Experience the fascinating phenomenon as high-purity cesium chloride under vacuum is excited by a simple Tesla coil. The white salt immediately undergoes a stunning transformation, turning into a dark blue hue amidst a bluish glow. This captivating effect is a result of chlorine atoms being “ejected” from the CsCl crystal lattice, causing the salt to assume its blue color. After a few minutes, the blue hue gradually fades away and turns blue again, when excited. This phenomenon is called f-center formation.<\/p>\n
An F center, also known as a Farbe center (derived from the German term “Farbzentrum,” where “Farbe” means color and “zentrum” means center), refers to a specific crystallographic defect found within a crystal lattice. This defect occurs when an anionic vacancy within the lattice is filled by one or more unpaired electrons. Due to this configuration, electrons residing within such vacancies have a tendency to absorb light within the visible spectrum. As a result, a typically transparent material undergoes a transformation and becomes colored. The intensity of the compound’s color is directly proportional to the quantity of F centers present. Essentially, F centers represent a type of color center within the crystal structure.<\/p>\n
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Cesium chloride discharge tube – NEW<\/p>\n
~1g CsCl 99.999% in ampoule under high vacuum. For F-center experiments with tesla coils.<\/p>","protected":false},"featured_media":49358,"template":"","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"product_brand":[],"product_cat":[101,96,47],"product_tag":[],"class_list":{"0":"post-6430","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-cl","7":"product_cat-cs","8":"product_cat-discharge-lamps","9":"desktop-align-left","10":"tablet-align-left","11":"mobile-align-left","12":"ast-product-gallery-layout-horizontal-slider","13":"ast-product-gallery-with-no-image","14":"ast-product-tabs-layout-horizontal","15":"ast-qv-on-image","17":"first","18":"instock","19":"taxable","20":"shipping-taxable","21":"purchasable","22":"product-type-simple"},"acf":[],"_links":{"self":[{"href":"https:\/\/smart-elements.com\/de\/wp-json\/wp\/v2\/product\/6430","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/smart-elements.com\/de\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/smart-elements.com\/de\/wp-json\/wp\/v2\/types\/product"}],"version-history":[{"count":0,"href":"https:\/\/smart-elements.com\/de\/wp-json\/wp\/v2\/product\/6430\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/smart-elements.com\/de\/wp-json\/wp\/v2\/media\/49358"}],"wp:attachment":[{"href":"https:\/\/smart-elements.com\/de\/wp-json\/wp\/v2\/media?parent=6430"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/smart-elements.com\/de\/wp-json\/wp\/v2\/product_brand?post=6430"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/smart-elements.com\/de\/wp-json\/wp\/v2\/product_cat?post=6430"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/smart-elements.com\/de\/wp-json\/wp\/v2\/product_tag?post=6430"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}