Plagioclase

In volcanic rocks, fine-grained plagioclase can display a 'microlitic' texture of many small crystals.

Plagioclase is a series of tectosilicate (framework silicate) minerals within the feldspar group. Rather than referring to a particular mineral with a specific chemical composition, plagioclase is a continuous solid solution series, more properly known as the plagioclase feldspar series (from the Greek "oblique fracture", in reference to its two cleavage angles). This was first shown by the German mineralogist Johann Friedrich Christian Hessel (1796–1872) in 1826. The series ranges from albite to anorthite endmembers (with respective compositions NaAlSi₃O₈ to CaAl₂Si₂O₈), where sodium and calcium atoms can substitute for each other in the mineral's crystal lattice structure. Plagioclase in hand samples is often identified by its polysynthetic crystal twinning or 'record-groove' effect.

单词	Plagioclase Feldspar
释义	Plagioclase Feldspar 英语例句库 Latites contain plagioclase feldspar (andesine or oligoclase) as large, single crystals (phenocrysts) in a fine-grained matrix of orthoclase feldspar and augite. 安粗岩中包含斜长石（中长石或奥长石），是在正长石和普通辉石组成的细粒基质中的大单晶体（斑晶）。原声例句老托福听力93篇集锦 These final samples are all plagioclase feldspars. 这些最终样品都是斜长石。英语百科 Plagioclase Plagioclase is a series of tectosilicate (framework silicate) minerals within the feldspar group. Rather than referring to a particular mineral with a specific chemical composition, plagioclase is a continuous solid solution series, more properly known as the plagioclase feldspar series (from the Greek "oblique fracture", in reference to its two cleavage angles). This was first shown by the German mineralogist Johann Friedrich Christian Hessel (1796–1872) in 1826. The series ranges from albite to anorthite endmembers (with respective compositions NaAlSi₃O₈ to CaAl₂Si₂O₈), where sodium and calcium atoms can substitute for each other in the mineral's crystal lattice structure. Plagioclase in hand samples is often identified by its polysynthetic crystal twinning or 'record-groove' effect.
随便看	schulzite的意思 Schulz iteration的意思 Schulz Neumann nasal tube for small animals的意思 Schulzospora的意思 schulzs的意思 Schulz,Theodore William的意思 schum的意思 Schumacher的意思 Schumacherian的意思 schumacherite的意思 Schumacher, Michael的意思 schumachers的意思 Schumacher sternum shears的意思 Schumacher umbilical scissors的意思 Schumacher uterine biopsy forceps的意思 schumacker的意思 schumake的意思 Schumaker的意思 Schuman的意思 Schuman method的意思 schumann的意思 Schumann, Clara的意思 Schumann,Clara Josephine的意思 Schumann,Elisabeth的意思 Schumannesque的意思

Plagioclase Feldspar

Plagioclase