Log InRegister
Quick Links : The Mindat ManualThe Rock H. Currier Digital LibraryMindat Newsletter [Free Download]
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsThe Rock H. Currier Digital LibraryGeologic Time
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsClubs & OrganizationsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral Quiz
Photo SearchPhoto GalleriesSearch by ColorNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

K Feldspar

A group of related mineral species
This page is currently not sponsored. Click here to sponsor this page.
Hide all sections | Show all sections

About K FeldsparHide

Potassium-dominant feldspars with variable crystal symmetry and Al-Si ordering state; they are a subgroup of Alkali feldspars which form a structural series from fully ordered, triclinic Microcline through partially ordered Orthoclase to completely disordered, monoclinic Sanidine.



Unique IdentifiersHide

Mindat ID:
9581
Long-form identifier:
mindat:1:1:9581:1
GUID
(UUID V4):
70476d8b-6520-402f-b255-965e9d2b17c3

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

SymbolSourceReference
KfsIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
KfsKretz (1983)Kretz, R. (1983) Symbols of rock-forming minerals. American Mineralogist, 68, 277–279.
KfsSiivolam & Schmid (2007)Siivolam, J. and Schmid, R. (2007) Recommendations by the IUGS Subcommission on the Systematics of Metamorphic Rocks: List of mineral abbreviations. Web-version 01.02.07. IUGS Commission on the Systematics in Petrology. download
KfsWhitney & Evans (2010)Whitney, D.L. and Evans, B.W. (2010) Abbreviations for names of rock-forming minerals. American Mineralogist, 95, 185–187 doi:10.2138/am.2010.3371
KfsThe Canadian Mineralogist (2019)The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download
KfsWarr (2020)Warr, L.N. (2020) Recommended abbreviations for the names of clay minerals and associated phases. Clay Minerals, 55, 261–264 doi:10.1180/clm.2020.30

Physical Properties of K FeldsparHide

Transparency:
Transparent, Translucent

Age distributionHide

Recorded ages:
Mesoproterozoic to Paleogene : 1085 ± 28 Ma to 31 ± 1 Ma - based on 35 recorded ages.

Crystal StructureHide

Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File    Best | x | y | z | a | b | c
Rotation
Stop | Start
Labels
Console Off | On | Grey | Yellow
IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0019651OrthoclaseViswanathan K, Kielhorn H M (1983) Al,Si distribution in a ternary (Ba,K,Na)-feldspar as determined by crystal structure refinement American Mineralogist 68 122-1241983Yugoslavia0293
0000166OrthoclaseColville A A, Ribbe P H (1968) The crystal structure of an adularia and a refinement of the structure of orthoclase American Mineralogist 53 25-371968St. Gotthard, Switzerland, known as Spencer B, variety adularia0293
0000167OrthoclaseColville A A, Ribbe P H (1968) The crystal structure of an adularia and a refinement of the structure of orthoclase American Mineralogist 53 25-371968St. Gotthard, Switzerland, known as Spencer C0293
0000313OrthoclasePhillips M W, Ribbe P H (1973) The structures of monoclinic potassium-rich feldspars American Mineralogist 58 263-2701973St. Gotthard, Switzerland0293
0000320OrthoclasePrince E, Donnay G, Martin R F (1973) Neutron diffraction refinement of an ordered orthoclase structure American Mineralogist 58 500-5071973Himalaya mine, California, USA0293
0020509OrthoclaseAngel R J, Ross N L, Zhao J, Sochalski-Kolbus L, Kruger H, Schmidt B C (2013) Structural controls on the anisotropy of tetrahedral frameworks: the example of monoclinic feldspars European Journal of Mineralogy 25 597-6142013Unknown0293
0020540OrthoclaseAngel R J, Ross N L, Zhao J, Sochalski-Kolbus L, Kruger H, Schmidt B C (2013) Structural controls on the anisotropy of tetrahedral frameworks: the example of monoclinic feldspars European Journal of Mineralogy 25 597-6142013Unknown0293
0020541OrthoclaseAngel R J, Ross N L, Zhao J, Sochalski-Kolbus L, Kruger H, Schmidt B C (2013) Structural controls on the anisotropy of tetrahedral frameworks: the example of monoclinic feldspars European Journal of Mineralogy 25 597-6142013Unknown0293
0020542OrthoclaseAngel R J, Ross N L, Zhao J, Sochalski-Kolbus L, Kruger H, Schmidt B C (2013) Structural controls on the anisotropy of tetrahedral frameworks: the example of monoclinic feldspars European Journal of Mineralogy 25 597-6142013Unknown0293
0020543OrthoclaseAngel R J, Ross N L, Zhao J, Sochalski-Kolbus L, Kruger H, Schmidt B C (2013) Structural controls on the anisotropy of tetrahedral frameworks: the example of monoclinic feldspars European Journal of Mineralogy 25 597-6142013Unknown0600
0020544OrthoclaseAngel R J, Ross N L, Zhao J, Sochalski-Kolbus L, Kruger H, Schmidt B C (2013) Structural controls on the anisotropy of tetrahedral frameworks: the example of monoclinic feldspars European Journal of Mineralogy 25 597-6142013Unknown0900
0020545OrthoclaseAngel R J, Ross N L, Zhao J, Sochalski-Kolbus L, Kruger H, Schmidt B C (2013) Structural controls on the anisotropy of tetrahedral frameworks: the example of monoclinic feldspars European Journal of Mineralogy 25 597-6142013Unknown01075
0007928OrthoclaseTseng H-Y, Heaney P J, Onstott T C (1995) Characterization of lattice strain induced by neutron irradiation Physics and Chemistry of Minerals 22 399-40519950293
0007929OrthoclaseTseng H-Y, Heaney P J, Onstott T C (1995) Characterization of lattice strain induced by neutron irradiation Physics and Chemistry of Minerals 22 399-40519950293
0007930OrthoclaseTseng H-Y, Heaney P J, Onstott T C (1995) Characterization of lattice strain induced by neutron irradiation Physics and Chemistry of Minerals 22 399-40519950293
0020547OrthoclaseJones J B, Taylor W H (1961) The structure of orthoclase Acta Crystallographica 14 443-4561961Mogok, Upper Burma0293
0020550OrthoclaseDal Negro A, De Pieri R, Quareni S (1978) The crystal structures of nine K feldspars from the Adamello Massif (Northern Italy) Acta Crystallographica B34 2699-27071978Adamello Massif, Northern Italy0293
0020551OrthoclaseDal Negro A, De Pieri R, Quareni S (1978) The crystal structures of nine K feldspars from the Adamello Massif (Northern Italy) Acta Crystallographica B34 2699-27071978Adamello Massif, Northern Italy0293
0020552OrthoclaseDal Negro A, De Pieri R, Quareni S (1978) The crystal structures of nine K feldspars from the Adamello Massif (Northern Italy) Acta Crystallographica B34 2699-27071978Adamello Massif, Northern Italy0293
0020553OrthoclaseFenn P M, Brown G E (1977) Crystal structure of a synthetic, compositionally intermediate, hypersolvus alkali feldspar: evidence for Na, K site ordering Zeitschrift fur Kristallographie 145 124-1451977Synthetic0293
0020546OrthoclaseGering E (1985) Silizium/Aluminium-Ordnung und Kristallperfektion von Sanidinen Dissertation Kernforshungszentrum Karlsruhe 1 1-971985Madagascar0293
0018075OrthoclaseChao S, Hargreaves A, Taylor W (1940) The structure of orthoclase. _cod_database_code 1011205 Mineralogical Magazine 25 498-51219400293
0020548OrthoclaseKimata M, Saito S, Shimizu M, Iida I, Matsui T (1996) Low-temperature structures of orthoclase and sanidine Neues Jahrbuch fur Mineralogie, Abhandlungen 171 199-2131996Itrongay, Madagascar0121
0020549OrthoclaseKimata M, Saito S, Shimizu M, Iida I, Matsui T (1996) Low-temperature structures of orthoclase and sanidine Neues Jahrbuch fur Mineralogie, Abhandlungen 171 199-2131996Itrongay, Madagascar0293
CIF Raw Data - click here to close

Synonyms of K FeldsparHide

Other Language Names for K FeldsparHide

Simplified Chinese:钾长石

Varieties of K FeldsparHide

AdulariaA more ordered low-temperature variety of Orthoclase or partially disordered Microcline. Individual localities should be verified because the adularia structural state is nearly equally represented by microcline and orthoclase specimens. Generally found i...
Barium-AdulariaFeldspar group.

Originally reported from Isagosawa mine, Morioka, Iwate Prefecture, Tohoku Region, Honshu Island, Japan.
Barium-bearing Feldspar
ValencianiteA variety of Adularia.
Originally described from Valenciana Mine, Guanajuato, Mun. de Guanajuato, Guanajuato, Mexico.

Relationship of K Feldspar to other SpeciesHide

Other Members of this group:
Anorthoclase(Na,K)AlSi3O8Tric.
FerrisanidineK[Fe3+Si3O8]Mon. 2/m : B2/m
Hyalophane(K,Ba)[Al(Si,Al)Si2O8]Mon.
RubiclineRb(AlSi3O8)Mon. 2/m : B2/m
Group Members:
Orthoclase K(AlSi3O8)Mon. 2/m : B2/m

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

K Feldspar in petrologyHide

An essential component of rock names highlighted in red, an accessory component in rock names highlighted in green.

Internet Links for K FeldsparHide

References for K FeldsparHide

Reference List:

Localities for K FeldsparHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListShow

This section is currently hidden. Click the show button to view.
 
Mineral and/or Locality  
Mindat Discussions Facebook Logo Instagram Logo Discord Logo
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2024, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: April 27, 2024 05:54:58 Page updated: April 11, 2024 12:17:11
Go to top of page