feldspar

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feldspar

[feld′spär]
Etymology: Ger, feld, field, spath, spar
a crystalline mineral of aluminum silicate with potassium, sodium, barium, and calcium. It melts over a range of 593.5° C to 1093° C (1100° F to 2000° F) and is an important component of dental porcelain.

feldspar (feld´spär),

n a crystalline mineral of aluminum silicate with po-tassium, sodium, barium, or calcium– NaAlSi3O8 or KAlSi3O8. Feldspar melts over a range of 1,100°F to 2,000°F (593.5°C to 1093.5°C). An important constituent of dental porcelain.
feldspar, orthoclase ceramic,
n a clay found in large quantity in the solid crust of the earth. It acts as a filler and imparts body to the fused dental porcelain.
References in periodicals archive ?
A key objective of the 2014 exploration program has been met, as the program was focused on better defining the path of the coarse grained feldspathic peridotite (CGO) intrusion as it moves towards the east, away from the currently outlined SMSU.
The metasandstone is dominantly feldspathic wacke but is more quartz-rich than the metasandstone beds in the High Head member and Bloomfield formation (White 2010).
i) Red feldspathic silty sand (ORMR) on path north-west of a prominent meander in Ormiston Creek (23[degrees]45'S, 132[degrees] 59'E) and gravels in the meander bed (ORMG), both overlying the granitic bedrock of Ormiston Pound, 100km west of Alice Springs (Northern Territory).
Light-coloured sandstones of this member, formed during the initial phase of the Lontova transgression, are inequigranular, texturally mature, quartzose, seldom feldspathic quartzose.
The reddish podzolics of central and northern Okinawa are derived from metamorphosed sediments of Palaeozoic Age, principally phyllites and feldspathic sandstone.
As previously reported by Talon, the 2014 exploration program has been focused on better defining the path of the coarse grained feldspathic peridotite (CGO) intrusion, which hosts the SMSU, as it moves towards the east.
Project Mineral Specific Mineralization Project Area Zone Host Lithology Lithology Type Tamarack Net Textured North Tamarack and Disseminated Project Zone SMSU Feldspathic Peridotite CGO Sulphides Massive MSU Meta-Sediments Sediments Sulphides Disseminated and Net Peridotite and Feldspathic Textured 138 Peridotite Mixed Zone Sulphides Disseminated Other 480 Peridotite FGO Sulphides Massive Laucamp Peridotite FGO Sulphide Veins
The felsic igneous rocks, as well as the interbedded lithic sandstone, conglomerate, and feldspathic sandstone of the Cumberland Hill Formation, the topic of this paper, were considered part of the Late Wesphalian Pictou Group, and consequently associated with the latter episode of magmatism based on stratigraphic relationships (Fyffe and Barr 1986).
Table 4: Feldspathic Contents in Key End Use Products II-17
The SDWZS intrusion is comprised of three lithologies: 1) gabbroic rocks, 2) ultramafic rocks that include hornblendite and feldspathic hornblendite and 3) gossan which include sulphide-bearing hornblendite, less commonly gabbro and tectonized equivalents.