チタン鉄鉱 化学特性,用途語,生産方法
解説
チタン鉄鉱，りょう面体晶系，空間群 R3，格子定数 a0 ＝ 0.5083，c0 ＝ 1.404 nm．密度4.79 g cm－3．硬度5～6．六角板状．へき開なし．金属光沢，黒色，二軸性負，複屈折大．Mg，Mnの割合が多くなればそれぞれゲイキ石，パイロファン石となる．また，常温では，6％ 以下の赤鉄鉱Fe2O3を固溶している．固溶体分離現象のため，赤鉄鉱または磁鉄鉱とのintergrowthがしばしば観察される．
産出する
チタン鉄鉱，FeのかわりにMg，Mnが入り，それぞれ固溶体をなす．はんれい岩，せん緑岩，斜長岩に伴って産出する．一般の岩石にも副成分鉱物として広く分布する．
物理的性質
Habit: tabullar, lamellar, massive.
Color: iron black.
Diaphaneity: opaque.
Luster: submetallic.
Streak: brownish black.
Fracture: subconchoidal.
Cleavage: none.
Chemical: insol. in HCl, or HNO3 but attacked by boiling H2SO4. Slightly antiferromagnetic
with a specific magnetic susceptibility of +10
–6 m
3.kg
–1. Nonfusible with a melting point of
1365–1470°C. Semiconductive with an electrical resistivity ranging from 0.001 to 4 Ω.m.
Deposits: massive hard rock hemo-ilmenite deposits in ultramafic igneous rocks (e.g.,
anorthosites, peridotites, gabbros, diorites, syenites) such as the large deposits of Allard
lake (Québec, Canada) or Tellnes (Norway). Sedimentary deposits as heavy mineral sands
in South Africa (Richards Bay), Australia, India and Brazil.
使用
Titanium paints and enamel, source of titanium metal, welding rods, titanium alloys, ceramics.
定義
Iron-black mineral, black to brownish-red streak, submetallic luster, resembles magnetite in appearance but is readily distinguished by feeble magnetic character, d 4.5–5, Mohs hardness 5–6.
チタン鉄鉱 上流と下流の製品情報
原材料
準備製品