Given the question: Information: - A metal (from Greek "metallon", "mine, quarry, metal") is a material (an element, compound, or alloy) that is typically hard, opaque, shiny, and has good electrical and thermal conductivity. Metals are generally malleable that is, they can be hammered or pressed permanently out of shape without breaking or cracking as well as fusible (able to be fused or melted) and ductile (able to be drawn out into a thin wire). About 91 of the 118 elements in the periodic table are metals, the others are nonmetals or metalloids. Some elements appear in both metallic and non-metallic forms. - In chemistry, the term transition metal (or transition element) has three possible meanings: - In chemistry and physics, the atomic number of a chemical element (also known as its proton number) is the number of protons found in the nucleus of an atom of that element, and therefore identical to the charge number of the nucleus. It is conventionally represented by the symbol Z. The atomic number uniquely identifies a chemical element. In an uncharged atom, the atomic number is also equal to the number of electrons. - Pyrochlore (Na,Ca)NbO(OH,F) is a mineral group of the niobium end member (pyrochlore supergroup). - Niobium, formerly columbium, is a chemical element with symbol Nb (formerly Cb) and atomic number 41. It is a soft, grey, ductile transition metal, which is often found in the pyrochlore mineral, the main commercial source for niobium, and columbite. The name comes from Greek mythology: "Niobe", daughter of "Tantalus" since it is so similar to tantalum. - A chemical element or element is a species of atoms having the same number of protons in their atomic nuclei (i.e. the same atomic number, "Z"). There are 118 elements that have been identified, of which the first 94 occur naturally on Earth with the remaining 24 being synthetic elements. There are 80 elements that have at least one stable isotope and 38 that have exclusively radioactive isotopes, which decay over time into other elements. Iron is the most abundant element (by mass) making up Earth, while oxygen is the most common element in the Earth's crust. - Tantalus ("Tantalos") was a Greek mythological figure, most famous for his eternal punishment in Tartarus. He was made to stand in a pool of water beneath a fruit tree with low branches, with the fruit ever eluding his grasp, and the water always receding before he could take a drink. He was the father of Pelops, Niobe and Broteas, and was a son of Zeus and the nymph Plouto. Thus, like other heroes in Greek mythology such as Theseus and the Dioskouroi, Tantalus had both a hidden, divine parent and a mortal one. - In Greek mythology, Niobe was a daughter of Tantalus and of either Dione, the most frequently cited, or of Eurythemista or Euryanassa, and the sister of Pelops and Broteas. - Columbite, also called niobite, niobite-tantalite and columbate [(Fe, Mn)NbO], is a black mineral group that is an ore of niobium. It has a submetallic luster and a high density and is a niobate of iron and manganese. This mineral group was first found in Haddam, Connecticut, in the United States. It forms a series with the tantalum-dominant analogue ferrotantalite and one with the manganese-dominant analogue manganocolumbite. The iron-rich member of the columbite group is ferrocolumbite. Some tin and tungsten may be present in the mineral. Yttrocolumbite is the yttrium-rich columbite with the formula (Y,U,Fe)(Nb,Ta)O. It is a radioactive mineral found in Mozambique. - Greek mythology is the body of myths and teachings that belong to the ancient Greeks, concerning their gods and heroes, the nature of the world, and the origins and significance of their own cult and ritual practices. It was a part of the religion in ancient Greece. Modern scholars refer to and study the myths in an attempt to shed light on the religious and political institutions of Ancient Greece and its civilization, and to gain understanding of the nature of myth-making itself. - Pyrochlore ( Na , Ca ) 2Nb2O6 ( OH , F ) is a solid solution between the niobium end member ( pyrochlore ) and the tantalum end member ( microlite ) . - Tantalum is a chemical element with symbol Ta and atomic number 73. Previously known as "tantalium", its name comes from "Tantalus", a villain from Greek mythology. Tantalum is a rare, hard, blue-gray, lustrous transition metal that is highly corrosion-resistant. It is part of the refractory metals group, which are widely used as minor components in alloys. The chemical inertness of tantalum makes it a valuable substance for laboratory equipment and a substitute for platinum. Its main use today is in tantalum capacitors in electronic equipment such as mobile phones, DVD players, video game systems and computers. Tantalum, always together with the chemically similar niobium, occurs in the minerals tantalite, columbite and coltan (a mix of columbite and tantalite). After reading the paragraphs above, we are interested in knowing the entity with which 'pyrochlore' exhibits the relationship of 'subclass of'. Find the answer from the choices below. Choices: - blue - chemical element - chemistry - density - drink - dvd - formula - fruit tree - game - good - gray - greek - greeks - group - iron - laboratory equipment - manganese - material - member - metal - mine - mineral - myth - niobium - nucleus - nymph - ore - out - own - oxygen - punishment - pyrochlore supergroup - religious - ritual - shed - supergroup - tantalum - term - time - tin - tree - tungsten - video - video game - villain - water - world - yttrium
The answer is:
pyrochlore supergroup