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Перевод: feldspar

[существительное]
полевой шпат

Тезаурус:

1. Typical minerals Feldspar Quartz Mica Amphibole
2. When a thin section of a basalt is examined under a microscope, it can be seen to be made up of a closely-felted mass of interlocking needle-like crystals of feldspar, a millimetre or so long, with a scattering of more colourful tiny crystals of olivine and pyroxene and some black opaque specks of iron oxides.
3. Other very distinctive thin sections were found for vessels with a distinctive rilled decoration which contain the minerals feldspar, mica and quartz: these are fragments of a granite.
4. The quartzo-feldspathic gneiss contains quartz, feldspar and hornblende as the principal minerals, variable though small amounts of biotite, and with iron ores and apatite as the common accessory minerals present.
5. While quartz gives grey and white interference colours, the bright colours of Plate 6.1b are produced by an amphibole mineral (pale colour to yellow to red) and the black and white stripey pattern by the feldspar mineral plagioclase.
6. Basic rocks form the other end of the spectrum, they contain much less silicon dioxide, there is no free quartz (all the silica is present as silicates), but there is a lot of feldspar, and a great deal of pyroxene, olivine and oxide minerals.
7. The amphibolite bands and lenses are more or less biminerallic, with hornblende by far the most abundant mineral, often occupying more than 75 per cent of the rock, and with feldspar as the other mineral present.
8. Typical minerals Feldspar Amphibole Pyroxene Mica
9. Abrasive cleaners : At their simplest these are the scouring powders formulated from little more than sand or feldspar, the aggregate and a small amount of chlorine release agent.
10. Typical minerals Feldspar Pyroxene Olivine Oxides
11. This wing, colour of feldspar
12. Finally, a temperature is reached when a third mineral, feldspar, joins in.
13. Silica or sand is used in scouring powders and feldspar and calcite or chalk are used in cream cleaners