Partially-ordered mixed-layer mica-montmorillonite from Maitland, New South Wales

Clay Minerals ◽  
1967 ◽  
Vol 7 (1) ◽  
pp. 63-78 ◽  
Author(s):  
J. D. Hamilton
Keyword(s):  
Mixed Layer ◽  
New South ◽  
New South Wales ◽  
Structural Formula ◽  
X Ray Diffraction ◽  
Fourier Synthesis ◽  
Electron Microscopic ◽  
X Ray ◽  
Layer Sequence ◽  
South Wales

AbstractA mixed-layer clay mineral from a Permian sandstone at Maitland, New South Wales has been identified as 2:1 mica-montmorillonite structure with ‘imperfectly regular’ interstratification. The results from Fourier transform analysis and Fourier synthesis of 00l X-ray diffraction data have not fully elucidated the interlayering patterns but have indicated that there is complete alteration in the stacking and that the 1:1 (allevardite type) layer sequence relationship is strongly developed.X-ray diffraction, differential thermal, thermogravimetric, chemical, cation exchange and electron microscopic data for the mineral are given. The chemical analysis for the Na+-saturated material gives the structural formulaK0.90 Ca0.06 Na0.49 [Al3.52, Fe0.183+ Mg0.27 Ti0.03 (Al1.24 Si6.76) O20 (OH)4] H2OIt is considered that most of the fixed K+ and Ca++ ions are probably held in the mica interlayers, while the exchangeable components are largely accommodated in the expanded montmorillonite zones.

Beidellitic montmorillonite from Swansea, New South Wales

Clay Minerals ◽  
1971 ◽  
Vol 9 (1) ◽  
pp. 107-123 ◽  
Author(s):  
J. D. Hamilton
Keyword(s):  
Coal Seam ◽  
Infrared Absorption ◽  
New South ◽  
New South Wales ◽  
Structural Formula ◽  
X Ray ◽  
South Wales ◽  
Heat Treated ◽  
Saturated Form ◽  
Image Position

AbstractThe minus 1μm fraction of an argillized vitric tuff, overlying the Wallarah Coal Seam near Swansea, N.S.W. is a nearly monomineralic (95%+) expandite clay, which hydrates and reacts to glycerol and heat treatments like montmorillonite. Results of X-ray, differential thermal, thermogravimetric and infrared absorption analyses confirm the general montmorillonoid character of the mineral, but chemical data indicate that much of its structure charge arises from substitutions in the tetrahedral zones of the lattice, as in beidellite rather than montmorillonite. The structural fOrmula deduced for the Ca++-saturated form of the minus 0.1μm clay is:The distinctive behaviours of the heat-treated NH4+- and Li+-saturated structures also suggest that the mineral is a 'beidellitic montmorillonite' rather than a montmorillonite.

A lithium-bearing aluminian regular mixed layer montmorillonite-chlorite from Huy, Belgium

Clay Minerals ◽  
1974 ◽  
Vol 10 (3) ◽  
pp. 135-144 ◽  
Author(s):  
G. Brown ◽  
P. Bourguignon ◽  
J. Thorez
Keyword(s):  
Mixed Layer ◽  
Cation Exchange Capacity ◽  
Structural Formula ◽  
Exchange Capacity ◽  
X Ray Diffraction ◽  
X Ray ◽  
Saturated Clay ◽  
Bluish Green ◽  
Image Position ◽  
Green Clay

AbstractA bluish-green clay found in veins cutting across brecciated slates of the Llanvirnian stage at Huy, Belgium, is shown by X-ray diffraction and chemical analysis to be a lithium-bearing, aluminium-rich, regular mixed layer montmorillonite-chlorite with associated pyrophyllite, nacrite and quartz and smaller amounts of calcite and ankerite. The cation exchange capacity of the purified air-dry magnesium saturated clay is 49 mEq/100 g and its structural formula isThe problem of the nomenclature of regular mixed layer montmorillonite-chlorites is discussed.

Barringtonite—A new hydrous magnesium carbonate from Barrington Tops, New South Wales, Australia

1965 ◽  
Vol 34 (268) ◽  
pp. 370-372 ◽  
Author(s):  
Bebyl Nashar
Keyword(s):  
New South ◽  
Olivine Basalt ◽  
New South Wales ◽  
Magnesium Carbonate ◽  
Refractive Indices ◽  
X Ray ◽  
South Wales ◽  
Cell Dimensions

SummaryBarringtonite, a new hydrous magnesium carbonate of composition MgCO3,2H2O, is recorded from Sempill Creek, Barrington Tops, New South Wales, where it occurs as nodular encrustations on the surface of olivine basalt. The mineral is triclinic, biaxial positive, has refractive indices α = 1·458, β = 1·473, γ = 1·501, 2Vγ = 73° 44′, and using Ito's method (1949) cell dimensions α = 9·155 Å, b = 6·202 Å, c = 6·092Å, α = 94· 00′, β = 95· 32′, and γ = 108° 72′. The three strongest lines on an X-ray powder photograph give d values of 8·682, 3·093, and 2·936 Å.

Significance of clinopyroxene compositions from the Cudgegong Volcanics and Toolamanang Volcanics: Cudgegong-Mudgee district, NSW, Australia

1985 ◽  
Vol 49 (353) ◽  
pp. 591-599 ◽  
Author(s):  
J. W. Pemberton ◽  
R. Offler
Keyword(s):  
New South ◽  
New South Wales ◽  
Structural Formula ◽  
Primary Phase ◽  
Late Ordovician ◽  
Parent Magma ◽  
Calc Alkaline ◽  
South Wales ◽  
Stratigraphic Position ◽  
Altered Basalt

SynopisClinopyroxene phenocrysts and groundmass crystals are relict phases in altered basalt and basaltic andesite lavas, and arenites of the Cudgegong Volcanics and Toolamanang Volcanics, Cudgegong-Mudgee district, New South Wales. Petrography, field relationships and clinopyroxene compositions indicate that basaltic blocks in the latter unit are reworked from the Cudgegong Volcanics. Clinopyroxene phenocrysts show a restricted compositional range and minor Feenrichment from core to rim, features considered indicative of a calc-alkaline parent magma. It is proposed that the Cudgegong Volcanics crystallized under hydrous conditions, at least in the later stages, with rising fO2 resulting in a Fe-Ti oxide crystallizing as a primary phase. The clinopyroxenes are considered to have crystallized at moderate (5–6 kbar) and falling pressures and at minimum temperatures in the range 900 to 1000°C. Coupled substitutions affecting the “other” components in the clinopyroxene structural formula indicate that the ivAl-viFe3+, ivAl-viAl and ivAl-viTi4+ couples are important. The Sofala Volcanics, south of the study area, and the Cudgegong Volcanics are similar in age, petrography and stratigraphic position, and contain relict clinopyroxenes which are chemically similar. This suggests that the units are laterally equivalent and adds further evidence to the proposal that an oceanic island arc system was active in central western New South Wales during the Late Ordovician.

Zinc-manganese carbonates from Broken Hill, New South Wales

1986 ◽  
Vol 50 (355) ◽  
pp. 49-53 ◽  
Author(s):  
W. D. Birch
Keyword(s):  
New South ◽  
New South Wales ◽  
Natural Occurrence ◽  
Solid Solution Series ◽  
Near Surface ◽  
X Ray ◽  
Broken Hill ◽  
South Wales ◽  
Uniform Composition ◽  
Locality Information

AbstractSpecimens of honey-brown to pinkish-brown globular carbonates encrusting concretionary goethite–coronadite from the oxidized zone at Broken Hill, New South Wales, have compositions in the rhodochrosite–smithsonite series. This may be the first extensive natural occurrence of this solid-solution series. Growth of the carbonates occurred in zones which have near uniform composition. The ratio MnCO3/(MnCO3 + ZnCO3) for each zone bears a linear relationship to the measured d spacing for the 104 X-ray reflections. Because cerussite is the only other mineral associated with the Zn-Mn carbonates and because of an absence of detailed locality information, the paragenetic significance of these minerals cannot be determined. The solutions depositing them may have been derived from the near-surface equivalents of the Zinc Lode horizons.

The mineralogy of metamorphosed basic rocks from the Willyama Complex, Broken Hill district, New South Wales. Part II. Pyroxenes, garnets, plagioclases, and opaque oxides

1965 ◽  
Vol 35 (272) ◽  
pp. 561-587 ◽  
Author(s):  
R. A. Binns
Keyword(s):  
New South ◽  
Granulite Facies ◽  
Optical Data ◽  
Chemical Compositions ◽  
X Ray Diffraction ◽  
X Ray ◽  
Broken Hill ◽  
South Wales ◽  
Hill District ◽  
Basic Rocks

SummaryChemical and optical data are presented for the orthopyroxenes, clinopyroxenes, garnets, plagioclases, and opaque oxides in high-grade regionally metamorphosed basic rocks and their garnetiferous associates from the Willyama Complex. Exsolution phenomena in the pyroxenes have been studied by X-ray diffraction methods and with the electron probe micro-analyser. The (001) lamellae in one lime-rich clinopyroxene are clinohypersthene. Comparison of the Willyama and other granulite facies clinopyroxenes with those of slowly cooled basic igneous rocks suggests that their chemical compositions may be used as guides to temperature conditions during formation. Willyama plagioclases are complexly twinned and possess intermediate structural states.

Sandy beach meiofauna of eastern Australia (southern Queensland and New South Wales). II. Luriculus australiensis, gen. et. sp. nov. (Luridae : Dalyelliida : Platyhelminthes)

1994 ◽  
Vol 8 (4) ◽  
pp. 1009 ◽  
Author(s):  
A Faubel ◽  
K Rohde ◽  
NA Watson
Keyword(s):  
New Genus ◽  
Sandy Beach ◽  
New South ◽  
New South Wales ◽  
Electron Microscopic ◽  
South Wales ◽  
Eastern Australia ◽  
Microscopic Investigations

Luriculus australiensis, gen. et sp, nov., from a sandy, exposed ocean beach at Arrawarra Headland, north of Coffs Harbour, NSW, Australia, is described on the basis of light and electron microscopic investigations. The establishment of the new genus Luriculus is based on the presence of germovitellaria, rather than discrete organs. Lurus castor Sterrer & Rieger, 1990, Lurus tyndareus Sterrer & Rieger, 1990, and Lurus minos Sterrer, 1992, are transferred to this genus.

High-iron bustamite and fluorapatite from the Broken Hill mine, New South Wales, Australia

1974 ◽  
Vol 39 (305) ◽  
pp. 601-604 ◽  
Author(s):  
K. Harada ◽  
H. Sekino ◽  
K. Nagashima ◽  
T. Watanabe ◽  
H. Momoi
Keyword(s):  
New South ◽  
Close Association ◽  
New South Wales ◽  
Chemical Analyses ◽  
X Ray ◽  
High Iron ◽  
Broken Hill ◽  
South Wales

SummaryHigh-iron bustamite and apatite occur as subhedral large crystals up to 1 to 2 cm wide and 10 cm long in close association with spessartine in the disseminated sphalerite- and galena-bearing diopside-roepperite-calcite skarn at the New Broken Hill Consolidated mine (N.B.H.S.), New South Wales, Australia. Complete chemical analyses of the minerals have been made, together with physical, optical, and X-ray studies.

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