An isotopical pure diamond is a type of diamond that is composed entirely of one isotope of carbon. Isotopically pure diamonds have been manufactured from either the more common carbon isotope with mass number 12 (abbreviated as 12C) or the less common 13C isotope. Compared to natural diamonds that are composed of a mixture of 12C and 13C isotopes, isotopically pure diamonds possess improved characteristics such as increased thermal conductivity.[1] Thermal conductivity of diamonds is at a minimum when 12C and 13C are in a ratio of 1:1 and reaches a maximum when the composition is 100% 12C or 100% 13C.[1]
^ abAnthony TR, Banholzer; Banholzer, W (April 1992). "Properties of diamond with varying isotopic composition". Diamond and Related Materials. 1 (5–6): 717–726. Bibcode:1992DRM.....1..717A. doi:10.1016/0925-9635(92)90197-V.
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any known solid. Single crystals of synthetic diamond enriched in 12 C (99.9%), isotopicallypurediamond, have the highest thermal conductivity of any...
depend on the nanoribbon edge structure and the electron energy. Isotopicallypurediamond can have a significantly higher thermal conductivity. See List...
highest thermal conductivity ever measured (41,000 W/(m·K) for an isotopicallypurediamond sample at 104 K). Even at room temperature, the thermal conductivity...
would be both chemically and isotopicallypure, since ordinary gold consists only of one isotope, 197Au. Atoms of chemically pure elements may bond to each...
known, with a hardness just below that of diamond and comparable with those of cubic boron nitride and boron. Pure synthetic moissanite can also be made from...
cause, especially in purediamonds. A high-pressure high-temperature treatment can heal lattice defects and convert brown diamonds into yellow or even...
of diamonds are formed from methane on the ice giant planets Uranus and Neptune, while some planets in other planetary systems may be almost pure diamond...
against 13C. In 1961, the International Union of Pure and Applied Chemistry (IUPAC) adopted the isotope carbon-12 as the basis for atomic weights. Identification...
through decay. Price per volume for 0 °C, 101.325 kPa, pure element. For individual isotopes except deuterium, density of base element is used. Spot...
over 238Pu is that it is produced as nuclear waste and is nearly isotopicallypure. Prototype designs of 241Am RTGs expect 2-2.2 We/kg for 5–50 We RTGs...
produced from Lithium-6 which is often enriched for this purpose, too. Some isotopically purified elements are used in smaller quantities for specialist applications...
synthetic diamonds. Many of the diamonds at Popigai contain crystalline lonsdaleite, an allotrope of carbon that has a hexagonal lattice. Pure, laboratory-created...
substance to a desired degree, the resulting substance is said to be chemically pure. Chemical substances can exist in several different physical states or phases...
hexagonal; at high pressures and temperatures it forms diamond (see below). Silicon and germanium have diamond cubic crystal structures, as does tin at low temperatures...
W. F. (16 February 1993). "Thermal conductivity of isotopically modified single crystal diamond". Physical Review Letters. 70 (24): 3764–3767. Bibcode:1993PhRvL...
in chemotherapy against certain types of cancer. Pure platinum is currently less expensive than pure gold, having been so continuously since 2015, but...
on compounds which would be thermally and chemically more stable than purediamond. The search for new superhard materials has generally taken two paths...
reduced the amount of isotopicallypure einsteinium roughly tenfold. Heavy neutron irradiation of plutonium results in four major isotopes of einsteinium: 253Es...
heavy hydrogen isotope. Heavy water contains deuterium atoms and is used in nuclear reactors. Semiheavy water (HDO) is more common than pure heavy water...
Jöns Jakob Berzelius was first able to prepare it and characterize it in pure form. Its oxides form a family of anions known as silicates. Its melting...
optical properties. For example, one-phonon (infrared) absorption in purediamond lattice is forbidden because the lattice has an inversion center. However...
of the parent isotope 249Bk and a large cross section of interaction with neutrons, but it can be accumulated in the isotopicallypure form as the β-decay...
2008-09-24.[dead link] "diamond-like carbon films". IUPAC Compendium of Chemical Terminology (2nd ed.). International Union of Pure and Applied Chemistry...
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