برتراندیت
Sign in to saveBertrandite is a beryllium sorosilicate hydroxide mineral with composition: Be4Si2O7(OH)2. Bertrandite is a colorless to pale yellow orthorhombic mineral with a hardness of 6–7.
Key facts
- Mineral.name
- Bertrandite
- Mineral.image
- Bertrandite-38545.jpg
- Mineral.caption
- Bertrandite from the Golconda pegmatite, Minas Gerais, Brazil
- Mineral.category
- Sorosilicate
- Mineral.formula
- Be4Si2O7(OH)2
- Mineral.IMAsymbol
- Btd
- Mineral.strunz
- 9.BD.05
- Mineral.system
- Orthorhombic
- Mineral.class
- Pyramidal (mm2) H-M symbol: (mm2)
- Mineral.symmetry
- Ccm21
- Mineral.unit cell
- a = 8.7135(4) Å, b = 15.268(1) Å, c = 4.5683(3) Å; Z = 4
- Mineral.color
- Colorless to pale yellow
- Mineral.habit
- Thin tabular, prismatic to needle-like crystals commonly in radial clusters
- Mineral.twinning
- Common on {011} or {021} forming heart- or V-shaped twins
- Mineral.cleavage
- Perfect on {001}; distinct on {100}, {010} and {110}
- Mineral.mohs
- 6–7
- Mineral.luster
- Vitreous, pearly on cleavage surfaces
- Mineral.diaphaneity
- Transparent
via Wikipedia infobox
Wikidata facts
- Subclass of
- sorosilicates
- Named after
- Émile Bertrand
- Image
- Bertrandite-118734.jpg
Show 7 more facts
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 9.BD.05
- Nickel-Strunz 9th edition (updated 2009)
- 9.BD.05
- Commons category
- Bertrandite
- crystal system
- orthorhombic crystal system
- IMA Mineral Symbol
- Btd
- chemical formula
- Be₄Si₂O₇(OH)₂
- Strunz 8th edition (series ID, updated)
- VIII/B.07
Sources (2)
via Wikidata · CC0
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