Journal/NDM59 2025 eng — различия между версиями
Kronrod (обсуждение | вклад) |
Kronrod (обсуждение | вклад) (→Issue 1) |
||
| Строка 27: | Строка 27: | ||
{{NDM_article | {{NDM_article | ||
| Авторы = Pautov L.A., Shodibekov M.A., Makhmadsharif S. | | Авторы = Pautov L.A., Shodibekov M.A., Makhmadsharif S. | ||
| − | | Название = Discovery of tainiolite in the carbonatites of the Dunkeldyk massif, Eastern Pamirs, p. 5- | + | | Название = Discovery of tainiolite in the carbonatites of the Dunkeldyk massif, Eastern Pamirs, p. 5-12 |
| Аннотация = Taeniolite, KLiMg<sub>2</sub>Si<sub>4</sub>O<sub>10</sub>F<sub>2</sub>, was discovered in a strontium-rich carbonatites of the Cenozoic subvolcanic potassium alkaline complex of Dunkeldyk (37<sup>о</sup>46'50''N, 74<sup>o</sup>59'37''E), Eastern Pamir, Gorno-Badakhshan Autonomous Oblast, Tajikistan. Taeniolite occurs as light-brown lamellar grains up to 3 mm in diameter and up to 0.4 mm in thick in a rock, which consists of calcium strontianite (Sr<sub>0.54</sub>Ca<sub>0.46</sub>)CO<sub>3</sub>, fluorite, Sr-bearing calcite, strontianite, Sr-bearing fluorapatite, barite, amphibole group member, which close to magnesio-fluoro-arfvedsonite, aegirine, cancrinite group mineral, ankylite-(Ce) and pyrite. Taeniolite is optically biaxial (–), 2<i>V</i> = 5–10(2)<sup>o</sup>. Refractive indices of the mineral are: <i>n<sub>g</sub></i> = <i>n<sub>m</sub></i> = 1.547(2), <i>n<sub>p</sub></i>= 1.524(2). Taeniolite from the Dunkeldyk massif is characterized with lithium content close to theoretical and extreme fluorine amount. Chemical analysis by electron microprobe (7 points) and LA-ICP-MS for Li gave SiO<sub>2</sub> 58.98, TiO<sub>2</sub> 0.09, Al<sub>2</sub>O<sub>3</sub> 0.23, FeO 0.51, MnO 0.12, MgO 19.89, K<sub>2</sub>O 11.28, Na<sub>2</sub>O 0.38, Li<sub>2</sub>O 3.65, F 9.24, H<sub>2</sub>O 0.07, total 104.44; –O=F<sub>2</sub> –3.88; total 100.57 wt%. The empirical formula, based on 10 O apfu is: (K<sub>0.97</sub>Na<sub>0.05</sub>)<sub>1.02</sub>(Li<sub>0.97</sub>Mg<sub>0.03</sub>)<sub>1.00</sub>(Mg<sub>1.97</sub>Fe<sub>0.03</sub>Mn<sub>0.01</sub>)<sub>2.01</sub>(Si<sub>3.97</sub>Al<sub>0.02</sub>Ti<sub>0.01</sub>)<sub>4.00</sub>O<sub>10</sub>[F<sub>1.97</sub>(OH)<sub>0.03</sub>]<sub>2</sub>. The main absorption bands in the IR spectrum of taeniolite (cm<sup>–1</sup>): 1129, 967, 721, 497, 383. In the Raman spectrum, strong lines (cm<sup>–1</sup>): 184, 258, 295, 307, 334, 701, 956, 1146. X-ray powder pattern of taeniolite is given. Apparently, this is the first discovery of a lithium mineral in the Dunkeldyk carbonatites.<br> | | Аннотация = Taeniolite, KLiMg<sub>2</sub>Si<sub>4</sub>O<sub>10</sub>F<sub>2</sub>, was discovered in a strontium-rich carbonatites of the Cenozoic subvolcanic potassium alkaline complex of Dunkeldyk (37<sup>о</sup>46'50''N, 74<sup>o</sup>59'37''E), Eastern Pamir, Gorno-Badakhshan Autonomous Oblast, Tajikistan. Taeniolite occurs as light-brown lamellar grains up to 3 mm in diameter and up to 0.4 mm in thick in a rock, which consists of calcium strontianite (Sr<sub>0.54</sub>Ca<sub>0.46</sub>)CO<sub>3</sub>, fluorite, Sr-bearing calcite, strontianite, Sr-bearing fluorapatite, barite, amphibole group member, which close to magnesio-fluoro-arfvedsonite, aegirine, cancrinite group mineral, ankylite-(Ce) and pyrite. Taeniolite is optically biaxial (–), 2<i>V</i> = 5–10(2)<sup>o</sup>. Refractive indices of the mineral are: <i>n<sub>g</sub></i> = <i>n<sub>m</sub></i> = 1.547(2), <i>n<sub>p</sub></i>= 1.524(2). Taeniolite from the Dunkeldyk massif is characterized with lithium content close to theoretical and extreme fluorine amount. Chemical analysis by electron microprobe (7 points) and LA-ICP-MS for Li gave SiO<sub>2</sub> 58.98, TiO<sub>2</sub> 0.09, Al<sub>2</sub>O<sub>3</sub> 0.23, FeO 0.51, MnO 0.12, MgO 19.89, K<sub>2</sub>O 11.28, Na<sub>2</sub>O 0.38, Li<sub>2</sub>O 3.65, F 9.24, H<sub>2</sub>O 0.07, total 104.44; –O=F<sub>2</sub> –3.88; total 100.57 wt%. The empirical formula, based on 10 O apfu is: (K<sub>0.97</sub>Na<sub>0.05</sub>)<sub>1.02</sub>(Li<sub>0.97</sub>Mg<sub>0.03</sub>)<sub>1.00</sub>(Mg<sub>1.97</sub>Fe<sub>0.03</sub>Mn<sub>0.01</sub>)<sub>2.01</sub>(Si<sub>3.97</sub>Al<sub>0.02</sub>Ti<sub>0.01</sub>)<sub>4.00</sub>O<sub>10</sub>[F<sub>1.97</sub>(OH)<sub>0.03</sub>]<sub>2</sub>. The main absorption bands in the IR spectrum of taeniolite (cm<sup>–1</sup>): 1129, 967, 721, 497, 383. In the Raman spectrum, strong lines (cm<sup>–1</sup>): 184, 258, 295, 307, 334, 701, 956, 1146. X-ray powder pattern of taeniolite is given. Apparently, this is the first discovery of a lithium mineral in the Dunkeldyk carbonatites.<br> | ||
'''Keywords:''' minnesotaite, ferrohortonolite-fayalite plagiogranites, Castel Mountain, Mountain Crimean mesozoids. | '''Keywords:''' minnesotaite, ferrohortonolite-fayalite plagiogranites, Castel Mountain, Mountain Crimean mesozoids. | ||
| Файл = Pautov_et_al_1_2025-1.pdf | | Файл = Pautov_et_al_1_2025-1.pdf | ||
| + | | Приложения = | ||
| + | }} | ||
| + | {{NDM_article | ||
| + | | Авторы = Gritsenko Yu.D., Ogorodova L.P., Vigasina M.F., Dedushenko S.K., Ksenofontov D.A., Melchakova L.V. | ||
| + | | Название = Staurolite from staurolite-almandine-muscovite schists of the Patom Highland (Mamsko-Chuisky District, Irkutsk Region): a comprehensive physicochemical study, p. 13-24 | ||
| + | | Аннотация = The article presents the results of a comprehensive physicochemical study of staurolite from staurolite-almandine-muscovite schists of the Patom Highland of the Mama-Chuisky District (Irkutsk Region) using powder X-ray diffraction, electron probe microanalysis, IR, Raman and Mössbauer spectroscopy. The chemical formula of the mineral is (Fe<sup>2+</sup><sub>1.7</sub>Mg<sub>0.3</sub>)(Al<sub>8.9</sub>Mg<sub>0.1</sub>)(Si<sub>3.9</sub>Al<sub>0.1</sub>)O<sub>22.8</sub>(OH)<sub>1.2</sub>. The enthalpy of formation of the studied staurolite from the elements was determined for the first time using high-temperature melt solution calorimetry on a Calvet microcalorimeter (– 11998 ± 11 kJ/mol). The value of its standard entropy was estimated and the value of the Gibbs energy of formation was calculated: 489.8 ± 2.1 J/(mol K) and −11271 ± 11 kJ/mol, respectively. The thermodynamic constants for staurolite of the idealized composition Fe<sup>2+</sup><sub>2</sub>Al<sub>9</sub>Si<sub>4</sub>O<sub>23</sub>(OH) were calculated: Δ<sub>f</sub><i>H</i><sup>0</sup>(298.15 K) = − 11943 ± 12 kJ/mol, Δ<sub>f</sub><i>G</i><sup>0</sup>(298.15 K) = − 11222 ± 12 kJ/mol | ||
| + | .<br> | ||
| + | '''Keywords:''' staurolite, Mamsko-Chuisky district, Patom Highland, Calvet microcalorimetry, enthalpy of formation, entropy, Gibbs energy, IR spectroscopy, Raman spectroscopy, Mössbauer spectroscopy. | ||
| + | | Файл = Gritsenko_et_al_2_2025-1.pdf | ||
| Приложения = | | Приложения = | ||
}} | }} | ||
Версия 18:40, 19 июля 2025
New Data on Minerals, Volume 59, 2025
DEADLINES FOR ARTICLES
Issue 1 - March 31, 2025
Issue 2 - May 31, 2025
Issue 3 - August 31, 2025
Issue 4 - November 30, 2025
Editorial Board
Editor in Chief:
Plechov P.Yu. -D.Sc. in Geology and Mineralogy, Professor
Members of Editorial Board:
Pekov I.V. - Corresponding Member of the Russian Academy of Sciences
Garanin V.K. - D.Sc. in Geology and Mineralogy, Professor
Borutsky B.E. - D.Sc. in Geology and Mineralogy
Spiridonov B.E. - D.Sc. in Geology and Mineralogy
Chukanov N.V. - D.Sc. in Physical and Mathematical Sciences
Kamenetsky V.S. - Professor (University of Tasmania)
Nenasheva S.N. - PhD in Geology and Mineralogy
Matvienko E.N. - PhD in Geology and Mineralogy
Generalov M.E. - PhD in Geology and Mineralogy
Pautov L.A. - Senior Researcher
Layout Designer
Kronrod E.V. - PhD in Chemistry
Content
Issue 1
Pautov L.A., Shodibekov M.A., Makhmadsharif S.
Discovery of tainiolite in the carbonatites of the Dunkeldyk massif, Eastern Pamirs, p. 5-12
Taeniolite, KLiMg2Si4O10F2, was discovered in a strontium-rich carbonatites of the Cenozoic subvolcanic potassium alkaline complex of Dunkeldyk (37о46'50N, 74o59'37E), Eastern Pamir, Gorno-Badakhshan Autonomous Oblast, Tajikistan. Taeniolite occurs as light-brown lamellar grains up to 3 mm in diameter and up to 0.4 mm in thick in a rock, which consists of calcium strontianite (Sr0.54Ca0.46)CO3, fluorite, Sr-bearing calcite, strontianite, Sr-bearing fluorapatite, barite, amphibole group member, which close to magnesio-fluoro-arfvedsonite, aegirine, cancrinite group mineral, ankylite-(Ce) and pyrite. Taeniolite is optically biaxial (–), 2V = 5–10(2)o. Refractive indices of the mineral are: ng = nm = 1.547(2), np= 1.524(2). Taeniolite from the Dunkeldyk massif is characterized with lithium content close to theoretical and extreme fluorine amount. Chemical analysis by electron microprobe (7 points) and LA-ICP-MS for Li gave SiO2 58.98, TiO2 0.09, Al2O3 0.23, FeO 0.51, MnO 0.12, MgO 19.89, K2O 11.28, Na2O 0.38, Li2O 3.65, F 9.24, H2O 0.07, total 104.44; –O=F2 –3.88; total 100.57 wt%. The empirical formula, based on 10 O apfu is: (K0.97Na0.05)1.02(Li0.97Mg0.03)1.00(Mg1.97Fe0.03Mn0.01)2.01(Si3.97Al0.02Ti0.01)4.00O10[F1.97(OH)0.03]2. The main absorption bands in the IR spectrum of taeniolite (cm–1): 1129, 967, 721, 497, 383. In the Raman spectrum, strong lines (cm–1): 184, 258, 295, 307, 334, 701, 956, 1146. X-ray powder pattern of taeniolite is given. Apparently, this is the first discovery of a lithium mineral in the Dunkeldyk carbonatites.
Keywords: minnesotaite, ferrohortonolite-fayalite plagiogranites, Castel Mountain, Mountain Crimean mesozoids. читать далее...
Gritsenko Yu.D., Ogorodova L.P., Vigasina M.F., Dedushenko S.K., Ksenofontov D.A., Melchakova L.V.
Staurolite from staurolite-almandine-muscovite schists of the Patom Highland (Mamsko-Chuisky District, Irkutsk Region): a comprehensive physicochemical study, p. 13-24
The article presents the results of a comprehensive physicochemical study of staurolite from staurolite-almandine-muscovite schists of the Patom Highland of the Mama-Chuisky District (Irkutsk Region) using powder X-ray diffraction, electron probe microanalysis, IR, Raman and Mössbauer spectroscopy. The chemical formula of the mineral is (Fe2+1.7Mg0.3)(Al8.9Mg0.1)(Si3.9Al0.1)O22.8(OH)1.2. The enthalpy of formation of the studied staurolite from the elements was determined for the first time using high-temperature melt solution calorimetry on a Calvet microcalorimeter (– 11998 ± 11 kJ/mol). The value of its standard entropy was estimated and the value of the Gibbs energy of formation was calculated: 489.8 ± 2.1 J/(mol K) and −11271 ± 11 kJ/mol, respectively. The thermodynamic constants for staurolite of the idealized composition Fe2+2Al9Si4O23(OH) were calculated: ΔfH0(298.15 K) = − 11943 ± 12 kJ/mol, ΔfG0(298.15 K) = − 11222 ± 12 kJ/mol
.
Keywords: staurolite, Mamsko-Chuisky district, Patom Highland, Calvet microcalorimetry, enthalpy of formation, entropy, Gibbs energy, IR spectroscopy, Raman spectroscopy, Mössbauer spectroscopy. читать далее...
