La ricerca ha trovato 23306 risultati

da Marco E. Ciriotti
gio 15 nov, 2018 17:08
Forum: Sistematica e classificazione
Argomento: New minerals approved by IMA CNMNC in October and November 2018
Risposte: 8
Visite : 87

Re: New minerals approved by IMA CNMNC in October and November 2018

La jeankempite, dedicata alla curatrice del A. E. Seaman Mineral Museum dal 1975 al 1986, Jean Petermann Kemp Zimmer (1917–2001), potrebbe definirsi il deidratato quasi-polimorfo della guérinite...
da Marco E. Ciriotti
gio 15 nov, 2018 16:35
Forum: Sistematica e classificazione
Argomento: New minerals approved by IMA CNMNC in October and November 2018
Risposte: 8
Visite : 87

Re: New minerals approved by IMA CNMNC in October and November 2018

L'ekebergite, dedicata a Anders Gustav Ekeberg, potrebbe avere analogie con l'achalaite (supergruppo della columbite)?:

Achalaite Fe2+TiNb2O8 mon C2/c 9.422 11.427 5.120 90.00 90.12 90.00 4
Ekebergite Fe2+ThNb2O8 mon P2/c 9.815 5.629 5.224 90.00 93.520 90.00 4
da Marco E. Ciriotti
gio 15 nov, 2018 13:44
Forum: Sistematica e classificazione
Argomento: New minerals approved by IMA CNMNC in October and November 2018
Risposte: 8
Visite : 87

Re: New minerals approved by IMA CNMNC in October and November 2018

Quattro nuove specie italiane: IMA No. 2018-087 Ferriakasakaite-(Ce) CaCeFe3+AlMn2+(Si2O7)(SiO4)O(OH) Monte Maniglia mine, Bellino, Varaita Valley, Cuneo Province, Piedmont, Italy (44°33’42.5”N, 6°54’59.2”E) Cristian Biagioni*, Corrado Balestra, Marco Pasero, Marco E. Ciriotti, Paola Bonazzi and Fed...
da Marco E. Ciriotti
gio 15 nov, 2018 13:32
Forum: Sistematica e classificazione
Argomento: New minerals approved by IMA CNMNC in October and November 2018
Risposte: 8
Visite : 87

New minerals approved by IMA CNMNC in October and November 2018

NEW MINERAL PROPOSALS APPROVED IN OCTOBER 2018 IMA No. 2018-075 Nipalarsite Ni8Pd3As4 Monchetundra layered intrusion (borehole 1819, depth 101.4 m), Kola Peninsula, Russia (67°52’22”, 32°47’60”) Tatiana Grokhovskaya, Oxana Karimova, Anna Vymazalová*, František Laufek, Dmitry Chareev and Victor Rass...
da Marco E. Ciriotti
gio 15 nov, 2018 11:41
Forum: Sistematica e classificazione
Argomento: Jouravskite: refined data on the crystal structure, chemical composition and spectroscopic properties
Risposte: 0
Visite : 14

Jouravskite: refined data on the crystal structure, chemical composition and spectroscopic properties

Prossima pubblicazione. Referenza: ▪ Chukanov, N.V., Zubkova, N.V., Pautov, L.A., Göttlicher, J., Kasatkin, A.V., Van, K.V., Ksenofontov, D.A., Pekov, I.V., Vozchikova, S.A., Pushcharovsky, D.Yu. (2018): Jouravskite: refined data on the crystal structure, chemical composition and spectroscopic prope...
da Marco E. Ciriotti
gio 15 nov, 2018 11:32
Forum: Sistematica e classificazione
Argomento: Silician magnetite from the Copiapó Nordeste Prospect of Northern Chile
Risposte: 0
Visite : 12

Silician magnetite from the Copiapó Nordeste Prospect of Northern Chile

Referenza: ▪ González, E., Kojima, S., Ichii, Y., Tanaka, T., Fujimoto, Y., Ogata, T. (2018): Silician Magnetite from the Copiapó Nordeste Prospect of Northern Chile and Its Implication for Ore-Forming Conditions of Iron Oxide–Copper–Gold Deposits. Minerals , 8 , 529; https://doi.org/10.3390/min8110...
da Marco E. Ciriotti
gio 15 nov, 2018 11:23
Forum: Sistematica e classificazione
Argomento: Structural complexity of natural uranyl sulfates
Risposte: 0
Visite : 14

Structural complexity of natural uranyl sulfates

Prossima pubblicazione. Referenza: ▪ Gurzhyi, V.V. & Plášil, J. (2018): Structural complexity of natural uranyl sulfates Structural complexity of natural uranyl sulfates. Acta Crystallographica , B 74 , (in press). Abstract: Complexity of the crystal structure, which can be measured as the amount of...
da Marco E. Ciriotti
lun 12 nov, 2018 10:58
Forum: Sistematica e classificazione
Argomento: A structure hierarchy for silicate minerals: sheet silicates
Risposte: 1
Visite : 67

Re: A structure hierarchy for silicate minerals: sheet silicates

Credo di ben ricordare che anticipazioni di questo grande lavoro siano state presentate da Frank Hawthorne al Congresso di Rimini del 2016.

Per chi fosse eventualmente interessato è disponibile il PDF.

NB: Le formule di ellingsenite e kampfite sono riviste.
da Marco E. Ciriotti
dom 11 nov, 2018 11:11
Forum: Sistematica e classificazione
Argomento: Structure and reversible hydration/dehydration and thermal expansion of euchlorine
Risposte: 0
Visite : 27

Structure and reversible hydration/dehydration and thermal expansion of euchlorine

Prossima pubblicazione. Referenza: ▪ Siidra, O.I., Borisov, A.S., Lukina, E.A., Depmeier, W., Platonova, N.V., Colmont, M., Nekrasova, D.O. (2018): Reversible hydration/dehydration and thermal expansion of euchlorine, ideally KNaCu3O(SO4)3. Physics and Chemistry of Minerals , 45 , (in press). Abstra...
da Marco E. Ciriotti
dom 11 nov, 2018 10:51
Forum: Sistematica e classificazione
Argomento: IMA 2017-115 = fiemmeite
Risposte: 12
Visite : 510

Re: IMA 2017-115 = fiemmeite

Un articolo sul ritrovamento degli organici della Val di Fiemme sarà su Micro 1/2019.
da Marco E. Ciriotti
sab 10 nov, 2018 14:42
Forum: In libertà
Argomento: Auguri
Risposte: 871
Visite : 45591

Re: Auguri

Tantissimi auguri, Bruno! Buon compleanno!
da Marco E. Ciriotti
sab 10 nov, 2018 14:10
Forum: Sistematica e classificazione
Argomento: Site occupancy of Fe2+, Fe3+ and Ti4+ in "titanomagnetite" determined by valence‐difference contrast synchrotron X‐ray
Risposte: 0
Visite : 40

Site occupancy of Fe2+, Fe3+ and Ti4+ in "titanomagnetite" determined by valence‐difference contrast synchrotron X‐ray

Referenza: ▪ Okube, M., Oshiumi, T., Nagase, T., Miyawaki, R., Yoshiasa, A., Sasaki, S., Sugiyama, K. (2018): Site occupancy of Fe2+, Fe3+ and Ti4+ in titanomagnetite determined by valence‐difference contrast in synchrotron X‐ray resonant scattering. Journal of Synchrotron Radiation , 25 , 1694-1702...
da Marco E. Ciriotti
sab 10 nov, 2018 13:52
Forum: Sistematica e classificazione
Argomento: IMA 2017-074 = hydroxynatropyrochlore
Risposte: 1
Visite : 125

Re: IMA 2017-074 = hydroxynatropyrochlore

Referenza: ▪ Ivanyuk, G.Yu., Yakovenchuk, V.N., Panikorovskii, T.L., Konoplyova, N., Pakhomovsky, Y.A., Bazai, A.V., Bocharov, V.N., Krivovichev, S.N. (2018): Hydroxynatropyrochlore, (Na,Ca,Ce)2Nb2O6(OH), a new member of the pyrochlore group from the Kovdor phoscorite-carbonatite pipe (Kola Peninsul...