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Sign in to saveHerderite is a phosphate mineral belonging to the apatite, phosphate group, with formula CaBe(PO4)(F,OH). It forms monoclinic crystals, often twinned and variable in colour from colourless through yellow to green. It forms a series with the more common hydroxylherderite, which has more hydroxyl ion than fluoride.
Key facts
- Mineral.name
- Herderite
- Mineral.image
- Herderite-gem7-08a.jpg
- Mineral.category
- Phosphate mineral
- Mineral.formula
- CaBe(PO4)(F,OH)
- Mineral.IMAsymbol
- Hrd
- Mineral.strunz
- 8.BA.10
- Mineral.system
- Monoclinic
- Mineral.class
- Prismatic (2/m) (same H-M symbol)
- Mineral.symmetry
- P21/a
- Mineral.unit cell
- a = 4.81, b = 7.7, c = 9.82 [Å]; β = 90.1°; Z = 4
- Mineral.colour
- Colourless, pale yellow, greenish-white
- Mineral.habit
- Occurs as prismatic tabular crystals, pseudo-orthorhombic or pseudo-hexagonal; fibrous botryoidal to spheroidal aggregates
- Mineral.twinning
- On {100} or {001} as fishtail contact
- Mineral.cleavage
- Indistinct on {110}
- Mineral.fracture
- Subconchoidal
- Mineral.mohs
- 5 - 5.5
- Mineral.lustre
- Vitreous
- Mineral.diaphaneity
- Transparent - translucent
via Wikipedia infobox
Wikidata facts
- Named after
- Siegmund August Wolfgang von Herder
- Image
- Herderite-mrz102a.jpg
Show 7 more facts
- Nickel-Strunz 9th edition (updated 2009)
- 8.BA.10
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 8.BA.10
- Strunz 8th edition (series ID, updated)
- VII/B.01
- crystal system
- monoclinic crystal system
- Commons category
- Herderite
- IMA Mineral Symbol
- Hrd
- chemical formula
- CaBePO₄(F,OH)
Sources (1)
via Wikidata · CC0