Browsing ELibrary by Author "Ferraris G."

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COMPARATIVE CRYSTAL CHEMISTRY OF GEMINITE CU[ASO3OH]H2O AND THE MINERALS ASSOCIATED WITH IT

Principe M.; Pushcharovskiy D.Yu.; Sarp M.; Ferraris G. (1996)

The structure of geminite was studied and compared with that of arsenates of Zn, Co, Mn, and Ca which are chemically close to it. The structural investigation was carried out on a single crystal of geminite from Salcine ...
EFFECTS OF THE STACKING FAULTS ON THE CALCULATED ELECTRON DENSITY OF MICA POLYTYPES - THE ĎUROVIč EFFECT

Nespolo M.; Ferraris G. (2001)

The occurrence of residues in the Fourier map of OD structures (polytypes in which pairs of building modules are geometrically equivalent) in the positions of the 'virtual atoms' of the corresponding family structure derives ...
FERRIALLANITE-(CE), CACEFE3+ALFE2+(SIO4 (SI2O7)O(OH), A NEW MEMBER OF THE EPIDOTE GROUP: DESCRIPTION, X-RAY AND MöSSBAUER STUDY

Kartashov P.M.; Ferraris G.; Ivaldi G.; Sokolova E.; McCammon C.A. (2002)

Ferriallanite-(Ce), ideally CaCeFe3+AlFe2+(SiO4 (Si2O7)O(OH), is the analogue of allanite-(Ce) with Fe3+ dominant in the octahedral site M(1). It is of metasomatic origin and occurs in an alkaline granitic pegmatite of ...
FIRST STRUCTURE DETERMINATION OF AN MDO-2O MICA POLYTYPE ASSOCIATED WITH A 1M POLYTYPE

Ferraris G.; Gula A.; Ivaldi G.; Nespolo M.; Sokolova E.; Uvarova Y.; Khomyakov A.P. (2001)

The structure refinement of associated phlogopite-2O and phlogopite-IM from the Khibiny massif (Kola Peninsula, Russia) is reported. Crystal data are: a = 5.2781(5), b = 9.141(1), c = 20.124(4) Angstrom, Ccmm (2O); a = ...
KALIFERSITE, A NEW ALKALINE SILICATE FROM KOLA PENINSULA (RUSSIA) BASED ON A PALYGORSKITE-SEPIOLITE POLYSOMATIC SERIES

Ferraris G.; Belluso E.; Khomyakov A.P.; Soboleva S.V. (1998)

Kalifersite, (K, Na)5(Fe3+)7[Si20O50](OH)6 · 12H2O, is a new [001] fibrous silicate discovered in a drill core of a hydrothermally altered pegmatite in the urtite series at Mt. Kukisvumchorr (Kola Peninsula). The new mineral ...
NAFERTISITE, A LAYER TITANOSILICATE MEMBER OF A POLYSOMATIC SERIES INCLUDING MICA

Ferraris G.; Ivaldi G.; Belluso E.; Khomyakov A.P.; Soboleva S.V.; Pavese A. (1996)

Nafertisite, (Na,K)(3)(Fe2+,Fe3+,square)(10)[Ti-2(Si,Fe3+,Al)(12)O-37](OH,O)(6), is an alkaline titanosilicate from the Khibina massif (Kola Peninsula, Russia). It is monoclinic A2/m with a = 5.353(4), b = 16.176(12), c = ...
NOMENCLATURE OF AMPHIBOLES: ADDITIONS AND REVISIONS TO THE INTERNATIONAL MINERALOGICAL ASSOCIATION'S 1997 RECOMMENDATIONS

Leake B.E.; Woolley A.R.; Birch W.D.; Burke E.A.J.; Ferraris G.; Grice J.D.; Hawthorne F.C.; Kisch H.J.; Krivovichev V.G.; Schumacher J.C.; Stephenson N.C.N.; Whittaker E.J.W. (2003)

The introduction of a fifth group of amphiboles, the Na-Ca-Mg-Fe-Mn-Li group, defined by 0.50 < (B)(Mg,Fe2+,Mn2+,Li) < 1.50 and 0.50 less than or equal to (B)(Ca,Na) less than or equal to 1.50 atoms per formula unit, with ...
NOMENCLATURE OF AMPHIBOLES: ADDITIONS AND REVISIONS TO THE INTERNATIONAL MINERALOGICAL ASSOCIATION'S AMPHIBOLE NOMENCLATURE

Leake B.E.; Woolley A.R.; Birch W.D.; Burke E.A.J.; Ferraris G.; Grice J.D.; Hawthorne F.C.; Kisch H.J.; Krivovichev V.G.; Schumacher J.C.; Stephenson N.C.N.; Whittaker E.J.W. (2004)

The introduction of a fifth amphibole group, the Na-Ca-Mg-Fe-Mn-Li group, defined by 0.50 < (B)(Mg,Fe2+,Mn2+,Li) < 1.50 and 0.50 less than or equal to (B)(Ca,Na) less than or equal to 1.50 apfu (atoms per formula unit), ...
POLYSOMATIC ASPECTS OF MICROPOROUS MINERALS - HETEROPHYLLOSILICATES, PALYSEPIOLES AND RHODESITE-RELATED STRUCTURES

Ferraris G.; Gula A. (2005)

Several structural families reported in this book can be described by using concepts of modular crystallography (Thompson 1978; Veblen 1991; Merlino 1997; Ferraris et al. 2004). This chapter presents three groups of ...
SHIROKSHINITE, K(NAMG2 SI4O10F2, A NEW MICA WITH OCTAHEDRAL NA FROM KHIBINY MASSIF, KOLA PENINSULA: DESCRIPTIVE DATA AND STRUCTURAL DISORDER

Pekov I.V.; Pushcharovsky D.Yu.; Chukanov N.V.; Ferraris G.; Ivaldi G.; Zadov A.E. (2003)

Shirokshinite, K(NaMg2)Si4O10F2, is the analogue of tainiolite, K(LiMg2)Si4O10F2, with the M1 octahedron fully occupied by Na instead of Li. It was found in the Kirovskii underground apatite mine (Kukisvumchorr Mountain, ...
STRUCTURAL FEATURES OF MICAS

Ferraris G.; Ivaldi G. (2002)

The large number of mica species (end-members) and varieties is based on chemical variability and peculiar structural features like polytypism, local and global symmetry. In addition, mainly because of an inherent misfit ...
The crystal structure of ilímaussite-(Ce), (Ba,Na)10K3Na4.5Ce5(Nb,Ti)6[Si12O36][Si9O18(O,OH)24]O6, and the "ilímaussite" problem

Ferraris G.; Gula A.; Zubkova N.V.; Pushcharovsky D.Yu.; Gobetchiya E.R.; Pekov I.V.; Eldjarn K. (2004)

The crystal structure of ilimaussite-(Ce), (Ba,Na)(10)K3Na4.5Ce5(Nb,Ti)(6)[Si12O36][Si9O18(O,OH)(24)]O-6, from the type locality, the Ilimaussaq alkaline complex, South Greenland, has been solved and refined to R = 0.11 ...
THE CRYSTAL STRUCTURE OF SEIDITE-(CE), NA4(CE, SR)2{TI(OH)2(SI8O18)

Ferraris G.; Belluso E.; Gula A.; Soboleva S.V.; Khomyakov A.P. (2003)

Seidite-(Ce), Na4(Ce,Sr)2{Ti(OH 2(Si8O18)}(O,OH,F 4,•5H2O, is a titanosilicate recently discovered in the Yubileynaya pegmatite at Mount Karnasurt, Lovozero alkaline massif, Kola Peninsula, Russia. Grains consist of ...
THE NOMENCLATURE OF EUDIALYTE-GROUP MINERALS

Johnsen O.; Ferraris G.; Gault R.A.; Grice J.D.; Kampf A.R.; Pekov I.V. (2003)

This is the final report on the nomenclature of eudialyte-group minerals by the Eudialyte Nomenclature Subcommittee established by the Commission on New Minerals and Mineral Names of the International Mineralogical ...

Browsing ELibrary by Author "Ferraris G."

Browsing ELibrary by Author "Ferraris G."

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