 | Novák, Milan, Cempírek, Jan, Gadas, Petr, Škoda, Radek, Vašinová Galiová, Michaela, Pezzotta, Federico, Groat, Lee A. (2015) Boralsilite and Li, Be-bearing "Boron Mullite" Al8B2Si2O19, Breakdown products of spodumene from the Manjaka pegmatite, Sahatany valley, Madagascar. The Canadian Mineralogist, 53 (2) 357-374 doi:10.3749/canmin.1400092 | Journal (article/letter/editorial) | | 357-374 (2015) DOI: 10.3749/canmin.1400092 BORALSILITE AND Li,Be-BEARING “BORON MULLITE” Al8B2Si2O19...PRODUCTS OF SPODUMENE FROM THE MANJAKA PEGMATITE, SAHATANY VALLEY, MADAGASCAR MILAN NOVÁK§ Department of...Mall, Vancouver, BC, V6T 1Z4 Canada ABSTRACT Boralsilite Al16B6Si2O37 and Li,Be-bearing “boron mullite”...from the elbaite-subtype Manjaka granitic pegmatite, Sahatany Valley, Madagascar. The pegmatite mineral...contains thin reaction zones (Tur+Phl±Brl). Boralsilite assemblages are closely associated with prismatic |  | Cempírek, Jan, Grew, Edward S., Kampf, Anthony R., Ma, Chi, Novák, Milan, Gadas, Petr, Škoda, Radek, Vašinová-Galiová, Michaela, Pezzotta, Federico, Groat, Lee A., Krivovichev, Sergey V. (2016) Vránaite, ideally Al16B4Si4O38, a new mineral related to boralsilite, Al16B6Si2O37, from the Manjaka pegmatite, Sahatany Valley, Madagascar. American Mineralogist, 101 (9) 2108-2117 doi:10.2138/am-2016-5686 | Journal (article/letter/editorial) | | related to boralsilite, Al16B6Si2O37, from the Manjaka pegmatite, Sahatany Valley, Madagascar Jan Cempírek1...occurring naturally, boromullite, Al9BSi2O19, and boralsilite, Al16B6Si2O37, as well as synthetic compounds...elbaite-subtype Manjaka granitic pegmatite, Sahatany Valley, Madagascar. Boralsilite also occurs in this...(“superior”). Assemblages with vránaite and boralsilite are inferred to represent initial reaction products...limit diffusion rates. Keywords: Vránaite, boralsilite, Madagascar, pegmatite, new mineral, structural complexity |  | Gadas, Petr, Novák, Milan, Škoda, Radek, Cempírek, Jan, Zachař, Adam, Flégr, Tomáš, Pezzotta, Federico (2019) Titanium in tourmalines from granitic pegmatites and their exocontacts. The Canadian Mineralogist, 57 (5) 745-747 doi:10.3749/canmin.ab00011 | Journal (article/letter/editorial) | | Moldanubian Zone, Czech Republic (Novák et al. 2011); (ii) schorl to bosiite as a product of hydrothermal replacement...spodumene and calc-silicate rock at Manjaka, Sahatany Valley, Madagascar (Novák et al. 2015). RESULTS Concentrations...59, and 0.64 apfu, in the Třebı́č pegmatites, Manjaka and Řečice, respectively. The X-site is mostly...the Ti substitution may be similar to that in Manjaka, with significant Fe2þ and Fe3þ instead of Mg and...elevated K (0.17 apfu). The mineral assemblage from Manjaka pegmatite exocontact is very complex and besides |  | | Journal (article/letter/editorial) | | (at Tamponilapa and Tsarafara-Nord, Sahatany Valley, Madagascar) and paragneisses (at Ctidružice, Moldanubian...Novák Tamponilapa and Tsarafara-Nord, Sahatany Valley, Madagascar and Ctidružice, Moldanubian Zone, Czech...Pegmatite fields of Central Madagascar The pegmatites of the Sahatany Valley pegmatite field are located...north-eastern part of the Itremo Region, Central Madagascar built by low- to medium-grade metamorphic rocks...dominance of elbaite-subtype pegmatites in this district (see Ranorosoa 1986; Novák et al. 2015a). Mineral |  | | Journal (article/letter/editorial) | | Al16B4Si4O38 Manjaka pegmatite, Sahatany Valley pegmatite field, 25 km SW of Antsirabe, Itremo Region...Region, Madagascar (20°04′35″S, 46°57′09″E) Jan Cempírek, Edward S. Grew*, Anthony R. Kampf, Chi Ma, Milan... Groat *E-mail: esgrew@maine.edu Related to boralsilite and boromullite Monoclinic: I2/m; structure determined...Na6(UO2)(SO4)4·4H2O Blue Lizard Mine, Red Canyon, White Canyon District, San Juan Co., Utah, USA (37°33′26″N, 110°17′44″W)...Na6(UO2)(SO4)4·4H2O Blue Lizard Mine, Red Canyon, White Canyon District, San Juan Co., Utah, USA (37°33′26″N, 110°17′44″W) |  | | Journal (issue) | | collectors." Petedunnite, Franklin, Franklin Mining District, Sussex Co., New Jersey However, Pete demonstrated...and Sterling Hill ( 1765-1 900), each constituted a Ii Fe's w ork that has been cited as the " unmatched...light cornice, and sliding glass doors are slam ,ii:, specially priced at just $2,899, FOB factory. Full...Mine is about one mile south ofthe town of Pioche. II is on the east side of the Ely Range, a.k.a. The...who also own the Wide Awake Mine in the District, The Ely Valley Mine, The Medha Mine and the Godbe Mill |  | | Journal (article/letter/editorial) | | related to boralsilite, Al16B6Si2O37, from the Manjaka pegmatite, Sahatany Valley, Madagascar. Am. Mineral..., Papineau, D., Ralph, J.P., Sverjensky, D.A., Valley, J.W. (2011): Needs and opportunities in mineral |  | Novák, M., Prokop, J., Losos, Z., Macek, I. (2017) Tourmaline, an indicator of external Mg-contamination of granitic pegmatites from host serpentinite; examples from the Moldanubian Zone, Czech Republic. Mineralogy and Petrology, 111 (4) 625-641 doi:10.1007/s00710-017-0512-4 | Journal (article/letter/editorial) | | rocks (group A) of anatectic or metasomatic origin, (ii) subhomogeneous to simply zoned barren pegmatite...of pegmatite solidification (Novák et al. 2012); (ii) post-emplacement stage of contamination of pegmatite...structure in various pressuretemperature conditions, (ii) common occurrence in different stages of pegmatite...orthogneiss, quartzite, amphibolite is overlain by (ii) the Varied group, Tourmaline, an indicator of...2015b): (i) pre-Variscan (metamorphosed) pegmatites; (ii) several types of simple anatectic (abyssal) pegmatites; |  | Zolotarev, , Krivovichev, , Panikorovskii, , Gurzhiy, , Bocharov, , Rassomakhin, (2019) Dmisteinbergite, CaAl2Si2O8, a Metastable Polymorph of Anorthite: Crystal-Structure and Raman Spectroscopic Study of the Holotype Specimen. Minerals, 9 (10) 570 doi:10.3390/min9100570 | Journal (article/letter/editorial) | | disordered structure having the P63 /mcm symmetry; (ii) degree of disorder of the O sites, which may have...uniqueobserved observed reflections reflections with with II ≥ ≥ 2σ(I) using for using the the ShelX ShelX program...tetrahedral with completely structure thesymmetry; P63/mcm (ii) degree of disorder of the O sites (particularly...which have a direct influence upon the symmetry; (ii) degree of disorder of the O sites (particularly...related to boralsilite, Al16 B6 Si2 O37 , from the Manjaka pegmatite, Sahatany Valley, Madagascar. Am. Mineral |  | Čopjaková, Renata, Prokop, Jiří, Novák, Milan, Losos, Zdeněk, Gadas, Petr, Škoda, Radek, Holá, Markéta (2021) Hydrothermal alteration of tourmaline from pegmatitic rocks enclosed in serpentinites: Multistage processes with distinct fluid sources. Lithos, 380. 105823pp. doi:10.1016/j.lithos.2020.105823 | Journal (article/letter/editorial) | | particularly in the more evolved pegmatites, and (ii) fluids infiltrated/diffused from host rocks (Mg...Oslavany II) and more evolved, complexly zoned pegmatite dikes with Be -p minerals (Věžná II, Věžná I);...calc-silicate rocks. Both ro groups are overlain by (ii) the structurally highest Gföhl Unit comprising felsic...(metamorphosed) pegmatites (Novák et al., 2013); (ii) several types of simple anatectic (abyssal) pegmatites...fragments of the pegmatite Nová Ves near Oslavany II have the same mineral assemblage (Kfs+Ab+Qz±Ms I |  | | Journal (article/letter/editorial) | | hydrothermal beryl II and phenakite II occur in miarolitic pockets (paragenetic type II). Secondary hydrothermal...elevated contents of Na, Cs, Mg, Fe, Sc in beryl I and II; Na, Ca, Mg, Fe, Al in bazzite III; REE in milar...magmatic Be-minerals within a single pegmatite district is exceptional and it is constrained by variable...Kožichovice I,II; POZ – Pozďátky; KLU – Klučov III; OKR – Okrašovice; CIM – Číměř I,II; KRA – Kracovice...geochemically primitive allanite-type pegmatites, and (ii) more evolved euxenite-type pegmatites (Novák et |  | | Journal (article/letter/editorial) | | prismatine, grandidierite, dumortierite and boralsilite, all considered to be primary. Fitzsimons (1996)...massif, in pegmatite dikes exposed in the Cannobina Valley, for example (A. Guastoni, pers. commun., 2004)...change where the degree of metamictization is low), Valley (2003) found that one could expect a decodable...anatexis” (Černý 1992). The important findings of Valley (2003) indicate that the sources of Archean granites...the Borborema belt in Brazil, and in the Pala District of southern California. The spatial association |  | | Report (volume) | | (Dingwell et al., Chapter 8). One such phase, boralsilite, has recently been discovered in pegmatites (Grew...Spositio, George H. Swihart, John A. Tossell, John W. Valley, David J. Waters. Assistance from John Jambor,...£ in u ^r I § » § X K c • s e s ' S y .ii o •5 o & g i ! | o c •g f2 P qj s "C a — c ¿...^ /b l_ id u td u «> JEOC g2 ^«3 -oup. uaM iMo ii a (N O CQ a o ...3 r- « .S.S .E.E s - 5 f t J 3 S S - s Q Q ii O 3 S « 4S •X 1 i 2 CO B 3 § X .5 s • S |  | | Book (edition) | | dept. (departement), dept. (departamento), dist. (district). Less common terms are not abbreviated, e.g....byssolite. Mono- coast of North America: Kobuk River Valley, Alaska, clinic, C2/m, a,b,c = 9.89, 18.20, 5.31...e.g. on Grossgreiner Mt., overlooking Zillertal Valley, Tirol, Austria, and at Passo di Vizze, Trentino-Alto...western Sayan Mts., white at Burumskoye, Vitim River Valley, all Siberia, Russia. In many localities in New...Ambohitromby and Tongfeno, S of Betafo, both Madagascar. Tabular crystals to 1 cm in Alpine fissures |
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