Murashkoite, FeP, a new terrestrial phosphide from pyrometamorphic rocks of the Hatrurim Formation, South Levant

摘要: Murashkoite, FeP, is a new mineral found in pyrometamorphic rocks of the Hatrurim Formation, South Levant. It typical accessory phase marbles and paralavas southern Negev Desert, Israel on Transjordan Plateau, Jordan. Murashkoite occurs as grains aggregates up to 2 mm closely associated with barringerite, (Fe,Ni)2P, zuktamrurite, FeP2. The rock-forming minerals include pyroxenes diopside-hedenbergite series, anorthite subordinate gehlenite, tridymite, cristobalite, pyrrhotite, fluorapatite, chromite, magnetite, hematite, merrillite late hydrothermal carbonates, silicates sulfates. Macroscopically, murashkoite yellowish-grey colour has metallic lustre. In reflected light, white beige tint it non-pleochroic. anisotropy distinct, from yellow-grey greyish-blue. Selected reflectance values [Rmax–Rmin, % (λ, nm)] are: 42.7–40.8 (400), 42.0–40.6 (500), 44.5–43.4 (600), 48.0–47.7 (700). brittle. VHN20 = 468 kg mm−2. holotype material chemical composition (electron microprobe): Fe 63.82; Ni 0.88; P 35.56; total 100.26 wt.%. empirical formula calculated basis 2 apfu (Fe0.99Ni0.01)1.00P1.00 corresponding FeP. orthorhombic, space group Pnma, unit cell parameters refined single-crystal data 5.099(2), b 3.251(2), c 5.695(2) A, V 94.41(8) A3, Z = 4, Dx = 6.108(5) g cm−3. crystal structure was solved R1 = 0.0305 131 unique reflections I > 2σ(I). strongest lines powder X-ray diffraction pattern [(d, A) (I, %) (hkl)]: 2.831(75)(002,011); 2.548(22)(200); 2.477(46)(102,111); 1.975(47)(112); 1.895(100)(202,211); 1.779(19)(103); 1.632(45)(013,301,020). named honour Dr. Mikhail Nikolaevich Murashko (born 1952), for his contributions mineralogy Formation. natural counterpart synthetic compound widely used heterogeneous catalysis electrocatalysis.