Anorthite
Definition
A mineral belonging to the silicate class, representing the pure calcium endmember of the plagioclase feldspar isomorphic series (calcium aluminum silicate). It crystallizes in the triclinic system, features a white, grayish, or reddish color, and is a common structural constituent in basic and ultrabasic igneous rocks (such as gabbros and basalts), as well as in some metamorphic rocks or meteoritic materials.
Bilingual Equivalents
- Anorthite
- Calcium plagioclase
Grammatical & Source Details
| Inflection Type | Regular masculine noun with standard singular and plural morphological inflections. |
| Formation | Neoclassical borrowing derived from the Greek privative prefix 'an-' + 'orthos' (straight), referring to the oblique cleavage angles. |
| Spelling / Pronunciation | [a.nor.ˈtit] |
| Source | Dana's Textbook of Mineralogy and Petrology |
Contextual Usage Examples
RO: Geologul a analizat secțiunea subțire la microscopul polarizat și a identificat cristale mari de anortit.
EN: The geologist analyzed the thin section under the polarizing microscope and identified large crystals of anorthite.
RO: Anortitul pur este destul de rar pe Pământ, dar este extrem de abundent în rocile colectate de pe suprafața Lunii.
EN: Pure anorthite is quite rare on Earth, but it is extremely abundant in rocks collected from the surface of the Moon.
RO: Compoziția chimică a acestui plagioclaz indică un conținut de peste nouăzeci la sută anortit structural.
EN: The chemical composition of this plagioclase indicates a content of over ninety percent structural anorthite.
Idioms & Phrases
Serie oligoclaz-anortit / Oligoclase-anorthite series
RO: Soluție solidă continuă de feldspați plagioclazy, variind structural de la compuși sodici la compuși calcici.
EN: A continuous solid solution of plagioclase feldspars, structurally varying from sodium to calcium endmembers.
Cristal de anortit / Anorthite crystal
RO: Formațiune minerală triclinică stabilă la temperaturi înalte, specifică lavelor bazaltice răcite lent.
EN: A triclinic mineral formation stable at high temperatures, typical of slowly cooled basaltic lavas.
Anortit magmatic / Magmatic anorthite
RO: Mineral primar cristalizat direct din topiturile silicatice din adâncul scoarței terestre.
EN: A primary mineral crystallized directly from silicate melts deep within the earth's crust.
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