Apatite is a group of phosphate minerals, usually hydroxyapatite, fluorapatite and chlorapatite, with high concentrations of OH−, F− and Cl− ion, respectively, in the crystal. The formula of the admixture of the three most common endmembers is written as Ca10(PO4)6(OH,F,Cl)2, and the crystal unit cell formulae of the individual minerals are written as Ca10(PO4)6(OH)2, Ca10(PO4)6F2 and Ca10(PO4)6Cl2.
Victor Moritz Goldschmidt was a Norwegian mineralogist considered to be the founder of modern geochemistry and crystal chemistry, developer of the Goldschmidt Classification of elements.
Paul Werner Gast was an American geochemist and geologist.
The impact of nanotechnology extends from its medical, ethical, mental, legal and environmental applications, to fields such as engineering, biology, chemistry, computing, materials science, and communications.
Nanogeoscience is the study of nanoscale phenomena related to geological systems. Predominantly, this is investigated by studying environmental nanoparticles between 1–100 nanometers in size. Other applicable fields of study include studying materials with at least one dimension restricted to the nanoscale and the transfer of energy, electrons, protons, and matter across environmental interfaces.
The Geochemical Society is a nonprofit scientific organization founded to encourage the application of chemistry to solve problems involving geology and cosmology. The society promotes understanding of geochemistry through the annual Goldschmidt Conference, publication of a peer-reviewed journal and electronic newsletter, awards programs recognizing significant accomplishments in the field, and student development programs. The society's offices are located on the campus of the Carnegie Institution for Science in Washington, DC.
Alexandra Navrotsky is a physical chemist in the field of nanogeoscience. She is an elected member of the United States National Academy of Sciences (NAS) and the American Philosophical Society (APS). She was a board member of the Earth Sciences and Resources division of the NAS from 1995 until 2000. In 2005, she was awarded the Urey Medal, by the European Association of Geochemistry. In 2006, she was awarded the Harry H. Hess Medal, by the American Geophysical Union. She is currently the director of NEAT ORU, a primary program in nanogeoscience. She is distinguished professor at University of California, Davis.
Jillian Fiona Banfield is professor at the University of California, Berkeley with appointments in the Earth Science, Ecosystem Science and Materials Science and Engineering departments. She leads the Microbial Research initiative within the Innovative Genomics Institute, is affiliated with Lawrence Berkeley National Laboratory and has a position at the University of Melbourne, Australia. Some of her most noted work includes publications on the structure and functioning of microbial communities and the nature, properties and reactivity of nanomaterials.
Dimitri Alexander Sverjensky is a professor in Earth and Planetary Sciences at Johns Hopkins University where his research is focused on geochemistry.
Titanium dioxide nanoparticles, also called ultrafine titanium dioxide or nanocrystalline titanium dioxide or microcrystalline titanium dioxide, are particles of titanium dioxide with diameters less than 100 nm. Ultrafine TiO2 is used in sunscreens due to its ability to block ultraviolet radiation while remaining transparent on the skin. It is in rutile crystal structure and coated with silica or/and alumina to prevent photocatalytic phenomena. The health risks of ultrafine TiO2 from dermal exposure on intact skin are considered extremely low, and it is considered safer than other substances used for ultraviolet protection.
Anat Shahar is a staff scientist at the Earth and Planets Laboratory, Carnegie Institution of Washington and adjunct professor at the University of Maryland. Her work uses high-pressure, high-temperature experiments and stable isotope geochemistry to understand the formation of planets in the Solar System.
Zinc oxide nanoparticles are nanoparticles of zinc oxide (ZnO) that have diameters less than 100 nanometers. They have a large surface area relative to their size and high catalytic activity. The exact physical and chemical properties of zinc oxide nanoparticles depend on the different ways they are synthesized. Some possible ways to produce ZnO nano-particles are laser ablation, hydrothermal methods, electrochemical depositions, sol–gel method, chemical vapor deposition, thermal decomposition, combustion methods, ultrasound, microwave-assisted combustion method, two-step mechanochemical–thermal synthesis, anodization, co-precipitation, electrophoretic deposition, and precipitation processes using solution concentration, pH, and washing medium. ZnO is a wide-bandgap semiconductor with an energy gap of 3.37 eV at room temperature.
Nanoinformatics is the application of informatics to nanotechnology. It is an interdisciplinary field that develops methods and software tools for understanding nanomaterials, their properties, and their interactions with biological entities, and using that information more efficiently. It differs from cheminformatics in that nanomaterials usually involve nonuniform collections of particles that have distributions of physical properties that must be specified. The nanoinformatics infrastructure includes ontologies for nanomaterials, file formats, and data repositories.
Patricia Martin Dove is an American geochemist. She is a university distinguished professor and the C.P. Miles Professor of Science at Virginia Tech with appointments in the department of geosciences and department of chemistry. Her research focuses on the kinetics and thermodynamics of mineral reactions with aqueous solutions in biogeochemical systems. Much of her work is on crystal nucleation and growth during biomineralization and biomaterial synthesis. She was elected a member of the National Academy of Sciences (NAS) in 2012 and currently serves as chair of Class I, Physical and Mathematical Sciences.
Donald L. Sparks is an American soil scientist, currently Unidel S. Hallock duPont Chair of Soil and Environmental Chemistry, Francis Alison Professor, and Director, Delaware Environmental Institute, University of Delaware.
Wendy Li-Wen Mao is an American geologist who is a professor at SLAC National Accelerator Laboratory. Her research considers the mineral physics of planetary interiors, new materials under extreme environments and novel characterisation techniques. In 2021 she was elected Fellow of the European Association of Geochemistry.
Catherine Ann McCammon is a Canadian geoscientist who is employed by the University of Bayreuth. Her research focuses on surface and mantle processes, as well as the physics and chemistry of minerals. She is a Fellow of the European Association of Geochemistry and American Geophysical Union. In 2013, she was awarded the European Geosciences Union Robert Wilhelm Bunsen medal. She is the editor of the journal Physics and Chemistry of Minerals.
R. Lee Penn is an American chemist and the Merck Professor of Chemistry at the University of Minnesota. Their research considers crystal growth, materials and environmental chemistry. Penn is a Fellow of the American Chemical Society. In 2020 Penn was awarded the University of Minnesota George W. Taylor Award for Distinguished Service.
Emilie Ringe is an American chemist who is an Assistant Professor at the University of Cambridge. She was selected by Chemical & Engineering News as one of its "Talented Twelve" young scientists in 2021.
Daniele Cherniak is an American geochemist known for her work on using particle beams for geochemical analysis on small scales. She was elected a fellow of the American Geophysical Union in 2021.
