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  2. Hierarchy of precious substances - Wikipedia

    en.wikipedia.org/wiki/Hierarchy_of_precious...

    Wedding anniversaries extend the jubilee hierarchy with various sequences of substances filling in many of the gaps between the same major milestones. In 2017 the 65th anniversary of the accession of Elizabeth II was widely referred to as her "sapphire jubilee" or more specifically as her blue sapphire jubilee (see Sapphire Jubilee of Queen Elizabeth II) [1] but more traditionally the sapphire ...

  3. Comparison of Java virtual machines - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_Java_virtual...

    1.8 No Yes Yes No Yes HotSpot, Java SE embedded edition ? No Yes Yes No Yes HotSpot, Zero port Interpreter-only port of OpenJDK using almost no assembly language and designed to be very portable. 1.7 No Yes Yes No No IKVM.NET? ? ? Whatever the .NET runtime uses JAmiga: 1.4 [17] Yes [18] No Yes [19] No No JamVM: 1.8 [20] Yes [21] Yes [21] Yes ...

  4. List of fictional elements, materials, isotopes and subatomic ...

    en.wikipedia.org/wiki/List_of_fictional_elements...

    Stygian Iron Rick Riordan (Introduced in The Battle of the Labyrinth.) A type of iron mined in the Underworld and forged in the River Styx. Unlike Celestial Bronze and Imperial Gold, monsters killed by it cannot reform, and it can kill non-magical creatures as well as magical creatures. Supermanium

  5. Lonsdaleite - Wikipedia

    en.wikipedia.org/wiki/Lonsdaleite

    Its diamond structure can be considered to be made up of interlocking rings of six carbon atoms, in the chair conformation. In lonsdaleite, some rings are in the boat conformation instead. At nanoscale dimensions, cubic diamond is represented by diamondoids while hexagonal diamond is represented by wurtzoids .

  6. Allotropes of carbon - Wikipedia

    en.wikipedia.org/wiki/Allotropes_of_carbon

    Between diamond and graphite: Diamond crystallizes in the cubic system but graphite crystallizes in the hexagonal system. Diamond is clear and transparent, but graphite is black and opaque. Diamond is the hardest mineral known (10 on the Mohs scale), but graphite is one of the softest (1–2 on Mohs scale).

  7. Amorphous metal - Wikipedia

    en.wikipedia.org/wiki/Amorphous_metal

    Metglas-2605 is composed of 80% iron and 20% boron, has a Curie temperature of 646 K (373 °C; 703 °F) and a room temperature saturation magnetization of 1.56 teslas. [ 7 ] In the early 1980s, glassy ingots with a diameter of 5 mm (0.20 in) were produced with an alloy of 55% palladium, 22.5% lead, and 22.5% antimony, by surface etching ...

  8. Crystal system - Wikipedia

    en.wikipedia.org/wiki/Crystal_system

    R = n 1 a 1 + n 2 a 2 + n 3 a 3, where n 1 , n 2 , and n 3 are integers and a 1 , a 2 , and a 3 are three non-coplanar vectors, called primitive vectors . These lattices are classified by the space group of the lattice itself, viewed as a collection of points; there are 14 Bravais lattices in three dimensions; each belongs to one lattice system ...

  9. Diamond cubic - Wikipedia

    en.wikipedia.org/wiki/Diamond_cubic

    The lattice describes the repeat pattern; for diamond cubic crystals this lattice is "decorated" with a motif of two tetrahedrally bonded atoms in each primitive cell, separated by ⁠ 1 / 4 ⁠ of the width of the unit cell in each dimension. [1] The diamond lattice can be viewed as a pair of intersecting face-centered cubic lattices, with ...