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Mineralati

Minerals

Gananite

gananite

BiF3

Gananite: Properties and Occurrences - Assignment Point

Gananite: Properties and Occurrences - Assignment Point — via assignmentpoint.com · Source

Overview

Gananite (simplified Chinese: 赣南矿; traditional Chinese: 贛南礦; pinyin: gànnánkuàng) is a rare bismuth fluoride mineral form of bismuth trifluoride with a general formula of BiF3. Gananite is an isotropic mineral that belongs to the space group P43m. This means that gananite does not show any colors in cross polarized light, because when polarized light passes through it, it does not split into two perpendicular rays. In other words, because gananite is an isometric mineral, it does not exhibit double refraction. Moreover, this tells us that this mineral is not birefringent. Its color in plane-polarized light is blackish-brown, and it does not show pleochroism.

Scientific references

  1. Gananite — Wikidata. https://www.wikidata.org/wiki/Q3758030 Link
  2. Gananite — Wikipedia. https://en.wikipedia.org/wiki/Gananite Link