Fluorite (Fluorite)
[Chemical composition] Rare earth elements (mainly Th, Ce, U) and Y can replace Ca in the form of isomorphism, or can be adsorbed in the fissures of fluorite , or form a solid inclusion in the form of solid inclusions. Stone. In addition, it also contains a mixture of Fe 2 O 3 , Al 2 O 3 , SiO 2 , and a bituminous substance (blackish black, heated and odorous). [crystal structure] equiaxed crystal system; Figure H-23 Crystal of fluorite Figure H-24 Twin crystal of fluorite (quoted from Pan Zhaoyu et al., 1993) [Form] The crystal is often in the cube {100}, followed by the octahedron {111}, a few have the rhombohedron {110}, sometimes the tetrahexahedron {210} and the hexahedron {421}, etc. (Fig. H-23 )). The cubic crystal face often has a parquet floor strip parallel to the rib. Often (111) into interspersed twins (Figure H-24). The aggregates are grainy, massive, spheroidal, and occasionally earthy blocks. The fluorite crystal morphology has a characterization characteristic that varies with the pH and ion concentration of the medium. Crystallization in alkaline solution, F - ions play a dominant role, and the development of a large network density F- ions surface plane {100} crystal into cubes; crystallization solution in a neutral, Ca 2+ and F - a considerable role, The crystal plane with the highest density of surface network composed of Ca 2+ and F - is {110} into a rhombohedral dodecahedron; in an acidic medium, Ca 2+ plays a dominant role and develops the crystal plane with the highest density of Ca 2+ surface network. 111} and form an octahedron. [Physical properties] Various colors, colorless, white, yellow, green, blue, purple, purple black and black, the coloring mechanism is also very complicated, mainly for color centering, that is, radiation damage caused by radioactive elements The lattice defect and Na + , K + → Ca 2+ cause F - absent to form a color center. When heated, it can fade; glass luster. Cleavage {111} is complete. Hardness 4. The relative density of 3.18 (comprising Y, Ce by increasing the relative density, relative density yttrium fluorite 3.3). Crisp. The melting point of 1270 ~ 1350 ° C. Fluorite has a spin-rotation property, and the thermal luminescence intensity is related to the rare earth content and the Na content. [genesis and production] mainly hydrothermal type, but also sedimentary type. [Identification characteristics] According to its crystal form, {111} complete cleavage, hardness 4 and various light colors and other features are easy to identify, in addition to fluorescence, thermo-optic test can also assist in identification. [Uses] as a flux in the metallurgical industry, used in making a fluoride (such as hydrofluoric acid), manufactured by the opaque white glass and enamel and glass ceramics in the chemical industry. It can also be used in optical instruments and engraving processes. Adhesive labels are widely used for packaging of various kinds of commodities such as dairy products, food, household products, chemical products, beverage, drink water, juice, garment, gift, electrical appliances, shaped bottles and cups etc.We can make scratch off self adhesive label with QR code,series number,ect. Accept OEM order,it can be company's logo and website in your label.here are two basic types of self adhesive labels: permanent and removable. Each type of adhesive is made from a variety of glues depending on the conditions the label will have to endure, the length of time it is required and the environment or conditions of storage. Self Adhesive Labels,Custom Label Printing,Self Adhesive Label Printing Sticker Shenzhen Tuteng Anti-Counterfeiting Co., Ltd. , https://www.szholographicsticer.com
a 0 = 0.545 nm; Z = 4.
Self Adhesive labels are usually coated with an acrylic, rubber or water-based glue. Sticky labels can either be applied permanently or temporally.
Self adhesive labels can printed on by laser printers, inkjet printers, photocopiers or handwritten. Laser printers and photocopiers are a hot process and we recommend that A4 sheets of labels are only printed once for best results. The heat process evaporates the moisture in the adhesive each time it is passed through the printer.