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    Wyświetlanie 1-4 z 4
    Tytuł:
    Średni ciężar atomowy, średnia objętość i promień atomu chondrytu Creston (L5/6)
    Mean atomic weight, mean volume and radius of atom of Creston (L5/6) chondrite
    Autorzy:
    Szurgot, Marian
    Powiązania:
    https://bibliotekanauki.pl/articles/30146488.pdf
    Data publikacji:
    2024-04
    Wydawca:
    Polskie Towarzystwo Meteorytowe
    Tematy:
    Creston chondrite
    Ensisheim chondrite
    Jezersko chondrite
    mean atomic weight
    mean volume of atom
    mean radius of atom
    Opis:
    Mean atomic weight Amean, mean volume and mean radius of atom of Creston ordinary chondrite (L5/6 S4 W0) felt in 2015 in Creston near Paso Robles, California has been calculated using literature data on chemical composition of the meteorite (Jenniskens et al. 2019). The aim of the studies was to determine Amean, Vatom, and Ratom values for this new meteorite, and compare the data with the values obtained for two other ordinary chondrites: Ensisheim (LL6), and Jezersko (H4). Calculations were conducted for the whole rock, for silicates, and for Fe, Ni metal of Creston, and Ensisheim chondrites. It was shown that the mean atomic weight of the whole rock of Creston chondrite Amean = 24.06. Creston’s silicates revealed the value: Ameansi = 21.92, and Creston’s Fe,Ni metal: Ameanmet = 56.25. It was calculated that the average volume of the Creston’s atom Vatom = 1.111·10–29 m3 (sample CR05), and 1.115·10–29 m3 (sample CR06). Average radius of Creston’s atom: Ratom = 138.5 pm, mean radius of atom of Creston silicates: Ratomsi = 138 pm, and mean radius of atom of Creston metal: Ratommet = 142 pm.
    Źródło:
    Acta Societatis Metheoriticae Polonorum; 2024, 15; 116-128
    2080-5497
    Pojawia się w:
    Acta Societatis Metheoriticae Polonorum
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Średni ciężar cząsteczkowy chondrytu Jezersko (H4). Promień i objętość atomu i cząsteczki chondrytu
    Average molecular weight of Jezersko H4 chondrite. Radius and volume of atom and molecule of chondrite
    Autorzy:
    Szurgot, Marian
    Powiązania:
    https://bibliotekanauki.pl/articles/1033154.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Meteorytowe
    Tematy:
    Jezersko chondrite
    average molecular weight
    average radius of atom
    average radius of molecule
    Opis:
    Average molecular weight and average atomic number of molecule of Jezersko ordinary chondrite (H4 S2(3) W2, find in 1992 in Slovenia) have been calculated using literature data on chemical composition of the meteorite (Miler et al. 2014). It was shown that Jezersko’s = 55.58, = 27.21, and ratio / = 2.043 for composition without water. Jezersko’s silicates shown the values: = 54.08, = 21.77, and / = 2.484. Volume and radius of average Jezersko molecule, and of atom have been also determined. It was calculated that the average volume of Jezersko’s molecule Vmol = 2.515·10–29 m3, and average radius of Jezersko’s molecule Rmol = 181.5 pm. Average volume of the Jezersko’s atom Vatom = 1.117·10–29 m3, and average radius of Jezersko’s atom: Ratom = 138.5 pm. Ratio of average Jezersko’s volume of molecule to atom volume: 2.25, and ratio of radius of molecule to radius of atom: 1.31. Number of atoms in Jezersko meteorite average molecule Nmol = /Amean = /Zmean = 2.25, and for Jezersko’s silicates Nsimol = 2.48.
    Źródło:
    Acta Societatis Metheoriticae Polonorum; 2020, 11; 98-109
    2080-5497
    Pojawia się w:
    Acta Societatis Metheoriticae Polonorum
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ciepło właściwe i ciepło atomowe chondrytu Jezersko
    Specific heat and atomic heat of the Jezersko chondrite
    Autorzy:
    Szurgot, Marian A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2076001.pdf
    Data publikacji:
    2020
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    chondryt Jezersko
    zwykłe chondryty
    ciepło właściwe
    ciepło atomowe
    Jezersko chondrite
    ordinary chondrites
    specific heat
    atomic heat
    Opis:
    Specific heat capacity of the Jezersko chondrite (H4, S2/3, W2) was predicted by a relationship between bulk density and heat capacity of meteorites Cp(dbulk). It was calculated that Cp(dbulk) is equal to 703±15 J/(kgK) at 300 K, and 529±15 J/(kgK) at 200 K. Its volumetric heat capacity is equal to 1.8±0.1 MJ/(m3K) at 200 K, and 2.3±0.1 MJ/(m3K) at 300 K, which is close to the room temperature value characteristic of stony meteorites (2.5 MJ/(m3K). The atomic heat of the Jezersko meteorite is 13.1±0.4J/(molK) at 200K and 17.4±0.4 J/(molK) at 300K. It was shown that mean atomic weight enables predicting room temperature values of specific heat capacity of ordinary chondrites, and the common mean atomic heat of ordinary chondrites is equal to 17.5±0.6 J/(molK) at 300 K.
    Źródło:
    Przegląd Geologiczny; 2020, 68, 1; 54--59
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Średni ciężar atomowy i gęstość ziaren chondrytu Jezersko (H4)
    Mean atomic weight and grain density of Jezersko H4 chondrite
    Autorzy:
    Szurgot, Marian
    Powiązania:
    https://bibliotekanauki.pl/articles/1033134.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Meteorytowe
    Tematy:
    H chondrites
    Jezersko chondrite
    grain density
    iron to silicon ratio
    mean atomic number
    mean atomic weight
    ordinary chondrites
    weathering effects
    Opis:
    Mean atomic weight Amean of Jezersko (H4 S2(3) W2, find in 1992 in Slovenia) ordinary chondrite has been calculated using literature data on chemical composition of the meteorite (Miler et al. 2014) and using relationship between mean atomic weight and Fe/Si atomic ratio (Szurgot 2015c, d, e). It was shown that Jezersko’s Amean = 24.68, for composition without water. This value is close to the mean atomic weight of H chondrite finds (Amean = 24.80), and is somewhat smaller than Amean values for H4 chondrite falls (Amean = 25.09), and for H chondrite falls (Amean = 25.05) (Szurgot 2015e). Jezersko’s Fe/Si atomic ratio (0.742) leads to Amean = 24.66±0.24, which is close to the value determined by bulk composition. Jezersko’s Fe/Si atomic ratio is close to the value for H’s mean Fe/Si ratio: 0.762 for finds, and 0.807 for falls (Szurgot 2016a). This confirms that Jezersko belongs to H chondrites, as previously classified (Miler et al. 2014). Mean atomic number Zmean, and Amean/Zmean ratio of the meteorite have been also calculated. Jezersko’s Zmean = 12.16, and Amean/Zmean ratio is: 2.029 for composition without water. Jezersko’s silicates shown the values: Amean = 21.77, Zmean = 10.78, Amean/Z mean = 2.019, Fe/Si = 0.272, Amean(Fe/Si) = 21.84±0.06, and Jezersko’s Fe,Ni metal values: Amean = 56.12, Zmean = 26.19, and Amean/Z mean = 2.143. Two dependences: i) grain density dgr on Amean (Szurgot 2015a), and ii) grain density dgrain on Fe/Si atomic ratio (Szurgot 2017g), were used to predict grain density of Jezersko chondrite. It was established that dgr(Amean) leads to the values: 3.65±0.07 g/cm3 for Jezersko chondrite, 3.27±0.07 g/cm3 for silicates, and 7.83±0.07 g/cm3 for Fe,Ni metal of Jezersko meteorite. Dependence dgr(Fe/Si) predicts somewhat higher value grain density for Jezersko chondrite: 3.68±0.07 g/cm3, and 3.32±0.07 g/cm3 for silicates. All the predictions lead to the mean value of grain density for its weathering W2 degree: 3.67±0.03 g/cm3 for the whole rock of meteorite, and 3.29±0.03 g/cm3 for the silicates. It was established that due to terrestrial weathering, resulting in W2 weathering stage, Amean value of Jezersko chondrite is about 0.45 lower, Fe/Si atomic ratio is about 0.075 lower, and dgrain is about 0.06 g/cm3 lower than values for unweathered (W0) meteorite. Predicted porosity for Jezersko chondrite is: 10,1±0,7% for W2, and 11,5±0,5% for W0.
    Źródło:
    Acta Societatis Metheoriticae Polonorum; 2019, 10; 140-159
    2080-5497
    Pojawia się w:
    Acta Societatis Metheoriticae Polonorum
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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