IMA 2018-141 = andymcdonaldite

database, nuove specie, discrediti,
ridefinizioni, classificazioni, ecc.
Rispondi
Avatar utente
Marco E. Ciriotti
Messaggi: 27097
Iscritto il: ven 25 giu, 2004 11:31
Località: via San Pietro, 55 I-10073 Devesi/Cirié TO - Italy
Contatta:

IMA 2018-141 = andymcdonaldite

Messaggio da Marco E. Ciriotti » mer 06 nov, 2019 12:25

Prossima pubblicazione.

Referenza:
▪ Coolbaugh, M.F., McCormack, J.K., Raudsepp, M., Czech, E., McMillan, R., Kampf, A.R. (2020): Andymcdonaldite, (Fe3+2Te6+O6), a new ferric iron tellurate with inverse trirutile structure from the Detroit District, Juab Country, Utah. Canadian Mineralogist, 58, (in press).

Abstract:
Andymcdonaldite is a new ferric-iron-tellurate mineral that occurs within Au-, Te-, and Bi-rich jasperoid at the Wildcat prospect in the Detroit district, Juab County, Utah. The mineral has a yellow-brown to brownish-black color and occurs as extremely cryptocrystalline (11-25 nm) material in thin films and breccia matrix fillings, and is associated with gold (native), tellurium (native), beyerite, clinobisvanite, and a variety of tellurium oxysalt minerals that include carlfriesite, eckhardite, frankhawthorneite, khinite, mcalpinite, paratellurite, tellurite, tlapallite, and xocolatlite. Its natural occurrence is the first known for a phase with an ordered (tetragonal) inverse trirutile structure (A3+2B6+O6) that otherwise has many synthetic representatives. The B site in andymcdonaldite is occupied by Te and the A site is dominated by Fe with up to approximately 14% substitution by other cations. An empirical formula of (Fe1.74Cu0.12Mn0.06Al0.05Mg0.05)Σ2.02Te1.01O6 was obtained from electron microprobe analyses. Powder x-ray diffraction data, Raman spectra, and unit-cell dimensions for andymcdonaldite strongly resemble those for the synthetic analogue, Fe3+2Te6+O6. The strongest X-ray diffraction lines are [dobsÅ(Iobs)(hkl)]: 4.14(27)(101), 3.28(100)(110), 2.54(71)(103), 1.71(72)(213), and 1.37(39)(303,116). The strongest Raman bands are at 748, 643, and 417 cm-1. The cell dimensions are a = 4.622-4.630 Å, c = 9.077-9.087 Å, and V = 193.94-194.80 Å3 (Z = 2).
Marco E. Ciriotti

«Things are interesting only in so far as they relate themselves to other things»

Avatar utente
Marco E. Ciriotti
Messaggi: 27097
Iscritto il: ven 25 giu, 2004 11:31
Località: via San Pietro, 55 I-10073 Devesi/Cirié TO - Italy
Contatta:

Re: IMA 2018-141 = andymcdonaldite

Messaggio da Marco E. Ciriotti » lun 20 gen, 2020 17:34

Pubblicazione effettuata.

Referenza:
▪ Coolbaugh, M.F., McCormack, J.K., Raudsepp, M., Czech, E., McMillan, R., Kampf, A.R. (2020): Andymcdonaldite, (Fe3+2Te6+O6), a new ferric iron tellurate with inverse trirutile structure from the Detroit District, Juab Country, Utah. Canadian Mineralogist, 8, 85–97.
Marco E. Ciriotti

«Things are interesting only in so far as they relate themselves to other things»

Rispondi

Chi c’è in linea

Visitano il forum: Nessuno e 1 ospite