral bismutite. Its structure consists of Bi–O layers and CO3 layers and is related to...
Germany. Bismuth trioxide – details on the chemistry of this substance Bismutite Bismuthinite Bismoclite Eulytine Warr, L.N. (2021). "IMA–CNMNC approved...
technological problem, which several research teams worked on in the 2010s. Bismutite Bismuthinite Bismoclite Bismite Zavaritskite Eulytine (A valid IMA mineral...
association with granite pegmatite and in greisen. Associated minerals include bismutite, mica, jarosite, alunite, cerussite, atacamite, connellite. Occurrences...
in the oxidized zones of copper deposits. Associated minerals include: bismutite, smaltite, native bismuth, atelestite, erythrite, malachite and barite...
minerals, and as such, it occurs with other bismuth-bearing minerals such as bismutite, bismutotantalite, bismuth, kettnerite, and other minerals in pegmatite...
bismuth and bismuthinite, the mineral can also occur in paragenesis with bismutite and gold, among others. As a rare mineral formation, zavaritskite has...