Eggonite (Kolbeckite, Sterrettite), ScPO4 · 2H2O

1982 ◽  
Vol 46 (341) ◽  
pp. 493-497 ◽  
Author(s):  
M. H. Hey ◽  
Charles Milton ◽  
Edward J. Dwornik
Keyword(s):  
Chemical Data ◽  
Optical Data ◽  
New Mineral ◽  
Aluminium Phosphate ◽  
Physical Data ◽  
History Of ◽  
Sulfur Springs ◽  
Physical And Chemical ◽  
New Occurrences

SynopsisThe curious history of the mineral eggonite is reviewed, and two new occurrences are described. The original specimens, for which Schrauf gave good morphological and optical data in 1879, with a tentative suggestion that it was a cadmium silicate, were fakes; the tiny crystals of the new mineral were glued on to hemimorphite specimens from Altenberg, Belgium. In 1929, Zimanyi edited and published observations by Krenner, who found the mineral on silver ores from Felsöbánya, Hungary, added to Schrauf's physical data, and identified it as an aluminium phosphate. It was not until 1959 that Mrose and Wappner showed that it is scandium phosphate, ScPO4 · 2H2O, and essentially identical with kolbeckite, described by Edelmann in 1926 as a phosphate and silicate of beryllium, aluminium, and calcium from Saxony, and with sterrettite, described by Larsen and Montgomery in 1940 as an aluminium phosphate from Fairfield, Utah.In 1980 the IMA Commission on New Minerals and Mineral Names, while accepting the identity of the three minerals and rejecting the name sterrettite, were almost equally divided over the names eggonite and kolbeckite, which are thus both acceptable; since eggonite has 47 years priority, we suggest that it should have preference.The available physical and chemical data on eggonite are summarized and added to, and two new occurrences, at Potash Sulfur Springs, Arkansas, and at Sakpur, Gujarat, India, are described.

Julgoldite, new data and occurrences; a second recording

1976 ◽  
Vol 40 (315) ◽  
pp. 761-763 ◽  
Author(s):  
A. Livingstone
Keyword(s):  
Iron Content ◽  
Chemical Data ◽  
High Iron Content ◽  
High Iron ◽  
Infra Red ◽  
Large Peak ◽  
Physical And Chemical ◽  
New Occurrences

SummaryTwo new occurrences, in quartz dolerite, are reported for julgoldite. Physical and chemical data is presented together with indexed powder data for fifty-five reflections, fifteen of them additional to those previously reported. The julgoldite infra-red spectrum possesses the same configuration as that of an epidote or clinozoisite but with large peak shifts due to the high iron content.

A history of Kaye and Laby

2006 ◽  
Vol 60 (1) ◽  
pp. 49-57
Author(s):  
Douglas Ambrose
Keyword(s):  
Twentieth Century ◽  
Cavendish Laboratory ◽  
Physical Data ◽  
History Of ◽  
Physical And Chemical ◽  
Young Researchers

Two young researchers at the Cavendish Laboratory in the early part of the twentieth century made a collection of physical data that was published and has been known for nearly 100 years not by its title but by their names, ‘Kaye and Laby’. A brief account of the careers of the authors is followed by discussion of the development of the Tables of physical and chemical constants .

Beraunite and Its Team: the History of Discovery of a New Mineral Eleonorite

Priroda ◽  
2018 ◽  
pp. 12-20
Author(s):  
R. Rastsvetaeva ◽  
◽  
S. Aksenov ◽  
Keyword(s):  
New Mineral ◽  
History Of

scholarly journals Origin of Life on Mars: Suitability and Opportunities

Life ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 539
Author(s):  
Benton C. Clark ◽  
Vera M. Kolb ◽  
Andrew Steele ◽  
Christopher H. House ◽  
Nina L. Lanza ◽  
...  
Keyword(s):  
Origin Of Life ◽  
Energy Sources ◽  
Early Earth ◽  
Sediment Samples ◽  
Life On Mars ◽  
Eventual Return ◽  
History Of ◽  
Early Mars ◽  
Chemical Conditions ◽  
Physical And Chemical

Although the habitability of early Mars is now well established, its suitability for conditions favorable to an independent origin of life (OoL) has been less certain. With continued exploration, evidence has mounted for a widespread diversity of physical and chemical conditions on Mars that mimic those variously hypothesized as settings in which life first arose on Earth. Mars has also provided water, energy sources, CHNOPS elements, critical catalytic transition metal elements, as well as B, Mg, Ca, Na and K, all of which are elements associated with life as we know it. With its highly favorable sulfur abundance and land/ocean ratio, early wet Mars remains a prime candidate for its own OoL, in many respects superior to Earth. The relatively well-preserved ancient surface of planet Mars helps inform the range of possible analogous conditions during the now-obliterated history of early Earth. Continued exploration of Mars also contributes to the understanding of the opportunities for settings enabling an OoL on exoplanets. Favoring geochemical sediment samples for eventual return to Earth will enhance assessments of the likelihood of a Martian OoL.

Russellite: a second occurrence

1970 ◽  
Vol 37 (290) ◽  
pp. 705-707 ◽  
Author(s):  
L. C. Hodge
Keyword(s):  
Powder Diffraction ◽  
Western Australia ◽  
Original Description ◽  
Chemical Data ◽  
Green Material ◽  
X Ray ◽  
Fine Grained ◽  
Physical And Chemical ◽  
Pale Green

SummaryRussellite Bi2O3. WO3 occurs in a small pegmatite near Poona, Western Australia. The fine-grained yellow to pale green material is an inseparable mixture of russellite, bismite, koechlinite, and bismutite. X-ray powder diffraction, physical, and chemical data agree in general with the original description of the mineral from Cornwall, England. The original analyses made on micro quantities are now supplemented by analyses on macro quantities.

scholarly journals Physical and chemical data of WS2 platelets and thickness-dependent photoresponses

Data in Brief ◽  
2018 ◽  
Vol 20 ◽  
pp. 1256-1262
Author(s):  
Thanh Tai Nguyen ◽  
Malkeshkumar Patel ◽  
Dong-Kyun Ban ◽  
Joondong Kim
Keyword(s):  
Chemical Data ◽  
Physical And Chemical

TRUE AND APPARENT METABOLIZABLE ENERGY VALUES FOR POULTRY OF CANADIAN WHEATS AND OATS MEASURED BY BIOASSAY AND PREDICTED FROM PHYSICAL AND CHEMICAL DATA

1977 ◽  
Vol 57 (2) ◽  
pp. 365-374 ◽  
Author(s):  
I. R. SIBBALD ◽  
K. PRICE
Keyword(s):  
Metabolizable Energy ◽  
Chemical Data ◽  
Accuracy And Precision ◽  
Apparent Metabolizable Energy ◽  
The Difference ◽  
Variation Explained ◽  
Predicted Values ◽  
Naked Oats ◽  
Physical And Chemical ◽  
Better Than

Thirty samples of wheat and 28 samples of oats were assayed for true and apparent metabolizable energy (TME, AME). Within grains, the difference TME−AME increased with decreasing AME values; there is evidence that this trend is associated with reduced voluntary consumption of AME assay diets containing low energy grains. The TME and AME data were compared with ME values predicted from physical and chemical data describing the grains. Previously published prediction equations were tested and new equations were derived. Comparisons between predicted and observed data suggested that both the TME and AME values of wheat were predicted with insufficient accuracy and precision for practical use. Similar comparisons using the oat data showed high correlations between observed and predicted values, although the predictions were no more accurate than for wheat; however, when data describing four samples of naked oats were removed, the correlations were reduced substantially. Comparisons involving data for the hulled oats indicated that most equations were able to predict AME better than TME. Multiple regression analysis was used to identify those combinations of variables best able to predict TME data. No combination of variables was best for both wheat and oats. The combinations of variables used in published equations performed quite well. With four variables, the percentage of the TME variation explained was as high as 52 for wheat, 82 for oats and 64 for hulled oats. Predictions based on air-dry data are associated with higher correlations than those based on dry matter data, but the air-dry predictions are the less useful in practice. The reason for this is discussed.

Geology and petrochemistry of lower Aphebian (2.4–2.0 Ga) alkaline plutonic and hypabyssal rocks in the East Arm of Great Slave Lake, Northwest Territories

1979 ◽  
Vol 16 (1) ◽  
pp. 60-72 ◽  
Author(s):  
J. P. N. Badham
Keyword(s):  
Northwest Territories ◽  
Field Data ◽  
Easter Island ◽  
Chemical Data ◽  
Lower Proterozoic ◽  
Great Slave Lake ◽  
Data Support ◽  
Igneous Complexes ◽  
Igneous Activity ◽  
History Of

Two alkaline igneous complexes and three lines of diatreme breccias were emplaced in the East Arm of Great Slave Lake during the lower Proterozoic. Field relationships suggest that those rocks are broadly cogenetic and were emplaced about 2.1 Ga ago.One of the intrusions, the Easter Island dyke, was rotated subsequent to emplacement such that both top and bottom are now exposed. Field and petrographic data are indicative of progressive differentiation along (i.e., up) the dyke and are substantiated by chemical data. The differentiation history of the early gabbros of the Blachford Lake complex is similar. Late differentiates of both complexes closely resemble the igneous matrices of the breccias and petrographic and chemical data support the proposal of cogenesis and contemporaneity.The field data show that there was a period of significant faulting and concomitant alkaline igneous activity in the East Arm area in the lower Proterozoic.

scholarly journals Soil Factors Related to the Severity of Clubroot in Rio de Janeiro, Brazil

Plant Disease ◽  
2017 ◽  
Vol 101 (8) ◽  
pp. 1345-1353 ◽  
Author(s):  
Aline da S. Bhering ◽  
Margarida G. F. do Carmo ◽  
Talita de S. Matos ◽  
Erica S. A. Lima ◽  
Nelson M. B. do Amaral Sobrinho
Keyword(s):  
Rio De Janeiro ◽  
Principal Component ◽  
Inoculum Potential ◽  
Family Farms ◽  
Tropical Regions ◽  
Soil Attributes ◽  
Brassica Spp ◽  
History Of ◽  
Chemical Conditions ◽  
Physical And Chemical

Soil pH and calcium levels are determining factors in the success or failure of managing clubroot during the cultivation of Brassica spp. The aim of the present study was to evaluate the influence of soil attributes in tropical regions on the development of roots and clubroot and the accumulation of biomass and nutrients in cauliflower. One hundred and fifty-one samples of soil and plants were collected from 16 family farms that have a history of more than 50 years of regular cauliflower cultivation in Nova Friburgo, Rio de Janeiro, Brazil. Chemical and physical analyses were performed on the soil samples, and the severity of clubroot and the accumulation of biomass and macronutrients in individual plants and plant tissues. Clustering and main principal component analyses were performed on the data. The disease occurred on all farms, but with different intensities. A direct relationship was observed for the soil attributes (acidity and exchangeable aluminum content in particular) with the percentage of roots with clubroot and with the accumulation of biomass and macronutrients in the different plant organs. To reduce losses from clubroot in weathered soils, practices should aim to reduce the pathogen’s inoculum potential and improve the physical and chemical conditions of the soil, which would favor root development of the plants.

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