Abstract
Kojonenite, Pd7-xSnTe2 (where 0.3 ≤ x ≤ 0.8), is a new mineral (IMA 2013-132) discovered in specimens from the Stillwater Layered Igneous Intrusion, Stillwater Valley, Montana, U.S.A. (45°23′11′′N and 109°53′03′′W). Synthetic kojonenite is tetragonal, space group I4/mmm, with a = 4.001(1) Å and c = 20.929(3) Å giving V = 335.0(1) Å3 with Z = 2. Strongest lines in the synthetic powder pattern [PDF 01-073-5652] are (d in Å, I, hkl) 10.465, 29, 002; 2.496, 52, 114; 2.1986, 100, 116; 2.0930, 18, 00 10; 2.0025, 48, 200. Identity between natural and synthetic kojonenite is illustrated by an electron backscattered diffraction (EBSD) study.
Reflectance data for natural kojonenite for the four COM wavelengths are [λ (nm), Ro, Re′] 470, 55.0, 52.7; 546, 58.5, 56.5; 589, 61.0, 58.3; 650, 63.9, 60.1 and the mineral is uniaxial negative.
Electron microprobe analysis of natural kojonenite yields a simplified formula of Pd6SnTe2 that extends the range reported for the synthetic of Pd7-xSnTe2 (where 0.3 ≤ x ≤ 0.8).
© 2015 by Walter de Gruyter Berlin/Boston
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Artikel in diesem Heft
- Anhydrite: An important sulfur binder limiting the climatic impact of subaerial volcanic eruptions
- Tweed, twins, and holes
- The chemical behavior of fluids released during deep subduction based on fluid inclusions
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