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  • 1
    Electronic Resource
    Electronic Resource
    Reconstruction of Bray Weir on the River Thames (1998)
    Oxford, UK : Blackwell Publishing Ltd
    Water and environment journal 12 (1998), S. 0 
    Details
    ISSN: 1747-6593
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Bray Weir on the River Thames near Maidenhead was refurbished during the summers of 1993 and 1994. The existing structure, which had become unsound and unsafe to operate, was replaced by nine vertical-lift (or buck) gates. Construction works within a cofferdam and utilizing floating plant were undertaken in two phases. Following demolition of the existing weir, a network of reinforced concrete beams was supported on new driven piled foundations. Twin leaf gates slide in guides and span between new steel A-frames, and are lifted by pairs of threaded spindles rotated by actuators operating through gearboxes. Fine flow control is achieved by allowing overtopping of the upper leaves of the gates. Following commissioning, operational difficulties resulting from seal vibration and excessive friction on the spindles necessitated design modifications.This paper outlines a brief history of the site, the design options considered, the contract strategy employed, and includes a description of the construction phase and subsequent postcommissioning aspects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1747-6593.1998.tb00153.x
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  • 2
    Electronic Resource
    Electronic Resource
    Contemporary global horizontal crustal motion (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical journal international 119 (1994), S. 0 
    Details
    ISSN: 1365-246X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: An analysis of Satellite Laser Ranging (SLR) data to the LAGEOS satellite has yielded improved estimates of the horizontal motion for a subset of 34 tracking sites within the global tracking network. The analysis, called SL8.3, utilized data acquired between 1980 January and 1993 June by the global network composed of 71 sites. The solution design provides for the simultaneous estimation of site positions and their velocities within a pre-defined kinematic frame. The solution is statistically rigorous and retains the full correlation information content. Least-squares estimates of relative poles of rotation, which are used to model the motion of one plate relative to another, were made based on the SLR estimated velocities for sites known to be well away from deformation zones. The resulting SLR-based relative rotation poles differ slightly from those of NUVEL-1, but in general, indicate that the magnitude of the SLR implied velocities is slower than those implied by NUVEL-1, consistent with the 4–5 per cent slowing in relative spherical rates noted in earlier comparisons. Spherical rates between sites in western North America support models of extension in the Basin and Range Province and the rotation of the Sierra Nevada microplate. An analysis of the spherical rates crossing the North Atlantic shows that SL8.3 estimated extension between North America-Eurasia sites is generally smaller than those implied by NUVEL-1: meanwhile SL8.3 rates between North America-Africa sites are in better agreement with NUVEL-1, although they are not so well determined. The maintenance and ongoing monitoring of global SLR site kinematics provides a well-defined global reference which will aid in combination global kinematic solutions where information from other technologies are merged (e.g. Very Long Baseline Interferometry and Global Positioning System) and in providing the context for densification studies of regional kinematics derived from terrestrial and Global Positioning System observations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-246X.1994.tb00138.x
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  • 3
    Electronic Resource
    Electronic Resource
    Stormwater Contamination at Airports and Remedial Option – with Particular Reference to Stansted (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Water and environment journal 1 (1987), S. 0 
    Details
    ISSN: 1747-6593
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1747-6593.1987.tb01223.x
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  • 4
    Electronic Resource
    Electronic Resource
    Koritnigit, Zn[H2O|HOAsO3], ein neues Mineral aus Tsumeb, Südwestafrika (1979)
    Springer
    Mineralogy and petrology 26 (1979), S. 51-58 
    Details
    ISSN: 1438-1168
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Description / Table of Contents: Summary The new mineral koritnigite is a hydrated zinc hydrogen arsenate with the formula Zn[H2O|HOAsO3]. Chemical analysis (electron microprobe and t.g.a.) gave: As2O5 51.75%, ZnO 35.97%, and H2O 12.3%, total 100.0%. The HOAsO3 ions were determined by IR spectroscopy. Koritnigite is soluble in cold diluted HCl and HNO3. The unit cell dimensions are:a 0=7.948(2),b 0=15.829(5),c 0=6.668(2)Å, α=90.86(2), β=96.56(2), γ=90.05(2)o,V=833.2(4) Å3,Z=8. The space group is $$P\bar 1$$ . The strongest lines of the powder pattern are: 7.90(10) (020, 100), 3.83(7) ( $$2\bar 10,210$$ ), 3.16(9) ( $$2\bar 11,211,2\bar 30,230$$ ), 2.926(4) (150), 2.679(4) ( $$20\bar 2,24\bar 1$$ ), 2.461(6) ( $$2\bar 50,250$$ ), 2.186(5) ( $$3\bar 40,10\bar 3$$ ), 1.969(4)(400), 1.649(3) (004).
    Notes: Zusammenfassung Das neue Mineral Koritnigit ist ein wasserhaltiges Zinkhydrogenarsenat der Formel Zn[H2O|HOAsO3]. Die chemische Analyse (Elektronenmikrosonde und T.G.A.) ergab: As2O5 51,75%, ZnO 35,97% und H2O 12,3%, Summe 100,0%. Die HOAsO3-Ionen wurden IR-spektroskopisch nachgewiesen. Koritnigit ist löslich in kalter, verdünnter HCl und HNO3. Die Gitterkonstanten sind:a 0=7,948(2),b 0=15,829(5),c 0=6,668(2) Å, α=90,86(2), β=96,56(2), γ=90,05(2)o,V=833,2(4)Å3,V=8. Die Raumgruppe ist $$P\bar 1$$ . Die stärksten Linien des Pulverdiagramms sind: 7,90(10) (020,100), 3,83(7) ( $$2\bar 10,210$$ ), 3,16(9) ( $$2\bar 11,211,2\bar 30,230$$ ) 2,926(4) (150), 2,679(4) ( $$20\bar 2,24\bar 1$$ ), 2,461(6) ( $$2\bar 50,250$$ ), 2,186(5) ( $$3\bar 40,10\bar 3$$ ), 1,969(4) (400), 1,649(3) (004). Koritnigit ist wasserklar bis durchscheinend weiß. Idiomorphe Kristalle sind nicht bekannt. Die Spaltbarkeit nach {010} ist ausgezeichnet und auf {010} sind Spaltspuren nach [001] und nach [100] erkennbar. Härte 2.G=3,54 g·cm−3,D x =3,56 g·cm−3. Koritnigit ist optisch zweiachsig positiv, 2V≈70(5)o. Die Werte der Lichtbrechung sind:n α=1,632(5),n β=1,652(3) undn γ=1,693(3). Koritnigit wurde auf der 31. Sohle der Tsumeb-Mine, Südwestafrika gefunden. Er kommt als Sekundärmineral in Paragenese mit Cu-Adamin, Stranskiit und drei weiteren, vorerst nicht identifizierten mineralen in Zersetzungshohlräumen von Tennantit vor.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01081290
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  • 5
    Electronic Resource
    Electronic Resource
    Die Ladungsbilanz für eine verfeinerte Kristallstruktur von Stranskiit, Zn2 Cu(AsO4)2 (1979)
    Springer
    Mineralogy and petrology 26 (1979), S. 167-174 
    Details
    ISSN: 1438-1168
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Description / Table of Contents: Summary The crystal structure of stranskiite was refined with new intensity data obtained from a specimen from Tsumeb toR=0.034 for 1234 observed independent reflections. The charge balance was calculated and discussed particularly with respect of the charge deformation of Cu2+. An electron probe microanalysis gave the result that the actual composition of the specimen corresponds to the given formula.
    Notes: Zusammenfassung Die Kristallstruktur des Stranskiits wurde mit neuen Meßdaten, die an einer aus Tsumeb stammenden Probe gewonnen worden waren, bis zuR=0,034 für 1239 unabhängige beobachtete Reflexe verfeinert. Von der verfeinerten Struktur wurde die Ladungsbilanz aufgestellt und besonders im Hinblick auf die Ladungsdeformation des Cu2+ diskutiert. Eine Mikrosondenanalyse derselben Probe ergab, daß die tatsächliche Zusammensetzung der angegebenen Formel entspricht.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01081843
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  • 6
    Electronic Resource
    Electronic Resource
    Johillerit, Na(Mg, Zn)3 Cu(AsO4)3, ein neues Mineral aus Tsumeb, Namibia (1982)
    Springer
    Mineralogy and petrology 29 (1982), S. 169-175 
    Details
    ISSN: 1438-1168
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Description / Table of Contents: Summary Electron microprobe analysis of the new mineral johillerite gave Na2O 5.4, MgO 18.3, ZnO 5.4, CuO 15.8, and As2O5 55.8, total 100.7%. From this result, the ideal formula is given as Na(Mg, Zn)3 Cu(AsO4)3. Johillerite crystallizes monoclinic,C2/c. The unit cell dimensions are:a=11.870(3),b=12.755 (3),c=6.770 (2) Å, β=113.42 (2)°,Z=4. The strongest lines on the X-ray powder diffraction pattern are: 4,06 (5) (22 $$\bar 1$$ ), 3,50 (4) (310), 3,25 (8) (11 $$\bar 2$$ ), 2,75 (10) (330, 240), 2,64 (5) (311, 13 $$\bar 2$$ , 40 $$\bar 2$$ ), 1,952 (4) (13 $$\bar 3$$ , 35 $$\bar 2$$ ), 1,682 (4) (20 $$\bar 4$$ , 460), 1,660 (5) (40 $$\bar 4$$ , 71 $$\bar 1$$ , 550, 64 $$\bar 2$$ ), 1,522 (4) (442, 153, 13 $$\bar 4$$ ). There is a close relationship between johillerite, o'danielite, Na(Zn, Mg)3H2(AsO4)3, and some synthetic compounds. Johillerite is violet in colour, transparent. Cleavage is {010} perfect, {100} and {001} good.H (Mohs)∼3.D=4.15 andD X =4.21 g·cm−3. The mineral is optically biaxial positive, 2V∼80 (5)°. The refractive indices are:n α=1.715 (4),n β=1.743 (4),n γ=1.783 (4). The extinction isn γ‖b and on (010)n α⋏c∼16°. Strongly pleochroic with axial coloursX=violet-red,Y=bluish violet andZ=greenish blue. The new mineral was found in radiated masses together with cuprian adamite and conichalcite in an oxidized copper ore from Tsumeb, Namibia. It is named in honour of Prof. Dr.J.-E. Hiller (1911–1972).
    Notes: Zusammenfassung Die chemische Analyse des neuen Minerals Johillerit mit der Elektronenmikrosonde ergab: Na2O 5,4, MgO 18,3, ZnO 5,4, CuO 15,8 und As2O5 55,8, Summe 100.7%. Aus diesem Ergebnis wurde die idealisierte Formel Na(Mg, Zn)3 Cu(AsO4)3 abgeleitet. Johillerit ist monoklin mit der RaumgruppeC2/c. Die Gitterkonstanten sind:a=11,870 (3),b=12,755 (3),c=6,770 (2) Å, β=113,42 (2)°,Z=4. Die stärksten Linien des Pulverdiagramms sind: 4,06 (5) (22 $$\bar 1$$ ), 3,50 (4) (310), 3,25 (8) (11 $$\bar 2$$ ), 2,75 (10) (330, 240), 2,64 (5) (311, 13 $$\bar 2$$ , 40 $$\bar 2$$ ), 1,952 (4) (13 $$\bar 3$$ , 35 $$\bar 2$$ ), 1,682 (4) (20 $$\bar 4$$ , 460), 1,660 (5) (40 $$\bar 4$$ , 71 $$\bar 1$$ , 550, 64 $$\bar 2$$ ), 1,522 (4) (442, 153, 13 $$\bar 4$$ ). Es bestehen enge strukturelle Beziehungen zwischen Johillerit und O'Danielit, Na(Zn, Mg)3H2(AsO4)3, sowie einigen synthetischen. Verbindungen. Johillerit ist violett durchscheinend. Die Spaltbarkeit nach {010} ist ausgezeichnet und nach {100} und {001} gut.H (Mohs)∼3.D=4,15 undD X =4,21 g·cm−3. Das Mineral ist optisch zweiachsig positiv, 2V∼80 (5)°. Die Werte der Lichtbrechung sindn α=1,715 (4),n β=1,743 (4) undn γ=1,783 (4). Die Auslöschung istn γ‖b und auf (010)n α⋏c≃16°. Johillerit ist stark pleochroitisch mit den AchsenfarbenX=violett-rot,Y = blauviolett undZ = grünblau. Das neue Mineral kommt in radialstrahligen Massen gemeinsam mit kupferhaltigem Adamin und Konichalcit in zersetzem Kupfererz von Tsumeb, Namibia, vor. Die Benennung erfolgte nach Prof. Dr.J.-E. Hiller (1911–1972).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01084640
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  • 7
    Electronic Resource
    Electronic Resource
    Formal definitions of type mineral specimens (1988)
    Springer
    Mineralogy and petrology 38 (1988), S. 77-79 
    Details
    ISSN: 1438-1168
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01162483
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  • 8
    Electronic Resource
    Electronic Resource
    Schumacherit, ein neues Wismutmineral von Schneeberg in Sachsen (1983)
    Springer
    Mineralogy and petrology 31 (1983), S. 165-173 
    Details
    ISSN: 1438-1168
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Description / Table of Contents: Summary Schumacherite occurs in association with pucherite in crusts on quartz-bearing vein specimens from Schneeberg in Saxony. The mineral forms minute triclinic crystals which frequently are tabular parallel to (010). No cleavage, fracture conchoidal, hardness about 3,D x =6.90 g/cm3, colour yellow, luster more or less adamantine. Indices of refraction variable,n γ(max.)=2,42, biaxial with very large 2V, probably positive. Unit cell dimensions:a 0=10.05(3),b 0=7.46(3),c 0=6.90(3) Å, α=87.7(3)0, β=115.3(3)0, γ=111.5(3)0,Z=2, space group $$P\bar 1$$ . Strongest lines of the powder pattern: 4.57 (6) 110, $$\bar 201$$ ; 3.28 (10) $$\bar 221$$ , $$\bar 202$$ ; 3.19 (8) $$0\bar 21$$ , 111; 3.09 (8) 002, 210, $$2\bar 11$$ , $$\bar 112$$ ; 1.976 (5) $$3\bar 31$$ , $$0\bar 32$$ , $$\bar 512$$ , $$\bar 430$$ , $$\bar 4\bar 12$$ . Analysis: Bi2O3 79.0, V2O5 10.9, As2O5 5.8, P2O5 3.6, H2O 1.0% (calc.), sum 100.3%. This yields the formula Bi3.03(V1.07As0.45P0.45)1.97H1.00O9.97 or idealized Bi3O(OH)(VO4)2. Schumacherite is the vanadium analogue of preisingerite. When heated to higher temperatures the mineral is subject to a structural transformation which is evidenced by a marked change in the powder pattern.
    Notes: Zusammenfassung Schumacherit kommt in Vergesellschaftung mit Pucherit krustenförmig auf quarzreichen Gangstufen von Schneeberg in Sachsen vor. Das Mineral bildet kleine, zum Teil nach (010) tafelige Kristalle von trikliner Symmetrie. Keine Spaltbarkeit, Bruch muschelig, Härte ca. 3,D x =6,90 g/cm3, Farbe gelb, Glanz mehr oder minder diamantartig; Brechungsindizes variabel,n γ(max.)=2,42, zweiachsig mit sehr großem 2V, wahrscheinlich positiv. Gitterkonstanten:a 0=10,05(3),b 0=7,46(3),c 0=6,90(3) Å, α=87,7(3)0, β=115,3(3)0, γ=111,5(3)0,Z=2, Raumgruppe $$P\bar 1$$ . Stärkste Linien des Pulverdiagramms: 4,57 (6) 110, $$\bar 201$$ ; 3,28 (10) $$\bar 221$$ , $$\bar 202$$ ; 3,19 (8) $$0\bar 21$$ , 111; 3,09 (8) 002, 210, $$2\bar 11$$ , $$\bar 112$$ ; 1,976 (5) $$3\bar 31$$ , $$0\bar 32$$ , $$\bar 512$$ , $$\bar 430$$ , $$\bar 4\bar 12$$ . Analysenergebnis: Bi2O3 79,0, V2O5 10,9, As2O5 5,8, P2O5 3,6, H2O 1,0% (ber.), Summe 100,3%. Dies führt zur Formel Bi3,03(V1,07As0,45P0,45)1,97H1,00O9,97 oder idealisiert Bi3O(OH) (VO4)2. Schumacherit ist das dem Preisingerit entsprechende Vanadatmineral. Beim Erhitzen auf höhere Temperaturen kommt es zu einem Umwandlungsvorgang, der sich in einer stärkeren Veränderung des Pulverdiagramms äußert.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01084768
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  • 9
    Electronic Resource
    Electronic Resource
    Protocols for scientists on the deposition of investigated mineral specimens (1988)
    Springer
    Mineralogy and petrology 38 (1988), S. 299-300 
    Details
    ISSN: 1438-1168
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01167096
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  • 10
    Electronic Resource
    Electronic Resource
    Lammerit, Cu3[AsO4]2, ein neues Mineral von Laurani, Bolivien (1981)
    Springer
    Mineralogy and petrology 28 (1981), S. 157-164 
    Details
    ISSN: 1438-1168
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Description / Table of Contents: Summary Electron microprobe analysis of the new mineral lammerite gave CuO 49.9, ZnO 0.8, MgO 0.2, FeO 0.2, and As2 O5 49.8, total 100.9%. From this result, the ideal formula is given as Cu3[AsO4]2. Lammerite crystallizes monoclinic. The possible space groups areP21 orP21/m. The unit cell dimensions are:a=5.080(2),b=11.616(6),c=5.391(2) Å, β=111.71(3)°,Z=2. The strongest lines on the X-ray powder diffraction pattern are: 4.06(5) ( $$11\bar 1$$ , 3.80(6) (021), 3.06(8) (031), 3.00(8) (130), 2.89(10) (040, $$13\bar 1$$ ), 2.84(7) (111), 2.62(8) (121), 2.59(8) ( $$11\bar 2$$ ), 2.52(9) ( $$20\bar 1$$ , 041), 2.09(5) (150), and 1.582(6) ( $$25\bar 2$$ , 241). Lammerite is dark green transparent. The crystals are tabular on {100} and intergrown as radiated aggregates. Cleavage is {010} perfect, {100} good and {001} traces. The mineral is optically biaxial positive, 2V∼54±5°. The refractive indices are:n α≲1.89,n β=1.90, andn γ=1.95. Pleochroism strong and axial coloursX=very pale blue,Y=sky blue, andZ=pale bluish green. The extinction isn α‖b and on (010)n γ⋏c∼40°.H (Mohs)∼3.5–4.D=5.18 andD X =2.26 g·cm−3. Lammerite is associated with olivenite and an other proposed new mineral. The type material has been found at Veta Negra, Laurani, Bolivia.
    Notes: Zusammenfassung Die chemische Analyse des neuenMMinerals Lammerit mit der Elektronenmikrosonde ergab: CuO 49,9, ZnO 0,8, MgO 0,2, FeO 0,2 und As2O5 49,8, Summe 100,9%. Aus diesem Ergebnis wurde die idealisierte Formel Cu3[AsO4]2 abgeleitet. Lammerit kristallisiert monoklin. Die möglichen Raumgruppen sindP21 oderP21/m. Die Gitterkonstanten sind:a=5,080(2),b=11,616(6),c=5,391(2) Å, β=111,71(3)°,Z=2. Die stärksten Linien des Pulverdiagramms sind: 4,06(5) ( $$11\bar 1$$ ), 3,80(6) (021), 3,06(8) (031), 3,00(8) (130), 2,89(10) (040, $$13\bar 1$$ ), 2,84(7) (111), 2,62(8) (121), 2.59(8) ( $$11\bar 2$$ ), 2,52(9) ( $$20\bar 1$$ , 041), 2,09(5) (150) und 1,582(6) ( $$25\bar 2$$ , 241). Lammerit ist dunkelgrün durchscheinend. Die Kristalle sind tafelig nach {100} und zu radialstrahligen Aggregaten verwachsen. Die Spaltbarkeit nach {010} ist ausgezeichnet, nach {100} gut und nach {001} angedeutet. Das Mineral ist optisch zweiachsig positiv, 2V∼54±5°. Die Werte der Lichtbrechung sind:n α≲1,89,n β=1,90 undn γ=1,95. Lammerit ist stark pleochroitisch mit den AchsenfarbenX=hellblau,Y=himmelblau undZ=bläulichgrün. Die Auslöschung istn α‖b und auf (010)n γ⋏c∼40°.H (Mohs)∼3,5–4.D=5,18 undD X =5,26 g·cm−3. Lammerit kommt gemeinsam mit Olivenit und einem weiteren vermutlich neuen Mineral vor. Der Fundort war Veta Negra. Laurani, Bolivien.
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    URL: http://dx.doi.org/10.1007/BF01081551
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