پیروفیلیت
Sign in to savePyrophyllite is a phyllosilicate mineral composed of aluminium silicate hydroxide: Al2Si4O10(OH)2. It occurs in two forms (habits): crystalline folia and compact masses; distinct crystals are not known.
Key facts
- Mineral.name
- Pyrophyllite
- Mineral.category
- Phyllosilicate minerals
- Mineral.group
- Pyrophyllite-Talc group
- Mineral.boxbgcolor
- dfce9d
- Mineral.image
- Pyrophyllite-118706.jpg
- Mineral.imagesize
- 260px
- Mineral.caption
- Pearly radial cluster of pyrophyllite from Hillsborough District, Orange County, North Carolina (Size: 11 × 7.3 × 6.6 cm)
- Mineral.formula
- Al2Si4O10(OH)2
- Mineral.IMAsymbol
- Prl
- Mineral.molweight
- 360.31 g/mol
- Mineral.system
- Monoclinic or triclinic
- Mineral.class
- Prismatic (2/m) or pinacoidal ()
- Mineral.symmetry
- C2/c or C
- Mineral.unit cell
- a = 5.16 Å, b = 8.966(3) Å, c = 9.347(6) Å; α = 91.18°, β = 100.46°, γ = 89.64°; Z = 2
- Mineral.color
- Brown green, brownish yellow, greenish, gray green, gray white
- Mineral.habit
- Compact spherulitic aggregates of needlelike radiating crystals; as fine grained foliated laminae, granular, massive
- Mineral.cleavage
- [001] Perfect
- Mineral.tenacity
- Flexible inelastic
via Wikipedia infobox