گرینوکیت
Sign in to saveGreenockite, also cadmium blende or cadmium ochre (obsolete) is a rare cadmium bearing metal sulfide mineral consisting of cadmium sulfide (CdS) in crystalline form. Greenockite crystallizes in the hexagonal system. It occurs as massive encrustations and as hemimorphic six-sided pyramidal crystals which vary in color from a honey yellow through shades of red to brown. The Mohs hardness is 3 to 3.5 and the specific gravity is 4.8 to 4.9.
Key facts
- Mineral.Jmol
- [CdH2-2]1[SH+2]([CdH2-2]6)[CdH2-2][SH+2]7[CdH-2]2[S+2][Cd-2]3([S+2][CdH-2]9[S+2]5)[S+2]18[Cd-2]45[S+2][CdH-2]5[SH+2]6[Cd-2]78[S+2]78[CdH2-2][SH+2]5[CdH2-2][S+2]4([CdH2-2][SH+2]9[CdH2-2]4)[CdH-2]7[S+2]34[CdH2-2][SH+2]2[CdH2-2]8
- Mineral.pleochroism
- Weak
- Mineral.name
- Greenockite
- Mineral.category
- Sulfide mineral
- Mineral.image
- Greenockite-259580.jpg
- Mineral.imagesize
- 260px
- Mineral.caption
- Greenockite crystals from Tsumeb Mine, Namibia (Picture width 1 mm)
- Mineral.formula
- CdS
- Mineral.IMAsymbol
- Gnk
- Mineral.molweight
- 144.48
- Mineral.strunz
- 2.CB.45
- Mineral.system
- Hexagonal
- Mineral.class
- Dihexagonal pyramidal (6mm) (same H-M symbol)
- Mineral.symmetry
- P63mc
- Mineral.unit cell
- a = 4.136 c = 6.713 [Å]; Z = 2
- Mineral.color
- Honey yellow, citron yellow, orange yellow
- Mineral.habit
- Colloform – forming from a gel or colloidal mass; encrustations – forms crust-like aggregates on matrix; radial – crystals radiate from a center without producing stellar forms (e.g. stibnite)
- Mineral.twinning
- Rare on {112} forming trillings
via Wikipedia infobox
Wikidata facts
- Named after
- Charles Cathcart, 2nd Earl Cathcart
- Image
- Greenockite-259580.jpg
Show 8 more facts
- type locality (geology)
- Strathclyde
- crystal system
- hexagonal crystal system
- Commons category
- Greenockite
- chemical formula
- CdS
- Nickel-Strunz 9th edition (updated 2009)
- 2.CB.45
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 2.CB.45
- IMA Mineral Symbol
- Gnk
- Strunz 8th edition (series ID, updated)
- II/B.06
Sources (1)
via Wikidata · CC0