Spodumene
71Pyroxene — Figure 1: A sample of pyroxenite, a rock consisting mostly of pyroxene minerals. The pyroxenes are a group of important rock forming inosilicate minerals found in many igneous and metamorphic rocks. They share a common structure consisting of… …
72Petalite — Infobox mineral name = Petalite category = boxwidth = boxbgcolor = imagesize = caption = formula = lithium aluminium tectosilicate mineral LiAlSi4O10 molweight = color = colorless, grey, yellow, yellow grey, to white habit = tabular prismatic… …
73Period 2 element — A period 2 element is one of the chemical elements in the second row (or period) of the periodic table of the chemical elements. The periodic table is laid out in rows to illustrate recurring (periodic) trends in the chemical behaviour of the… …
74List of chemistry topics — This page aims to list articles related to chemistry. This is so that those interested in the subject can monitor changes to the pages by clicking on Related Changes in the sidebar and on the bottom of the page.This list is not necessarily… …
75Glass-ceramic — materials share many properties with both glass and more traditional crystalline ceramics. It is formed as a glass, and then made to crystallize partly by heat treatment. Unlike sintered ceramics, glass ceramics have no pores between crystals.… …
76Laghman Province — Laghman ( fa. لغمان) is one of the thirty four provinces of Afghanistan. Located in the eastern portion of Afghanistan, the capital is Mihtarlam. The province is composed of several districts including: Alingar, Alishing, Dawlat Shah, Mihtarlam,… …
77Stoneware — a vitreous or semivitreous ceramic ware of fine texture, made primarily from nonrefactory fire clay. [Standard Terminology Of Ceramic Whiteware and Related Products. ASTM Standard C242.] Its maturation temperature ranges from about 1200°C to 1315 …
78Tenebrescence — Tenebrescence, also known as reversible photochromism , is the ability of minerals to change colour when exposed to sunlight. The effect can be repeated indefinitely, but is destroyed by heating.Tenebrescent minerals include hackmanite sodalite,… …
79José Bonifácio de Andrada e Silva — (June 13, 1763 ndash; April 6, 1838), Brazilian statesman, naturalist and professor, was born in Santos, São Paulo, then a territory of the Portuguese Empire. He discovered and described four minerals, including most importantly petalite, in… …
80Zinnwaldite — Infobox mineral name = Zinnwaldite category = Phyllosilicate mineral boxwidth = boxbgcolor = imagesize = 240px caption = formula = KLiFeAl(AlSi3)O10(OH,F)2 molweight = color = Light brown to yellowish or greenish white habit = Micaceous, platey… …
