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dc.contributor.authorAndersen, Olaf
dc.coverage.spatial17124 Kragerø
dc.coverage.spatial13113 Hidra
dc.coverage.spatial16122 Tvedestrand
dc.coverage.spatial15123 Evje
dc.coverage.spatialEVJE OG HORNNES
dc.coverage.spatialRISØR
dc.coverage.spatialKRAGERØ
dc.date.accessioned2020-08-26T12:35:59Z
dc.date.available2020-08-26T12:35:59Z
dc.date.issued1926
dc.identifier.urihttps://hdl.handle.net/11250/2674508
dc.description.abstractThe present publication is a description, in non-technical language, of the properties, geological mode of occurrences, exploitation, and uses of feldspar with special reference to the Norwegian feldspar industry. Systematic descriptions of commercial deposits are reserved for a future publication to be issued as no. 128b of the present series. Chapter 1 contains a general description of the mineralogical, chemical, and physical properties of the various species of the feldspar group. - Table I gives the theoretical chemical composition of mixture of potash feldspar and soda feldspar for intervals of 10 pct. by weight. - Table 2 gives the corresponding figures for mixtures of soda feldspar and lime feldspar. - Table 3 contains a few examples of chemical analyses of feldspar from Norwegian occurrences. The analyses, of which No.s 1-5 are new, represent selected, \"pure\" feldspar. No.s 1, 2 and 3 are commercial \"potash feldspars\" from granite pegmatites, No. 4 a soda-potash feldspar from syenite pegmatite, and No. 5 a soda feldspar of commercial quality from a pyroxene bearing granite pegmatite. No.s 6 and 7 are old analyses respectively of oligoclase from granite pegmatite and labradorite from anorthosite. - Table 4 contains multiplication factors for the recalculation of feldspar analyses.
dc.language.isonor
dc.relation.ispartofseriesNGU (128A)
dc.rightsNavngivelse 4.0 Internasjonal
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no
dc.subjectMINERAL
dc.subjectKJEMISK ANALYSE
dc.subjectMIKROSKOPERING
dc.subjectKRYSTALLOGRAFI
dc.subjectMINERALOGI
dc.subjectFELTSPAT
dc.titleFeltspat I. Feltspatmineralenes egenskaper, forekomst og praktiske utnyttelse med særlig henblikk på den norske feltspatindustri.
dc.typeJournal article
dc.description.localcode35321
dc.source.pagenumber1-142


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    Artikler fra seriene NGU, NGU Bulletin og NGU Skrifter

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Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal