Definition of orthoclase in English:

orthoclase

noun ˈɔːθəkleɪz

mass noun

A common rock-forming mineral occurring typically as white or pink crystals. It is a potassium-rich alkali feldspar and is used in ceramics and glass-making.
Example sentencesExamples
- Associated minerals are white orthoclase, milky quartz, and muscovite.
- Some larger grains also occur, and most grains are slightly perthitic showing variable degrees of transformation from orthoclase to microcline.
- He mentions that the amazonite occurred in association with orthoclase (almost certainly microcline), smoky quartz, specular hematite, and rare anhydrite.
- Another example is Moonstone - a variety of orthoclase mineral that, when polished, has chatoyant optical property that allows light to show as a crescent in the stone.
- Of these, alkali feldspar, particularly orthoclase, is the most common.
- Quartz, microcline or orthoclase and plagioclase are ubiquitous in the Everest granites, which also contain varying amounts of tourmaline, muscovite, biotite and garnet.
- Feldspars are added as orthoclase in order to reduce the devitrification of the glass.
- In the vein's central vug, ferroaxinite overlies a selvage (fault gouge) of quartz, orthoclase, and microcline feldspar and is followed by fine-grained calcite.
- The mineral occurs with smoky quartz, aegirine, and orthoclase.
- Two-feldspar thermometry fails to retrieve peak temperatures from these rocks owing to late stage unmixing reducing the albite content of orthoclase.
- Most of the intrusion comprises a coarse-grained, pink gneissic granite containing numerous augen of recrystallized perthitic orthoclase up to 1.25 cm across.
- Orthoclase is a polymorph of other minerals that share the same chemistry, but have different crystal structures.
- Leucosomes generally plot on the high orthoclase side of the leucogranites and Grampian Granites plot on the low side.
- He further stated that the lithophysae are lined with orthoclase and quartz, and the cavities are partially filled with calcite, quartz, and chlorite.
- The central potassic zone is characterized by the presence of potassium-bearing minerals such as orthoclase (a potassium feldspar) and biotite.
- Amazonite crystals sometimes have white to buff-colored overgrowths of intermediate microcline, sanidine, and/or orthoclase preferentially coating the basal pinacoid and/or various prism faces.
- Examples of silicates include quartz, orthoclase, and olivine.
- The microgranite has a felsitic groundmass containing microphenocrysts of albite and orthoclase along with phenocrysts of corroded quartz and sporadic dihedral garnet.
- A slightly bluish-gray feldspar, probably either microcline or orthoclase, without polysynthetic twinning lines occurs as crystals to 2 cm across.
- Calcic amphiboles, including hornblende and actinolite are abundant, and probably are alteration products, which also include albite, orthoclase and rare pyrite.

Origin

Mid 19th century: from ortho- 'straight' + Greek klasis 'breaking' (because of the characteristic two cleavages at right angles).

Definition of orthoclase in US English:

orthoclase

noun

A common rock-forming mineral occurring typically as white or pink crystals. It is a potassium-rich alkali feldspar and is used in ceramics and glassmaking.
Example sentencesExamples
- He further stated that the lithophysae are lined with orthoclase and quartz, and the cavities are partially filled with calcite, quartz, and chlorite.
- Calcic amphiboles, including hornblende and actinolite are abundant, and probably are alteration products, which also include albite, orthoclase and rare pyrite.
- Two-feldspar thermometry fails to retrieve peak temperatures from these rocks owing to late stage unmixing reducing the albite content of orthoclase.
- He mentions that the amazonite occurred in association with orthoclase (almost certainly microcline), smoky quartz, specular hematite, and rare anhydrite.
- The microgranite has a felsitic groundmass containing microphenocrysts of albite and orthoclase along with phenocrysts of corroded quartz and sporadic dihedral garnet.
- Orthoclase is a polymorph of other minerals that share the same chemistry, but have different crystal structures.
- In the vein's central vug, ferroaxinite overlies a selvage (fault gouge) of quartz, orthoclase, and microcline feldspar and is followed by fine-grained calcite.
- Some larger grains also occur, and most grains are slightly perthitic showing variable degrees of transformation from orthoclase to microcline.
- Feldspars are added as orthoclase in order to reduce the devitrification of the glass.
- A slightly bluish-gray feldspar, probably either microcline or orthoclase, without polysynthetic twinning lines occurs as crystals to 2 cm across.
- Quartz, microcline or orthoclase and plagioclase are ubiquitous in the Everest granites, which also contain varying amounts of tourmaline, muscovite, biotite and garnet.
- The mineral occurs with smoky quartz, aegirine, and orthoclase.
- Examples of silicates include quartz, orthoclase, and olivine.
- Another example is Moonstone - a variety of orthoclase mineral that, when polished, has chatoyant optical property that allows light to show as a crescent in the stone.
- Associated minerals are white orthoclase, milky quartz, and muscovite.
- Most of the intrusion comprises a coarse-grained, pink gneissic granite containing numerous augen of recrystallized perthitic orthoclase up to 1.25 cm across.
- The central potassic zone is characterized by the presence of potassium-bearing minerals such as orthoclase (a potassium feldspar) and biotite.
- Leucosomes generally plot on the high orthoclase side of the leucogranites and Grampian Granites plot on the low side.
- Of these, alkali feldspar, particularly orthoclase, is the most common.
- Amazonite crystals sometimes have white to buff-colored overgrowths of intermediate microcline, sanidine, and/or orthoclase preferentially coating the basal pinacoid and/or various prism faces.

Origin

Mid 19th century: from ortho- ‘straight’ + Greek klasis ‘breaking’ (because of the characteristic two cleavages at right angles).

单词	orthoclase
释义	Definition of orthoclase in English: orthoclase noun ˈɔːθəkleɪz mass noun A common rock-forming mineral occurring typically as white or pink crystals. It is a potassium-rich alkali feldspar and is used in ceramics and glass-making. Example sentencesExamples Associated minerals are white orthoclase, milky quartz, and muscovite. Some larger grains also occur, and most grains are slightly perthitic showing variable degrees of transformation from orthoclase to microcline. He mentions that the amazonite occurred in association with orthoclase (almost certainly microcline), smoky quartz, specular hematite, and rare anhydrite. Another example is Moonstone - a variety of orthoclase mineral that, when polished, has chatoyant optical property that allows light to show as a crescent in the stone. Of these, alkali feldspar, particularly orthoclase, is the most common. Quartz, microcline or orthoclase and plagioclase are ubiquitous in the Everest granites, which also contain varying amounts of tourmaline, muscovite, biotite and garnet. Feldspars are added as orthoclase in order to reduce the devitrification of the glass. In the vein's central vug, ferroaxinite overlies a selvage (fault gouge) of quartz, orthoclase, and microcline feldspar and is followed by fine-grained calcite. The mineral occurs with smoky quartz, aegirine, and orthoclase. Two-feldspar thermometry fails to retrieve peak temperatures from these rocks owing to late stage unmixing reducing the albite content of orthoclase. Most of the intrusion comprises a coarse-grained, pink gneissic granite containing numerous augen of recrystallized perthitic orthoclase up to 1.25 cm across. Orthoclase is a polymorph of other minerals that share the same chemistry, but have different crystal structures. Leucosomes generally plot on the high orthoclase side of the leucogranites and Grampian Granites plot on the low side. He further stated that the lithophysae are lined with orthoclase and quartz, and the cavities are partially filled with calcite, quartz, and chlorite. The central potassic zone is characterized by the presence of potassium-bearing minerals such as orthoclase (a potassium feldspar) and biotite. Amazonite crystals sometimes have white to buff-colored overgrowths of intermediate microcline, sanidine, and/or orthoclase preferentially coating the basal pinacoid and/or various prism faces. Examples of silicates include quartz, orthoclase, and olivine. The microgranite has a felsitic groundmass containing microphenocrysts of albite and orthoclase along with phenocrysts of corroded quartz and sporadic dihedral garnet. A slightly bluish-gray feldspar, probably either microcline or orthoclase, without polysynthetic twinning lines occurs as crystals to 2 cm across. Calcic amphiboles, including hornblende and actinolite are abundant, and probably are alteration products, which also include albite, orthoclase and rare pyrite. Origin Mid 19th century: from ortho- 'straight' + Greek klasis 'breaking' (because of the characteristic two cleavages at right angles). Definition of orthoclase in US English: orthoclase noun A common rock-forming mineral occurring typically as white or pink crystals. It is a potassium-rich alkali feldspar and is used in ceramics and glassmaking. Example sentencesExamples He further stated that the lithophysae are lined with orthoclase and quartz, and the cavities are partially filled with calcite, quartz, and chlorite. Calcic amphiboles, including hornblende and actinolite are abundant, and probably are alteration products, which also include albite, orthoclase and rare pyrite. Two-feldspar thermometry fails to retrieve peak temperatures from these rocks owing to late stage unmixing reducing the albite content of orthoclase. He mentions that the amazonite occurred in association with orthoclase (almost certainly microcline), smoky quartz, specular hematite, and rare anhydrite. The microgranite has a felsitic groundmass containing microphenocrysts of albite and orthoclase along with phenocrysts of corroded quartz and sporadic dihedral garnet. Orthoclase is a polymorph of other minerals that share the same chemistry, but have different crystal structures. In the vein's central vug, ferroaxinite overlies a selvage (fault gouge) of quartz, orthoclase, and microcline feldspar and is followed by fine-grained calcite. Some larger grains also occur, and most grains are slightly perthitic showing variable degrees of transformation from orthoclase to microcline. Feldspars are added as orthoclase in order to reduce the devitrification of the glass. A slightly bluish-gray feldspar, probably either microcline or orthoclase, without polysynthetic twinning lines occurs as crystals to 2 cm across. Quartz, microcline or orthoclase and plagioclase are ubiquitous in the Everest granites, which also contain varying amounts of tourmaline, muscovite, biotite and garnet. The mineral occurs with smoky quartz, aegirine, and orthoclase. Examples of silicates include quartz, orthoclase, and olivine. Another example is Moonstone - a variety of orthoclase mineral that, when polished, has chatoyant optical property that allows light to show as a crescent in the stone. Associated minerals are white orthoclase, milky quartz, and muscovite. Most of the intrusion comprises a coarse-grained, pink gneissic granite containing numerous augen of recrystallized perthitic orthoclase up to 1.25 cm across. The central potassic zone is characterized by the presence of potassium-bearing minerals such as orthoclase (a potassium feldspar) and biotite. Leucosomes generally plot on the high orthoclase side of the leucogranites and Grampian Granites plot on the low side. Of these, alkali feldspar, particularly orthoclase, is the most common. Amazonite crystals sometimes have white to buff-colored overgrowths of intermediate microcline, sanidine, and/or orthoclase preferentially coating the basal pinacoid and/or various prism faces. Origin Mid 19th century: from ortho- ‘straight’ + Greek klasis ‘breaking’ (because of the characteristic two cleavages at right angles).
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