pyroxenes in English

noun
1
any of a large class of rock-forming silicate minerals, generally containing calcium, magnesium, and iron and typically occurring as prismatic crystals.
Extreme cases are found in mineral groups such as apatite, amphibole, pyroxene , feldspar, and tourmaline.

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Below are sample sentences containing the word "pyroxenes" from the English Dictionary. We can refer to these sentence patterns for sentences in case of finding sample sentences with the word "pyroxenes", or refer to the context using the word "pyroxenes" in the English Dictionary.

1. Amphiboles weather pretty easily (although not as rapidly as pyroxenes)

2. The Amphiboles differ chemically from the pyroxenes in two major respects

3. The Amphiboles and pyroxenes closely resemble one another and are distinguished by cleavage

4. Now, we will explore double-chained inosilicates in this presentation on Amphiboles along with learning about the differences between Amphiboles and pyroxenes

5. Analysis showed that the meteorite contained, apart from iron-nickel alloy, a small quantity of silicates (pyroxenes) not occurring on Earth.

6. Forsterite-rich olivine is the most abundant mineral in the mantle above a depth of about 400 km (250 mi); pyroxenes are also important minerals in this upper part of the mantle.

7. The chief differences between Amphiboles and pyroxenes are that (i) they contain essential hydroxyl (OH) or halogene (F, Cl) and (ii) the basic structure is a double chain of

8. The Amphiboles have prismatic cleavage with an angle of 56° and 124°, which distinguishes it from the pyroxenes, which have an angle of 87° and 93° (almost perpendicular).

9. They have highly variable proportions of pyroxenes, gar¬ net, spinel and olivine and range from garnet-poor and spinel-rich Ariegite (+ olivine) to garnet-rich Ariegite with only accessory spinel

10. Pyroxenes were named this way because of their presence in volcanic lavas, where they are sometimes seen as crystals embedded in volcanic glass; it was assumed they were impurities in the glass, hence the name "fire strangers".

11. Two samples contain pyrope-rich gamets but coexisting pyroxenes are extremely magnesian and temperatures of equilibration of both primary omphacite-pyrope and secondary omphacite-almandine/pyrope-chlorite are only slightly higher (500–650° at 10 kbar) than those for almandine jadeite eclogites and estimates overlap with those of some examples of the latter type.

12. Further problems related to adjectival modifiers may particularly concern petrologists: (a) many modifiers remain formally undefined, so that there is no way of consistently distinguishing, say, ‘subcalcic augite’ from ‘augite’; (b) other modifiers are applied inconsistently in the report; (c) there is imbalance among modifiers: for example, aluminian applies to many more pyroxenes than titanian, even though the defined limits (>0,1 PFU) are the same.