 | | Journal (issue) | | 3 Pseudobrookite Twins from the Lemolo Lake Quarry Don Howard and Kent England Pseudobrookite was...the United States. The crystal structure of pseudobrookite is orthorhombic, the most common form being...matter of twinning in pseudobrookite to be considerably in doubt. Pseudobrookite is reported to occur...came as a surprise to find so many twinned pseudobrookite crystals, and not just one type of twin, but...the margins of a boulder in the west end of the quarry that was originally collected in 1982 and 1983 |  | | Journal (issue) | | Ferrierite-NH4 Type locality: Libous Quarry, Chomutov District, Usti and Labern Region, Czech Republic...Teplice District, Usti and Labern Region, Czech Republic Jenisuv Ujerd, Bilna, Teplice District, Usti and...Czech Republic Coal Deposit, Handlova,Prievidza District, Trencin Rejion, Slovakia 3 Martinandresite...small crystals of minerals like osumilite, pseudobrookite, topaz, and phlogopite. The scorias at Obsidian...enstatite, ilmenite, zircon, fluoroedenite, augite, pseudobrookite, hedenbergite and various feldspars together |  | | Journal (article/letter/editorial) | | the abandoned Plavno mine in the Jáchymov ore district, western Bohemia, Czech Republic. The uranium...focused on the mining history of the Jáchymov ore district. The holotype specimen is deposited in the Natural...discovered at the In den Dellen (Zieglowski) pumice quarry, near Mendig, Laach Lake (Laacher See) paleovolcano...Paddlewheelite, a new uranyl carbonate from the Jáchymov District, Bohemia, Czech Republic. Minerals, 8(11), 511...Svornost abandoned underground mine, Jáchymov District, Bohemia, Czech Republic. The mine is one of the |  | Anovitz, Lawrence M., Treiman, Allan H., Essene, Eric J., Hemingway, Bruce S., Westrum, Edgar F., Wall, Victor J., Burriel, Ramón, Bohlen, Steven R. (1985) The heat-capacity of ilmenite and phase equilibria in the system Fe-T-O. Geochimica et Cosmochimica Acta, 49 (10) 2027-2040 doi:10.1016/0016-7037(85)90061-4 | Journal (article/letter/editorial) | | the mineral hongquiite reported from the Tao district in China. This mineral may not be TiO, and it...er for assemblages of ferropseudobrookite-pseudobrookite,, and hematite-ilmenite;. Preliminary application...NAVROTSKY(1975) notes that her measured enthalpy for pseudobrookite, together with the reversal of Haggerty and...the transition temper- The Gibbs energy of pseudobrookite was derived from the reversal by HAGGERTYand...HAGGERTYand LINDSLEY( 1969) on the reaction: Pseudobrookite = Hematite + Rutile FezTi05 = Fe203 + TiOz -14 |  | | Journal (article/letter/editorial) | | 1957;Bowles,1988).Armalcolite is isostructural with pseudobrookite(Psb: Fel*TiOr), which is widespreadin tenestrial...erogg until the IMA reevaluatesthis system. Pseudobrookite will be used as a group name (sensulato) as...Available crystal-chemical data indicate that pseudobrookite and armalcolite are entropy stabilized and...form at high temperatures(Navrotsky, 1975). Pseudobrookite and armalcolite have two crystallographicallydistinct...(1980).Arm : armalcolite, Psb : pseudobrookite. and synthetic pseudobrookite and armalcolite (Lind and Housley |  | | Journal (article/letter/editorial) | | extrusiverocks havebeenfound. The samplesstudiedarefrom a quarry on thesouth jumillite from Spain.The iron contentof...fact exist in rather than magnesium-rich ferro-pseudobrookite. nature.However,the rarity of hyperalkaline...rocks,can explainwhy potassiumriebeckitehas not pseudobrookite on a (Ti,Si)Or-(Fe,Mg,Mn)O-(Al, yet beenreported...armalcolite(Andersonet al, 1970)has been proposedfor a pseudobrookite-like mineral with the generalformulaFe2+o.uMge...Table 3 MnO gives the chemicalanalysisfor the pseudobrookite lio 2 from type III rock. The structuralformula |  | | Journal (issue) | | worth looking at. The minerals found here are pseudobrookite, tridymite, hornblende, hypersthene, and apatite...is present, nor did I find any on my trip. Pseudobrookite is a ferric titanium oxide, Fel+Ti0 5• It forms...and others may resemble snowflakes. After the pseudobrookite, the tridymite is the most interesting present...Hypersthene may be found in vugs alone, or with pseudobrookite, hornblende, and tridymite. In some vugs there...close to either end of the dam. 101 Figure 1 pseudobrookite 100 Figure 2 hypersthene Figure 4 tridymite |  | | Report (issue) | | (Fe3+2Ti)O5 Pseudobrookite Crystal Data: Orthorhombic. Point Group: 2/m 2/m 2/m. Commonly in short...processes in titanium-rich andesite, rhyolite, basalt, etc., and by reactions with xenoliths within these;...Piski, Romania. In Germany, near Mayen, Eifel district. From Riveau Grande, Mt. Dore, Puy-de-Dôme, France...J. and G. Frenzel (1965) Der Chemismus der Pseudobrookite von Vulkaniten. Schweiz. Mineral. Petrog. Mitt...composition of naturally occurring minerals with the pseudobrookite structure. Amer. Mineral., 73, 1377-1383. (4) |  | | Journal (article/letter/editorial) | | petrologically from t h a t exposed in the upper quarry. The officers of the Geological Survey recognized...Exeter district. These rocks were also described in the Survey Memoir on the Plymouth district (Ussher...filled with copper-stained carbonates. In Pocombe quarry two main facies with transitional terms are distinguished...This facies is typically developed at Woolsgrove quarry. The Knowle Hill facies is a phanerocrystalline...occurs at School Wood quarry (at C on fig. 2). At an intermediate level in the quarry, the lava has developed |  | | Journal (article/letter/editorial) | | Volume 98, pages 417–425, 2013 Coexisting pseudobrookite, ilmenite, and titanomagnetite in hornblende...Seattle, Washington 98195, U.S.A. Abstract Pseudobrookite microphenocrysts occur in cognate inclusions...matrix of fresh rhyolitic glass. Grains of pseudobrookite are rimmed by or intergrown with ilmenite....high-Ti lunar basalts. In a unique occurrence, pseudobrookite, and titanomagnetite form a symplectitic intergrowth...ilmenite. Mass balance calculations show that the pseudobrookite + titanomagnetite assemblage is not an isochemical |  | | Journal (article/letter/editorial) | | Synthetic armalcolite and pseudobrookite A. YA. MEOVEDEV Institute of Geochemistry, PB. 4019, 664033...664033 Irkutsk, Russia Abstract Armalcolite and pseudobrookite have been crystallized from synthetic melts...that the composition of the armalcolite and pseudobrookite are dependent on the TiO2 content of the melt...of formation. The maximum A1203 content of pseudobrookite appears to be ~ 1 4 - 1 5 wt.% A1203, a spinel-like...low pO2 and pseudobrookite at higher oxygen fugacities. KEvworms: armalcolite, pseudobrookite, synthetic |  | | Journal (article/letter/editorial) | | Texas 78712 Abstract Crystalsof hematite,pseudobrookite, bixbyite,and cassiterite occur in cavitieswithin...oxide minerals including hematite, bixbyite, pseudobrookite, and cassiterite(Lufkin, 1972, 1974;Lufkin...hematite-cassiterite,hematite-pseudobrookite, and bixbyite-pseudobrookite, are common. This suite of oxide...cassiterite(Staatz and Carr, t964). Pseudobrookite Pseudobrookite(FerTiOb)occursas black, acicular crystafs...crystallographicallydifferent series,e.g., pseudobrookite(orthorhombic) and hematite. And, if hematite |  | | Journal (article/letter/editorial) | | olivine, diopside, apatite, magnetite, and pseudobrookite. The presence and modal abundance of the K2O-bearing...ultrapotassic basanite potassic olivine basalt / : } _ alkali Vi olivine basalt Fio. 1. Distribution of basaltic...slightly enlarged for clarity. The Devils Postpile basalt flow at the eastern margin of the field area yields...ultrapotassic basanite in the west to alkali olivine basalt in the east (Fig. 2). From west to east, K2O decreases...diopside phenocrysts, magnetite, needle-like pseudobrookite, apatite, and ± olivine (Fig. 3). The phlogopite |  | | Journal (article/letter/editorial) | | 1200-1215° in the cores and 1150-1160° in the rims. Pseudobrookite was discovered associated with ilmenite in...Rock-Forming and Accessory Minerals in Gabbro-Norite Pseudobrookite Orthopyroxene core rim Chrome spinel SiO2...mineral phase of the pseudobrookite series (Figs. 3 and 4, and Table). Pseudobrookite, a com plex Fe-Ti...of high-tempera ture oxidation of ilmenite in basalt, rhyolite, ignimbrite, and high-temperature contact...aureoles [8]. High-titanium pseudobrookite has been found in lunar basalt and has been reported in lamproite |  | | Catalog/List | | ANALCITE. Zeolite Group White crystals well covering Basalt. (Talisker Bay, Skye Scotland) lxl 60p lx2 El.30...silvery massive with minor Chalcopyrite (Hingsten Quarry, Cornwall) lx2 El.SO 2x2 E3.00 2x3 E5.00 2 002...BARYTES pure golden brown cleavage. (Fullers earth Quarry Redhill, Surrey) lxl SOp. lx7. f.1.00 218 BAUHHAUERITE...creamywhite micro crystals in cavilies in Natrolite (Saga Quarry,TvedalenNorway) lxl EZ.60 063 BOULANGERITE Pb/5...BYTOWNITE Feldspar group pale green phenocrysts in grey Basalt. (Eycott Cumbria) lx2 .50p 2x2 El.OD 080 CALCITE |  | | Journal (article/letter/editorial) | | Armalcolite, (Fe,Mg)Ti2Os, the new member of the pseudobrookite series, was first discovered in the TiO2rich...pre-existing titanomagnetites and ilmenites to pseudobrookite and hematite [4]. The only terrestrial armalcolite...it is not an armalcolite but a member of the pseudobrookite series. In contrast, lunar armalcolites crystallized...Otting, Amerdingen, Aufhausen and a quarry near Bollstadt. The last quarry has been filled with soil and buried...reaction rim of armalcolite (dark gray). Otting quarry. Length of photograph 100 ~m. Fig. 2, Ilmenite |  | | Journal (article/letter/editorial) | | (2007) 1 – 9 www.elsevier.com/locate/lithos Pseudobrookite-group oxide solutions and basaltic melts Dimitrios...they are not geological oddities. Besides, pseudobrookite oxide solutions may have had a critical role...Ti1+xO5 solutions, and of the known properties of pseudobrookite-group MgTi2O5 suggests that R3+ TiO solutions...reactions between pseudobrookite-group Ti oxide and olivine, orthopyroxene and pseudobrookite-group Ti oxide...Ti-enriched liquids; (3) lack of either ilmenite or pseudobrookite-group Ti oxide saturation in melts, which are |  | | Journal (article/letter/editorial) | | olivine tholeiite, and the 1801 Hualalai alkali basalt, were studied at 5 kb water pressure, 6801000 °C...incongruent in all cases. The Fe-Ti oxides are pseudobrookite and titanohematite; at 1000 °C these oxides...20242 250 ROSALIND T. HELZ—MELTING RELATIONS OF BASALT DESCRIPTION OF BASALTS USED IN THESE EXPERIMENTS...olivine tholeiite, and the 1801 Hualalai alkali basalt. Analyses of these rocks are presented in Table...conditions, the Picture Gorge basalt contains neither Qz and the 1921 Kilauea basalt is olivine-normative. At |  | | Journal (article/letter/editorial) | | ADDITIONAL NOTES ON PSEUDOBROOKITE Cnanles Peracun, Haraard Lrniaersity,Cambridge,Mass. Since the publication...described minute crystals of pseudobrookite from a bore hole in altered basalt at HessenbriickerHammers,...the newer quarries there, minute crystals of pseudobrookite are numerous associated with secondarv phosphate...parallel growths which were found in the lot of pseudobrookite describedin my first paper. One of the specimens...specimens which he sent me consisted of pseudobrookite needlesattached to the surface of the basal plane |  | Pekov, Igor V., Lykova, Inna S., Yapaskurt, Vasiliy O., Belakovskiy, Dmitry I., Turchkova, Anna G., Britvin, Sergey N., Sidorov, Evgeny G., Scheidl, Katharina S. (2019) New arsenate minerals from the Arsenatnaya fumarole, Tolbachik volcano, Kamchatka, Russia. XI. Anatolyite, Na6(Ca,Na)(Mg,Fe3+)3Al(AsO4)6. Mineralogical Magazine, 83 (5) 633-638 doi:10.1180/mgm.2019.11 | Journal (article/letter/editorial) | | Vienna, Althanstrasse 14 (UZA 2), A-1090 Vienna, Austria *E-mail: igorpekov@mail.ru Running title: Anatolyite...anhydrite, wulffite, krasheninnikovite, fluoborite, pseudobrookite, and fluorophlogopite. Anatolyite occurs as...a result of the interaction between hot gas and basalt scoria at the temperature not lower than 420–450ºC...gas seems a carrier of As, Na and Fe while the basalt scoria was the most probable source of Mg, Al and...anhydrite, wulffite, krasheninnikovite, fluoborite, pseudobrookite, and fluorophlogopite. Anatolyite occurs as |  | | Journal (issue) | | A. Wilson Selected Minerals from the Volcanic District of Laacher See, Germany.........................served as The first probings in the Lengenbach quarry BINNA VALLEY. cook while Leopold Jentsch was the...operations. 99% of the material) was carried out of the quarry in wooden The contract with the Englishmen encountered...it hindered the work in the deeper parts of the quarry. iron, not minerals. Only later, at the beginning...from and the English Professor R. H. Solly to the quarry almost Binn participated in the company including: |  | | Journal (article/letter/editorial) | | BIXBYITE AND PSEUDOBROOKITE FROM THE TIN-BEARING RHYOLITE OF THE BLACK RANGE, NEW MEXICOX Cenl Fnrns...third verified occurrence for the mineral. Pseudobrookite, Fe:Os.TiOz, occurs in cavities widely distributed...review of the occurrences for bixbyite and for pseudobrookite indicates that the minerals have not been found...tiny slightly radiating groups of crystals of pseudobrookite were found in the tin-bearing rhyolite of the...mm. on the edge were collected. Specimens of pseudobrookite were collected from only one locality. GBorocv |  | Stahle, V., Koch, M., McCammon, C. A., Mann, U., Markl, G. (2002) OCCURRENCE OF LOW-Ti AND HIGH-Ti FREUDENBERGITE IN ALKALI SYENITE DIKES FROM THE KATZENBUCKEL VOLCANO, SOUTHWESTERN GERMANY. The Canadian Mineralogist, 40 (6) 1609-1627 doi:10.2113/gscanmin.40.6.1609 | Journal (article/letter/editorial) | | exsolutionlamellae within hematite grains. Pseudobrookite, ilmenite, hematite or magnetite occur as Fe–Ti...d’exsolution au sein de cristaux d’hématite. La pseudobrookite, l’ilménite, l’hématite ou la magnétite sont...and magnetite, lenses of sulfide minerals, pseudobrookite and hematite pockets as well as tuffaceous...1609 40#6-déc-02-2443-06 1611 1611 Michelsberg quarry (Alter Gemeindesteinbruch; see Frenzel 1955, 1960)...collected recently at the abandoned Michelsberg quarry. ANALYTICAL PROCEDURES Mineral analyses were performed |  | | Journal (article/letter/editorial) | | Johanngeorgenstadt, kammererite, metavauxite, phenakite, pseudobrookite, realgar, senarmontite, Boron, Calif, minerals...babingtonite xls from the New Haven Traprock Co. quarry on the Wallingford-Durham Rd. in Conn., supplied...quartz xls found by Ben Hayes; a series of Arizona basalt minerals — natrolite, analcite, chabazite, and...and wulfenite; erythrite-azurite-tyrolite from Austria; erythrite and wulfenite from Morocco; and a new |  | | Journal (article/letter/editorial) | | H~GOEI~TY: abundance. The lava is a typical olivine basalt. Felspar phenocrysts show slight alteration to...accompanied initially b y futile and subsequently b y pseudobrookite. Figs. 7--14. Reflected tightphotomierographsshowing...Ilmenite; ml Metailmenite; H Titanohematite; P Pseudobrookite; R Ruffle; Sp Spinel; y Maghemite; S Silicate...257 The higher titanium phases (rutfle and pseudobrookite) form preferentially after ilmenite. Within...as an end product complete pseudomorphs of pseudobrookite with minor subgraphic intergrowths of rutile |
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