Orthoclase [ KAlSi3O8 ]

Images of Orthoclase

Material properties

Formula KAlSi3O8
Abbreviation Or
Classification K feldspar
Luminescence emitters AlO4, Al-O- -Al, Exsolution features, Fe, Mn, Pb, Si-O, Triplet-singlet
Spectra Luminescence (1)
IMA Status Approved (IMA 1962 s.p.)
Search other databases webmineral.com, mindat.org, rruf.info, fluomin.org, mineralienatlas.de, Handbook of Mineralogy, American Mineralogist Crystal Structure Database
Related materials Microcline
Tags Mineral, Aluminosilicate

Composition

Element Atoms
K 1
O 8
Al 1
Si 3
Total: 13

References for Orthoclase

Reference
Lines Spectra Images
Götze 2000c 2 1 1
Laukamp et al. 2021 2 0 0
Rendell & Clarke 1997 1 0 0
Tarashchan 1978 6 0 0

Specimens of Orthoclase

Name Owner Materials Phase purity Image Spectra Techniques
M1284 Orthoclase CSIRO Albite, Ca, Microcline, Muscovite-2M1, Orthoclase (86.9%), Quartz 86.9 0 —
M2253 Covellite / Orthoclase / Chalcopyrite CSIRO Chalcanthite, Chalcopyrite, Covellite, Muscovite-1M, Muscovite-2M1, Orthoclase (16.0%), Quartz 16.0 0 —
API13 Kaolinite / Halloysite CSIRO Albite, Halloysite, hkl, Illite-Smectite 12.0A, Kaolinite, Montmorillonite, Orthoclase (7.9%), Quartz 7.9 0 —
M0762 Goethite CSIRO Goethite, Kaolinite, Muscovite-1M, Muscovite-2M1, Orthoclase (7.1%), Quartz 7.1 0 —
CP054 Quartz / Spodumene / Albite CSIRO Albite, Microcline, Muscovite-2M1, Orthoclase (7.0%), Quartz, Spodumene 7.0 0 —
MES124 Microcline / Hambergite / Albite CSIRO Albite, Ankerite, Cookeite, Hambergite, F, Microcline, Orthoclase (7.0%), Quartz 7.0 0 —
M1296 Petalite / Microcline CSIRO Albite, Ca, Microcline, Muscovite-2M1, Orthoclase (5.8%), Petalite, Quartz 5.8 1 Reflectance
NR62 Microcline / Albite CSIRO Albite, Microcline, Orthoclase (5.0%), Quartz 5.0 0 —
MT8367 Fluorapatite / Quartz / Triploidite CSIRO Fluorapatite, Orthoclase (4.0%), Potassic-ferro-richterite, Quartz, Triploidite 4.0 0 —
Swy-2 Montmorillonite CSIRO Montmorillonite, Orthoclase (3.5%), Quartz 3.5 0 —
M2101 Pollucite CSIRO Orthoclase (3.0%), Pollucite, Quartz 3.0 1 Reflectance
MES123 Pollucite CSIRO Orthoclase (3.0%), Pollucite, Quartz 3.0 1 Reflectance
Swy-1 Montmorillonite CSIRO Montmorillonite, Orthoclase (2.8%), Quartz 2.8 0 —
MES200 Quartz CSIRO Dolomite, Labradorite, Microcline, Orthoclase (2.0%), Quartz 2.0 0 —
MES201 Quartz / Calcite / Aragonite CSIRO Albite, Ca, Aragonite, Calcite, Microcline, Orthoclase (2.0%), Quartz 2.0 0 —
46E3372 Grossular CSIRO Albite, Albite, Ca, Fluorapatite, Grossular, Orthoclase (1.8%), Quartz, Titanite 1.8 0 —
MES119 Augite / Labradorite / Anorthoclase CSIRO Anorthoclase, Armalcolite, Augite, Hematite, Labradorite, Orthoclase (1.8%) 1.8 0 —