{"id":60011,"date":"2010-02-25T16:07:09","date_gmt":"2010-02-25T16:07:09","guid":{"rendered":"http:\/\/www.image-archive.org.uk\/?p=60011"},"modified":"2024-06-16T15:01:13","modified_gmt":"2024-06-16T14:01:13","slug":"roof-fall-caused-by-carnalite-at-boulby","status":"publish","type":"post","link":"http:\/\/www.image-archive.org.uk\/?p=60011","title":{"rendered":"Roof Fall Caused by Carnalite at Boulby"},"content":{"rendered":"<div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1600\" height=\"1200\" src=\"http:\/\/www.image-archive.org.uk\/wp-content\/uploads\/2019\/04\/430-carnallite-002-a-11.jpg\" alt=\"\" class=\"wp-image-60010\" style=\"width:785px;height:auto\" srcset=\"http:\/\/www.image-archive.org.uk\/wp-content\/uploads\/2019\/04\/430-carnallite-002-a-11.jpg 1600w, http:\/\/www.image-archive.org.uk\/wp-content\/uploads\/2019\/04\/430-carnallite-002-a-11-300x225.jpg 300w, http:\/\/www.image-archive.org.uk\/wp-content\/uploads\/2019\/04\/430-carnallite-002-a-11-400x300.jpg 400w, http:\/\/www.image-archive.org.uk\/wp-content\/uploads\/2019\/04\/430-carnallite-002-a-11-150x113.jpg 150w\" sizes=\"auto, (max-width: 1600px) 100vw, 1600px\" \/><\/figure>\n<\/div>\n\n\n<p><strong>Just to show that even modern mining isn\u2019t without its hazards, here\u2019s an image of a roof fall caused by the somewhat unstable (in air) compound Carnalite. A web definition: Carnalite (KMgCl3\u00b76H2O, hydrous magnesium and potassium chloride). Carnalite crystallizes in a rhombic system and has a hardness of 2.5, the same as the finger nail. It usually displays a granular structure. Carnalite can be colourless, pinkish or reddish, always with a vitreous gloss. Carnalite is deliquescent, it dissolves even in the air humidity. Its taste is salty, spicy after the potassium and bitter after the magnesium content. Ian Benson tells us: \u201dCleveland Potash did look at the possibility&nbsp; of mining Carnalite but decided it would prove to difficult and hazardous.\u201d The image is an obvious example of this problem.<br>Image courtesy of Alan M. Franks and thanks to Ian Benson for the update.<\/strong> <\/p>\n","protected":false},"excerpt":{"rendered":"\n<p>Just to show that even modern mining isn\u2019t without its hazards, here\u2019s an image of a roof fall caused by the somewhat unstable (in air) compound Carnalite. A web definition: Carnalite (KMgCl3\u00b76H2O, hydrous magnesium and potassium chloride). Carnalite crystallizes in a rhombic system and has a hardness of 2.5, the same as the finger [&#8230;]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[32],"tags":[],"class_list":["post-60011","post","type-post","status-publish","format-standard","hentry","category-potash-mines","odd"],"_links":{"self":[{"href":"http:\/\/www.image-archive.org.uk\/index.php?rest_route=\/wp\/v2\/posts\/60011","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.image-archive.org.uk\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.image-archive.org.uk\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.image-archive.org.uk\/index.php?rest_route=\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"http:\/\/www.image-archive.org.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=60011"}],"version-history":[{"count":4,"href":"http:\/\/www.image-archive.org.uk\/index.php?rest_route=\/wp\/v2\/posts\/60011\/revisions"}],"predecessor-version":[{"id":78802,"href":"http:\/\/www.image-archive.org.uk\/index.php?rest_route=\/wp\/v2\/posts\/60011\/revisions\/78802"}],"wp:attachment":[{"href":"http:\/\/www.image-archive.org.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=60011"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.image-archive.org.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=60011"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.image-archive.org.uk\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=60011"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}