Muscovite Thin Section

Muscovite in thin section thin section gigapans.

Muscovite thin section. It is an essential rock forming mineral present in igneous metamorphic and sedimentary rocks. Like other micas it with no trouble cleaves into skinny transparent sheets. Home rocks and minerals muscovite thin section reference url share.

Another view of pe 19 showing textures at extinction. Alex strekeisen i vetrini della mia fantasia. Although commonly light yellow green in thin section it may be colorless.

Click to see a rollover image that shows the twinning as the thin section is rotated and gives a better view of the birds eye extinction. Muscovite k 2 al 4 si 6 al 2 o 20 oh f 4 the name muscovite comes from muscovy glass a name given to the mineral in elizabethan england due to its use in medieval russia as a cheaper alternative to glass in windows. Muscovite plane polars muscovite crossed polars fine grained muscovite with chlorite green plane polars fine grained muscovite with chlorite crossed polars muscovite with biotite and garnet in maidens gneiss plane polars muscovite with biotite and garnet in maidens gneiss crossed polars.

Muscovite is the most common mineral of the mica own family. Muscovite thin section view description. Biotite k mg fe 2 3 alsi 3 o 10 oh f 2 biotite is a common phyllosilicate mineral within the mica group.

Its interference colors commonly seem anomalously bright compared to pyroxenes possibly a result of the high dispersion of the 2v. Muscovite has a mohs hardness of 2 2 25 parallel to the face 4 perpendicular to the and a specific gravity of 2 76 3. Muscovite sheets have a pearly to vitreous luster on their floor.

Muscovite thin section photomicrographs are taken in plane polarized light and cross polarized light and can easily be recognized under the microscope. To link to this object paste this link in email im or document to embed this object paste this html in website. Biotite is a solid solution between the end members phlogopite kmg 3 alsi 3 o 10 oh 2 and annite kfe 3 alsi 3 o 10 oh 2 although pure annite does not occur in nature in addition small amounts of na rb cs and ba may substitute for k and like in other minerals f can.