penfieldite
Sign in to savePenfieldite is a rare lead hydroxychloride mineral from the class of halides. It was named after Samuel Lewis Penfield. It has been a valid species before the founding of IMA, and was first published in 1892. It had been grandfathered, meaning the name penfieldite is still believed to refer to a valid species. When it was first described by Genth in 1892 from Laurion, Greece, the mineral had the formula of Pb3Cl4O.
Key facts
- Mineral.strunz
- 03.DC.15
- Mineral.system
- Hexagonal
- Mineral.dana
- 10.04.01.01
- Mineral.boxbgcolor
- 52b4e7
- Mineral.image
- Penfieldite-Boleite-Cotunnite-206830.jpg
- Mineral.formula
- Pb2Cl3(OH)
- Mineral.IMAsymbol
- Pfd
- Mineral.class
- Trigonal Dipyramidal H-M symbol:
- Mineral.symmetry
- P
- Mineral.unit cell
- 5,360.83
- Mineral.molweight
- 537.77
- Mineral.color
- Colorless, white, yellowish, bluish
- Mineral.cleavage
- Distinct/good on {0001}
- Mineral.mohs
- 3–4
- Mineral.luster
- Adamantine, greasy
- Mineral.opticalprop
- Uniaxial (+)
- Mineral.refractive
- nω = 2.130(1) nε = 2.210(1)
- Mineral.birefringence
- 0.080
via Wikipedia infobox
~3 min read
Encyclopedic overview
4 sectionsContents
- Properties
- Classification
- Occurrences and localities
- References
{{Infobox mineral|boxbgcolor=#52b4e7|image=Penfieldite-Boleite-Cotunnite-206830.jpg|formula=Pb2Cl3(OH)|IMAsymbol=Pfd|strunz=03.DC.15|system=Hexagonal|dana=10.04.01.01|class=Trigonal Dipyramidal H-M symbol: |symmetry=P|unit cell=5,360.83|molweight=537.77|color=Colorless, white, yellowish, bluish|cleavage=Distinct/good on {0001}|mohs=3–4|luster=Adamantine, greasy|opticalprop=Uniaxial (+)|refractive=nω = 2.130(1) nε = 2.210(1)|birefringence=0.080|streak=White|gravity=6.00|density=Measured: 5.82 – 6.61 Calculated: 6.00|solubility=Soluble in water|diaphaneity=Transparent}}
Penfieldite is a rare lead hydroxychloride mineral from the class of halides. It was named after Samuel Lewis Penfield. It has been a valid species before the founding of IMA, and was first published in 1892. It had been grandfathered, meaning the name penfieldite is still believed to refer to a valid species. When it was first described by Genth in 1892 from Laurion, Greece, the mineral had the formula of Pb3Cl4O.
Excerpted from Wikipedia’s “penfieldite” article, available under the CC BY-SA 4.0 licence.