Lisiguangite, CuPtBiS3, is a new mineral species discovered in a PEG-bearing, Co-Cu sulfide vein in garnet pyroxenite of the Yanshan Mountains, Chengde Prefecture, Hebei Province, China. It is associated with chalcopy...Lisiguangite, CuPtBiS3, is a new mineral species discovered in a PEG-bearing, Co-Cu sulfide vein in garnet pyroxenite of the Yanshan Mountains, Chengde Prefecture, Hebei Province, China. It is associated with chalcopyrite and bornite, galena, minor pyrite, carrolite, molybdenite and the platinum-group minerals daomanite （CuPtAsS2）, Co-bearing malanite （Cu（Pt, Co）2S4） sperrylite, moncheite, cooperite and malyshevite （CuPdBiS3）, rare damiaoite （Pt2In3） and yixunite （Pt3In）. Lisiguangite occurs as idiomorphic crystals, tabular or lamellae （010） and elongated [100] or as aggregates, up to 2 mm long and 0.5 mm wide. The mineral is opaque, has lead-gray color, black streak and metallic luster. The mineral is non-fluorescent. The observed morphology displays the following forms： pinacoids {100}, {010}, {001}, and prism [110}. No twining is observed. The a：b：c ratio, calculated from unit-cell parameters, is 0.6010：1：0.3836. Cleavage： {010} perfect, {001} distinct, {100} may be visible. H Mohs： 2 1/2; VHN25=46.7-49.8 （mean 48.3） kg/mm^2. Tenacity： brittle. Lisiguangite is bright white with a yellowish tint. In reflected light it shows neither internal reflections nor bireflectance or pleochroism. It has weak to moderate anisotropy （blue-greenish to brownish） and parallel-axial extinction. The reflectance values in air （and in oil） for R3, R4 and （^imR3, ^imR4）, at the standard Commission on Ore Mineralogy wavelengths are： 37.5, 35.7 （23.4, 22.3） at 470nm; 38.6, 36.5 （23.6, 22.6） at 546nm; 39.4, 37.5 （23.6, 22.7） at 589 nm and 40.3, 38.2 （23.7, 22.9） at 650 nm. The average of eight electron-microprobe analyses： Cu 12.98, Pt 30.04, Pd 2.69, Bi 37.65 and S 17.55, totaling 100.91%, corresponding to Cu1.10（Pt0.83, Pd0.14）∑0.97Bi0.97S2.96 based on six atoms apfu. The ideal formula is CuPtBiS3. The mineral is orthorhombic. Space group： P212121, a=7.7152（15）A, b=12.838（3）A, c=4.9248（10）A, V=487.80（17）A^3, Z=4. The six strongest lines in the X-ray powder-diffraction pattern [d in A（l） （h k l） are 6.40（30）（020）, 3.24（80）（031）, 3.03（100）（201）, 2.27（40）（051）, 2.14（50）（250）, 1.865（60）（232）.展开更多
The crystal structure of lisiguangite, CuPtBiS3, from Yanshan mountains, Chengde Prefecture, Hebei Province, China has been determined by single crystal X-ray diffraction. It belongs to orthorhombic space group P21212...The crystal structure of lisiguangite, CuPtBiS3, from Yanshan mountains, Chengde Prefecture, Hebei Province, China has been determined by single crystal X-ray diffraction. It belongs to orthorhombic space group P212121 with a = 7.7372（15）A, b = 12.844（3） A, c -- 4.9062（10） A, V = 487.57（17） A^3, Z = 4. The final full-matric least-square refinement on F2 converged with R1 = 0.0495 and wR2 = 0.0992 for 704 observed reflections [I≥2σ（I）]. Lisiguangite is the isomorph of known CuNiSbS3 and CuNiBiS3. Pt^2＋ and Bi^3＋ have the distorted octahedral coordination enviroments composed of two metal and four S and Cu^＋2 has a distorted tetrahedrai coordination environment with four S atoms. Each S atom is surrounded by four metals to give a tetrahedral environment. The crystal structure is a complex 3 dimensional network.展开更多
文摘Lisiguangite, CuPtBiS3, is a new mineral species discovered in a PEG-bearing, Co-Cu sulfide vein in garnet pyroxenite of the Yanshan Mountains, Chengde Prefecture, Hebei Province, China. It is associated with chalcopyrite and bornite, galena, minor pyrite, carrolite, molybdenite and the platinum-group minerals daomanite （CuPtAsS2）, Co-bearing malanite （Cu（Pt, Co）2S4） sperrylite, moncheite, cooperite and malyshevite （CuPdBiS3）, rare damiaoite （Pt2In3） and yixunite （Pt3In）. Lisiguangite occurs as idiomorphic crystals, tabular or lamellae （010） and elongated [100] or as aggregates, up to 2 mm long and 0.5 mm wide. The mineral is opaque, has lead-gray color, black streak and metallic luster. The mineral is non-fluorescent. The observed morphology displays the following forms： pinacoids {100}, {010}, {001}, and prism [110}. No twining is observed. The a：b：c ratio, calculated from unit-cell parameters, is 0.6010：1：0.3836. Cleavage： {010} perfect, {001} distinct, {100} may be visible. H Mohs： 2 1/2; VHN25=46.7-49.8 （mean 48.3） kg/mm^2. Tenacity： brittle. Lisiguangite is bright white with a yellowish tint. In reflected light it shows neither internal reflections nor bireflectance or pleochroism. It has weak to moderate anisotropy （blue-greenish to brownish） and parallel-axial extinction. The reflectance values in air （and in oil） for R3, R4 and （^imR3, ^imR4）, at the standard Commission on Ore Mineralogy wavelengths are： 37.5, 35.7 （23.4, 22.3） at 470nm; 38.6, 36.5 （23.6, 22.6） at 546nm; 39.4, 37.5 （23.6, 22.7） at 589 nm and 40.3, 38.2 （23.7, 22.9） at 650 nm. The average of eight electron-microprobe analyses： Cu 12.98, Pt 30.04, Pd 2.69, Bi 37.65 and S 17.55, totaling 100.91%, corresponding to Cu1.10（Pt0.83, Pd0.14）∑0.97Bi0.97S2.96 based on six atoms apfu. The ideal formula is CuPtBiS3. The mineral is orthorhombic. Space group： P212121, a=7.7152（15）A, b=12.838（3）A, c=4.9248（10）A, V=487.80（17）A^3, Z=4. The six strongest lines in the X-ray powder-diffraction pattern [d in A（l） （h k l） are 6.40（30）（020）, 3.24（80）（031）, 3.03（100）（201）, 2.27（40）（051）, 2.14（50）（250）, 1.865（60）（232）.
文摘The crystal structure of lisiguangite, CuPtBiS3, from Yanshan mountains, Chengde Prefecture, Hebei Province, China has been determined by single crystal X-ray diffraction. It belongs to orthorhombic space group P212121 with a = 7.7372（15）A, b = 12.844（3） A, c -- 4.9062（10） A, V = 487.57（17） A^3, Z = 4. The final full-matric least-square refinement on F2 converged with R1 = 0.0495 and wR2 = 0.0992 for 704 observed reflections [I≥2σ（I）]. Lisiguangite is the isomorph of known CuNiSbS3 and CuNiBiS3. Pt^2＋ and Bi^3＋ have the distorted octahedral coordination enviroments composed of two metal and four S and Cu^＋2 has a distorted tetrahedrai coordination environment with four S atoms. Each S atom is surrounded by four metals to give a tetrahedral environment. The crystal structure is a complex 3 dimensional network.
