anorthite

It is usually defined as having "%An" (anorthite) between 50 and 70.

It is monoclinic with a body centered lattice similar to those of anorthite.

Though lawsonite and anorthite have similar compositions, their structures are quite different.

Raw anorthite is also good for making fiberglass and other glass and ceramic products.

As such it represents a plagioclase with less than 10% anorthite content.

The following table shows their compositions in terms of constituent anorthite and albite percentages.

The crystals are a solid solution of 97% anorthite and 3% albite.

It has some resemblance to anorthite, and it has four distinct polymorphs.

Anorthite is a rare compositional variety of plagioclase.

The plagioclase series follows (with percent anorthite in parentheses):

There are several named plagioclase feldspars that fall between albite and anorthite in the series.

The feldspar is a basic variety of plagioclase (anorthite or bytownite).

In minerals, as a feldspar, it can be found as anorthite, an end-member of the plagioclase series.

Bone china consists of two crystalline phases, anorthite (CaO.

The basic soda-lime feldspars (labradorite to anorthite) are those that undergo this type of alteration.

On the moon, the lunar highland material anorthite is similar to the earth mineral bauxite, which is an aluminium ore.

Anorthite is the calcium endmember of plagioclase feldspar.

A substantial amount of crystalline silicates such as olivine, anorthite and diopside were found, materials only formed at high temperature.

The formula of pure anorthite is CaAlSiO.

Here they are generally associated with gabbro and anorthite cumulate layers and are typically high up in the intrusion.

Their commonest minerals are olivine, anorthite, hornblende, augite, biotite and leucite.

They are mostly made up of Ca-poor pyroxene, pigeonite, and Ca-rich plagioclase (anorthite).

The plagioclase is extremely calcic by terrestrial standards, with molar anorthite contents of 94-96% (An94-96).

Replenishment of the magma can see this trend reversed, so that more anorthite is precipitated atop cumulate layers of albite.

Anorthite is a comparatively rare mineral but occurs in the basic plutonic rocks of some orogenic calc-alkaline suites.