Limescale deposits in the narrower sense denotes the precipitation and / or sedimentation of calcium carbonate ("carbonate of lime"), however, like calcification as a term for the corresponding process, it is also used for analogous formations or processes in which salts other than calcium carbonate, but mostly Calcium salts , are involved:
- In geology, various sedimentary rocks made of calcium carbonate and various admixtures with different origins, for example chalk , reef limestone and travertine ; see limestone , sinter
- in household and technology mostly deposits on fittings, tiles or so-called boiler scale in pots, various equipment and pipes. They arise from the precipitation of mainly calcium carbonate from water; see water hardness .
- In medicine, deposits of calcium salts in the bones ( ossification ), calcareous deposits in tendons and tendon attachments ( tendinitis calcarea ) and non-specific inorganic plaques, especially in arterial vessels , which in many cases have a life-shortening effect. The latter process is often referred to as "hardening of the arteries", even if calcium carbonate does not play a role. For technical terms, see atherosclerosis (arteriosclerosis), parathyroid hormone- induced calcium infiltration of the tissues , microcalcifications in mammography and calcinosis ("chalking", e.g. tuberculous lesions ); see also Fetuin ("anti-calcification protein" in blood plasma )
- Colloquially, a person with declining cognitive abilities is called calcified ( Fahr's disease ), although deposits in the brain do not in principle allow any conclusions to be drawn about performance.
- Gustav Peter, Marc Ladner, René Muntwyler: Baustofflehre. University publisher at the ETH Zurich, Zurich 1995, ISBN 978-3-519-05052-0 , p. 43.
- Calcified head does not like studying (accessed August 31, 2018)