[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"minerals:one:20574":3},{"id":4,"longid":5,"guid":6,"name":7,"shortcode_ima":8,"entrytype":9,"entrytype_text":10,"varietyof":11,"synid":8,"polytypeof":8,"groupid":8,"weighting":12,"nolocadd":13,"blacklisted":13,"mindat_formula":8,"mindat_formula_note":8,"ima_formula":8,"elements":14,"sigelements":18,"key_elements":8,"impurities":8,"cim":8,"ima_status":8,"ima_notes":8,"ima_history":8,"approval_year":8,"publication_year":8,"discovery_year":8,"strunz10ed1":19,"strunz10ed2":19,"strunz10ed3":19,"strunz10ed4":8,"dana8ed1":8,"dana8ed2":8,"dana8ed3":8,"dana8ed4":8,"csystem":8,"cclass":8,"spacegroup":8,"spacegroupset":19,"a":8,"b":8,"c":8,"alpha":8,"beta":8,"gamma":8,"aerror":8,"berror":8,"cerror":8,"alphaerror":8,"betaerror":8,"gammaerror":8,"va3":8,"z":8,"csmetamict":13,"commentcrystal":8,"twinning":8,"tranglide":8,"parting":8,"epitaxidescription":8,"morphology":8,"tlform":8,"hmin":8,"hmax":8,"hardtype":8,"vhnmin":8,"vhnmax":8,"vhnerror":8,"vhng":8,"vhns":8,"commenthard":8,"dmeas":8,"dmeas2":8,"dcalc":8,"dmeaserror":8,"dcalcerror":8,"commentdense":8,"lustre":8,"lustretype":8,"commentluster":8,"diapheny":8,"streak":8,"colour":8,"commentcolor":8,"colors":8,"streak_colors":8,"luminescence":8,"uv":8,"cleavage":8,"cleavagetype":8,"fracturetype":8,"tenacity":8,"commentbreak":8,"opticaltype":8,"opticalsign":8,"opticalalpha":8,"opticalalpha2":8,"opticalalphaerror":8,"opticalbeta":8,"opticalbeta2":8,"opticalbetaerror":8,"opticalgamma":8,"opticalgamma2":8,"opticalgammaerror":8,"opticalomega":8,"opticalomega2":8,"opticalomegaerror":8,"opticalepsilon":8,"opticalepsilon2":8,"opticalepsilonerror":8,"opticaln":8,"opticaln2":8,"opticalnerror":8,"optical2vcalc":8,"optical2vcalc2":8,"optical2vcalcerror":8,"optical2vmeasured":8,"optical2vmeasured2":8,"optical2vmeasurederror":8,"rimin":8,"rimax":8,"opticaldispersion":8,"opticalpleochroism":8,"opticalpleochorismdesc":8,"opticalbirefringence":8,"opticalcomments":8,"opticalcolour":8,"opticalinternal":8,"opticaltropic":8,"opticalanisotropism":8,"opticalbireflectance":8,"opticalextinction":8,"opticalr":8,"specdispm":8,"ir":8,"electrical":8,"magnetism":8,"thermalbehaviour":8,"other":8,"industrial":8,"occurrence":8,"otheroccurrence":8,"type_specimen_store":8,"description_short":8,"aboutname":8,"rock_parent":8,"rock_parent2":8,"rock_root":20,"rock_bgs_code":8,"meteoritical_code":8,"updttime":21,"reviewed_at":8,"variety_of":22,"varieties":32,"group_members":33,"associates":34,"confused_with":35,"type_localities":36,"occurrence_total":37,"citations":38,"images":39,"structures":57,"synonyms":58,"language_names":59,"wikidata_qid":8,"texts":60},20574,"1:1:20574:4","1d477554-c105-41f0-8ecc-84e3dd6afbbf","Papierspat",null,2,"variety",859,42,false,[15,16,17],"Ca","O","C",[15,16,17],"0",0,"2025-08-11 12:14:44",{"id":11,"name":23,"entrytype":20,"csystem":24,"ima_formula":25,"mindat_formula":26,"hmin":27,"hmax":27,"dmeas":28,"dcalc":29,"strunz10ed1":30,"primary_image_id":31},"Calcite","Trigonal","Ca(CO\u003Csub>3\u003C\u002Fsub>)","CaCO\u003Csub>3\u003C\u002Fsub>",3,"2.7102","2.711","5",4401,[],[],[],[],[],4,[],[40,50],{"id":41,"source_url":42,"license_code":43,"credit_html":44,"title":45,"description":46,"author":47,"original_width":48,"original_height":49},72478,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=165872480","CC BY 2.0","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=165872480\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Calcite (Dalnegorsk Skarn Deposit, Late Cretaceous, 70-90 Ma; 2nd Sovietsky Mine, Dalnegorsk, Russia) 6.jpg","\"Papierspath\" calcite from the Cretaceous of Russia.\n\u003Cp>A mineral is a naturally-occurring, solid, inorganic, crystalline substance having a fairly definite chemical composition and having fairly definite physical properties.  At its simplest, a mineral is a naturally-occurring solid chemical.  Currently, there are over 6100 named and described minerals - about 200 of them are common and about 20 of them are very common.  Mineral classification is based on anion chemistry.  Major categories of minerals are: elements, sulfides, oxides, halides, carbonates, sulfates, phosphates, and silicates.\n\u003C\u002Fp>\u003Cp>The carbonate minerals all contain one or more carbonate (CO3-2) anions.\n\u003C\u002Fp>\u003Cp>Calcite is a common mineral.  It is calcium carbonate (CaCO3).  It has a nonmetallic luster, commonly clearish to whitish to yellowish to grayish in color, is moderately soft (H≡3), moderately light-weight, has hexagonal crystals, and rhombohedral cleavage (three cleavage planes at 75º & 105º angles - cleavage pieces look like lopsided boxes).  The easiest way to identify calcite is to drop acid on it - it easily bubbles (effervesces) in acid.  The bubbles are carbon dioxide gas.  If the acid is dilute hydrochloric acid, the chemical reaction is:\n\u003C\u002Fp>\u003Cp>2HCl(aq) + CaCO3(s) -->> CO2(g)↑ + H2O(l) + CaCl2(aq)\n\u003C\u002Fp>\u003Cp>The most important & voluminous calcitic rocks in the world are limestone (sedimentary), marble (metamorphic), carbonatite (igneous), and travertine (speleothem, or \"cave formations\", and many hotspring deposits).  Quite a few hydrothermal veins in the world are calcitic or have calcite as a principal component.\n\u003C\u002Fp>\u003Cp>The very thin calcite crystals seen here are known by the strange nickname \"papierspath\" or \"papierspat\", which is German for \"paper spar\".  The specimen is from a polymetallic sulfide ore body at the famous Dalnegorsk skarn deposit in far-eastern Russia.  The deposit consists of mineral-filled solution cavities in Triassic limestones that have been intruded by Late Cretaceous granodiorites.  The skarn zone itself has been intruded by 64 Ma granite.\n\u003C\u002Fp>\u003Cp>Locality: 2nd Sovietsky Mine (Second Soviet Mine), Dalnegorsk, far-eastern Russia\n\u003C\u002Fp>\n\u003Chr>\n\u003Cp>Photo gallery of calcite:\n\u003C\u002Fp>\nwww.mindat.org\u002Fgallery.php?min=859","James St. John",2904,1962,{"id":51,"source_url":52,"license_code":43,"credit_html":53,"title":54,"description":46,"author":47,"original_width":55,"original_height":56},72479,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=165872481","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=165872481\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Calcite (Dalnegorsk Skarn Deposit, Late Cretaceous, 70-90 Ma; 2nd Sovietsky Mine, Dalnegorsk, Russia) 5.jpg",2788,1978,[],[],[],{"history":8,"applications":8}]