noun ダウンロード 🔗共有 正長石、カリウムアルミニウム珪酸塩 Potassium aluminum silicate, KAlSi3O8, a common feldspar of igneous, plutonic, and metamorphic rocks. Orthoclase is the main feldspar of pegmatite occurrences, where it is most commonly flesh-colored. Orthoclase is used in the ceramic and glass industries and as a decorative gravel. Examples : "The countertop in our kitchen is made from granite, which contains grains of quartz, mica, and flesh-colored orthoclase. " 私たちのキッチンのカウンターは、石英、雲母、そして肉色の正長石の粒を含む花崗岩でできています。 geology mineral material substance chemistry AIとチャット語彙ゲーム読解練習