Dan Topa
YOU?
Author Swipe
View article: CSD 2264833: Experimental Crystal Structure Determination
CSD 2264833: Experimental Crystal Structure Determination Open
An entry from the Inorganic Crystal Structure Database, the world’s repository for inorganic crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely availabl…
View article: A fresh view on the structure and twinning of owyheeite, a rod-polytype and twofold superstructure
A fresh view on the structure and twinning of owyheeite, a rod-polytype and twofold superstructure Open
Owyheeite [Cu 0.09 (1) Ag 2.77 (4) Pb 10.23 (4) Sb 10.89 (5) S 28.00 (5) ] crystallizes as a twofold superstructure with P 2 1 / n symmetry and pseudo-orthorhombic metrics [ a = 8.1882 (3) Å, b = 27.2641 (7) Å, c = 22.8679 (7) Å, β = 90.29…
View article: Prachařite, CaSb5+2(As3+2O5)2O2·10H2O, a new mineral from Lavrion, Greece
Prachařite, CaSb5+2(As3+2O5)2O2·10H2O, a new mineral from Lavrion, Greece Open
Prachařite, ideally CaSb 5+ 2 (As 3+ 2 O 5 ) 2 O 2 ·10H 2 O, is a new mineral found in underground workings of the Plaka Mine No. 80, Plaka, Lavrion Mining District, Attica, Greece. It occurs as colourless to white, thin tabular hexagonal,…
View article: Neutron capture <sup>128</sup>Xe and <sup>129</sup>Xe in the San Juan mass of the Campo del Cielo IAB iron meteorite: Evidence for a high fluence of thermalized neutrons
Neutron capture <sup>128</sup>Xe and <sup>129</sup>Xe in the San Juan mass of the Campo del Cielo IAB iron meteorite: Evidence for a high fluence of thermalized neutrons Open
The petrographic study of the San Juan A2 polished section demonstrated textural and compositional similarities with the Campo del Cielo IAB iron meteorite, with trace element abundances in metal following the pattern of bulk Campo del Cie…
View article: The parisite–(Ce) enigma: challenges in the identification of fluorcarbonate minerals
The parisite–(Ce) enigma: challenges in the identification of fluorcarbonate minerals Open
A multi-methodological study was conducted in order to provide further insight into the structural and compositional complexity of rare earth element (REE) fluorcarbonates, with particular attention to their correct assignment to a mineral…
View article: The history of the Tissint meteorite, from its crystallization on Mars to its exposure in space: New geochemical, isotopic, and cosmogenic nuclide data
The history of the Tissint meteorite, from its crystallization on Mars to its exposure in space: New geochemical, isotopic, and cosmogenic nuclide data Open
The Tissint meteorite fell on July 18, 2011 in Morocco and was quickly recovered, allowing the investigation of a new unaltered sample from Mars. We report new high‐field strength and highly siderophile element (HSE) data, Sr‐Nd‐Hf‐W‐Os is…
View article: Sr-bearing high-pressure tourmaline from the Kreuzeck Mountains, Eastern Alps, Austria
Sr-bearing high-pressure tourmaline from the Kreuzeck Mountains, Eastern Alps, Austria Open
A detailed investigation was conducted on high-pressure (~1.4 GPa) tourmaline from an Eoalpine mafic eclogite, which occurs in the Kreuzeck Mountains, Eastern Alps, Austria. Tourmaline from this locality contains the highest amount of Sr²⁺…
View article: The Crystal Chemistry of Rathite Based on New Electron-Microprobe Data and Single-Crystal Structure Refinements: The Role of Thallium
The Crystal Chemistry of Rathite Based on New Electron-Microprobe Data and Single-Crystal Structure Refinements: The Role of Thallium Open
Crystal-structure refinements in space group P21/c were performed on five grains of rathite with different types and degrees of thallium, silver, and antimony substitutions, as well as quantitative electron-microprobe analyses of more than…
View article: Polloneite, a new complex Pb(-Ag)-As-Sb sulfosalt from the Pollone mine, Apuan Alps, Tuscany, Italy
Polloneite, a new complex Pb(-Ag)-As-Sb sulfosalt from the Pollone mine, Apuan Alps, Tuscany, Italy Open
Polloneite, ideally AgPb 46 As 26 Sb 23 S 120 , is a new N = 4 member of the sartorite homologous series. It occurs in a matrix of baryte from the Pizzone level of the Pollone baryte-pyrite-(Pb-Zn-Ag) deposit at Valdicastello Carducci, nea…
View article: Oscarkempffite, Ag<sub>10</sub>Pb<sub>4</sub>(Sb<sub>17</sub>Bi<sub>9</sub>)<sub>∑</sub><sub>26</sub>S<sub>48</sub>, a new Sb-Bi member of the lillianite homologous series
Oscarkempffite, Ag<sub>10</sub>Pb<sub>4</sub>(Sb<sub>17</sub>Bi<sub>9</sub>)<sub>∑</sub><sub>26</sub>S<sub>48</sub>, a new Sb-Bi member of the lillianite homologous series Open
Oscarkempffite, ideally Ag 10 Pb 4 (Sb 17 Bi 9 ) ∑=26 S 48 , is a new mineral species found in old material (1929–30) from the Colorada vein, Animas mine, Chocaya Province, Department of Potosi, Bolivia. It is associated with aramayoite, s…
View article: Plagioclase hosted Fe-Ti-oxide micro-inclusions in an oceanic gabbro-plagiogranite association from the Mid Atlantic ridge at 13 34' N
Plagioclase hosted Fe-Ti-oxide micro-inclusions in an oceanic gabbro-plagiogranite association from the Mid Atlantic ridge at 13 34' N Open
Shape and lattice orientation relations as well as chemical compositions of Fe-Ti-oxide micro-inclusions and plagioclase host crystals in rocks of a gabbro-plagiogranite assemblage from the Mid-Atlantic ridge at 13°349 N were studied using…
View article: How much copper can the pearceite structure sustain? The case of cupropearceite from Tsumeb, Namibia
How much copper can the pearceite structure sustain? The case of cupropearceite from Tsumeb, Namibia Open
The intriguing recovery of an extremely Cu-rich cupropearceite crystal (Cu = 7.62 a.p.f.u.) from Tsumeb, Namibia, allowed us to study the effect of the entry of Cu in the positions usually occupied by Ag in the B module layer in the stru…
View article: Cosmogenic radionuclides and mineralogical properties of the Chelyabinsk (LL5) meteorite: What do we learn about the meteoroid?
Cosmogenic radionuclides and mineralogical properties of the Chelyabinsk (LL5) meteorite: What do we learn about the meteoroid? Open
On February 15, 2013, after the observation of a brilliant fireball and a spectacular airburst over the southern Ural region (Russia), thousands of stones fell and were rapidly recovered, bringing some extremely fresh material for scientif…