[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"minerals:one:11118":3},{"id":4,"longid":5,"guid":6,"name":7,"shortcode_ima":8,"entrytype":9,"entrytype_text":10,"varietyof":11,"synid":11,"polytypeof":11,"groupid":12,"weighting":13,"nolocadd":14,"blacklisted":14,"mindat_formula":15,"mindat_formula_note":11,"ima_formula":16,"elements":17,"sigelements":25,"key_elements":26,"impurities":27,"cim":11,"ima_status":28,"ima_notes":11,"ima_history":30,"approval_year":11,"publication_year":31,"discovery_year":11,"strunz10ed1":32,"strunz10ed2":33,"strunz10ed3":34,"strunz10ed4":35,"dana8ed1":36,"dana8ed2":36,"dana8ed3":36,"dana8ed4":36,"csystem":37,"cclass":38,"spacegroup":39,"spacegroupset":40,"a":41,"b":42,"c":43,"alpha":36,"beta":44,"gamma":36,"aerror":38,"berror":45,"cerror":38,"alphaerror":11,"betaerror":45,"gammaerror":11,"va3":11,"z":11,"csmetamict":14,"commentcrystal":11,"twinning":46,"tranglide":11,"parting":11,"epitaxidescription":11,"morphology":11,"tlform":47,"hmin":48,"hmax":49,"hardtype":11,"vhnmin":36,"vhnmax":36,"vhnerror":11,"vhng":11,"vhns":11,"commenthard":11,"dmeas":36,"dmeas2":36,"dcalc":50,"dmeaserror":11,"dcalcerror":51,"commentdense":11,"lustre":52,"lustretype":53,"commentluster":11,"diapheny":11,"streak":54,"colour":55,"commentcolor":11,"colors":56,"streak_colors":62,"luminescence":63,"uv":11,"cleavage":64,"cleavagetype":65,"fracturetype":66,"tenacity":67,"commentbreak":11,"opticaltype":68,"opticalsign":69,"opticalalpha":36,"opticalalpha2":36,"opticalalphaerror":11,"opticalbeta":36,"opticalbeta2":36,"opticalbetaerror":11,"opticalgamma":36,"opticalgamma2":36,"opticalgammaerror":11,"opticalomega":36,"opticalomega2":36,"opticalomegaerror":11,"opticalepsilon":36,"opticalepsilon2":36,"opticalepsilonerror":11,"opticaln":36,"opticaln2":36,"opticalnerror":11,"optical2vcalc":36,"optical2vcalc2":36,"optical2vcalcerror":11,"optical2vmeasured":36,"optical2vmeasured2":36,"optical2vmeasurederror":11,"rimin":11,"rimax":11,"opticaldispersion":11,"opticalpleochroism":70,"opticalpleochorismdesc":71,"opticalbirefringence":11,"opticalcomments":72,"opticalcolour":11,"opticalinternal":11,"opticaltropic":11,"opticalanisotropism":11,"opticalbireflectance":11,"opticalextinction":11,"opticalr":11,"specdispm":11,"ir":11,"electrical":11,"magnetism":11,"thermalbehaviour":11,"other":11,"industrial":11,"occurrence":73,"otheroccurrence":11,"type_specimen_store":74,"description_short":11,"aboutname":75,"rock_parent":11,"rock_parent2":11,"rock_root":9,"rock_bgs_code":11,"meteoritical_code":11,"updttime":76,"reviewed_at":11,"variety_of":11,"varieties":77,"group_members":78,"associates":150,"confused_with":151,"type_localities":152,"occurrence_total":48,"citations":159,"images":182,"structures":193,"synonyms":200,"language_names":207,"wikidata_qid":234,"texts":235},11118,"1:1:11118:0","6cdccbe6-1729-4d8d-bd33-5583ecd1ddba","Tweddillite","Twe",0,"mineral",null,46234,53,false,"(CaSr)(Mn\u003Csup>3+\u003C\u002Fsup>AlMn\u003Csup>3+\u003C\u002Fsup>)O[Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>][SiO\u003Csub>4\u003C\u002Fsub>](OH)","CaSr(Mn\u003Csup>3+\u003C\u002Fsup>\u003Csub>2\u003C\u002Fsub>Al)[Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>][SiO\u003Csub>4\u003C\u002Fsub>]O(OH)",[18,19,20,21,22,23,24],"Al","Ca","Mn","Si","Sr","O","H",[18,19,20,21,22,23,24],[22],"Fe",[29],"APPROVED","Originally called tweddillite; renamed manganipiemontite-(Sr) by the Epidote Subcommittee of the CNMMN in 2006; reverted to tweddillite in 2015.",2002,"9","B","G","05","0","Monoclinic",5,15,"P21\u002Fm ","8.932","5.698","10.310","114.56",4,"All crystals are (100) twinned.","Dark-red ‘suns’ of very thin (~0.02 mm) radiating (001) blades, elongated parallel to [010] (up to 0.5 mm).",6,7,"3.84",3,"vitreous","Vitreous","Brownish red","Deep red",[57,58,59,60,61],"red","orange","yellow","pink","brown",[61,57],"none","perfect after {001}","Perfect","Sub-Conchoidal","brittle","Biaxial","+","Strong","Within the (001) blades, the crystals appear dark red parallel to b and orange-yellow parallel to a. Perpendicular to (001) the blades appear magenta to red.","Average RI = 1.825.","In calcsilicate rocks formed as hydrothermal alteration of primary sedimentary manganese ore.","(NMBE 35475) at the Natural History Museum, Bern, Switzerland.","Named by T. Armbruster et al. in 2002 in honor of Samuel Milbourn Tweddill (3 April 1852, Scarborough, Yorkshire, England - 4 July 1917, Groenvlei Tin Mine, Limpopo, South Africa), the first curator of the Pretoria Geological Museum from 1897 to 1916. It was renamed manganipiemontite-(Sr) by the Epidote Subcommittee of the CNMMN in 2006 and reverted to tweddillite in 2015.","2025-10-26 13:48:40",[],[79,87,95,100,106,112,119,127,136,142],{"id":80,"name":81,"entrytype":9,"csystem":37,"ima_formula":82,"mindat_formula":83,"hmin":49,"hmax":49,"dmeas":84,"dcalc":85,"primary_image_id":86},1087,"Clinozoisite","Ca\u003Csub>2\u003C\u002Fsub>Al\u003Csub>3\u003C\u002Fsub>[Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>][SiO\u003Csub>4\u003C\u002Fsub>]O(OH)","(CaCa)(AlAlAl)O[Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>][SiO\u003Csub>4\u003C\u002Fsub>](OH)","3.3","3.23",5912,{"id":88,"name":89,"entrytype":9,"csystem":37,"ima_formula":90,"mindat_formula":91,"hmin":48,"hmax":48,"dmeas":92,"dcalc":93,"primary_image_id":94},1389,"Epidote","Ca\u003Csub>2\u003C\u002Fsub>(Al\u003Csub>2\u003C\u002Fsub>Fe\u003Csup>3+\u003C\u002Fsup>)[Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>][SiO\u003Csub>4\u003C\u002Fsub>]O(OH)","(CaCa)(AlAlFe\u003Csup>3+\u003C\u002Fsup>)O[Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>][SiO\u003Csub>4\u003C\u002Fsub>](OH)","3.38","3.43",92,{"id":96,"name":97,"entrytype":9,"csystem":37,"ima_formula":98,"mindat_formula":99,"hmin":11,"hmax":11,"dmeas":36,"dcalc":36,"primary_image_id":11},31558,"Epidote-(Sr)","CaSr(Al\u003Csub>2\u003C\u002Fsub>Fe\u003Csup>3+\u003C\u002Fsup>)[Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>][SiO\u003Csub>4\u003C\u002Fsub>]O(OH)","(CaSr)(AlAlFe\u003Csup>3+\u003C\u002Fsup>)O[Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>][SiO\u003Csub>4\u003C\u002Fsub>](OH)",{"id":101,"name":102,"entrytype":9,"csystem":37,"ima_formula":103,"mindat_formula":104,"hmin":48,"hmax":49,"dmeas":36,"dcalc":36,"primary_image_id":105},1814,"Hancockite","CaPb(Al\u003Csub>2\u003C\u002Fsub>Fe\u003Csup>3+\u003C\u002Fsup>)[Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>][SiO\u003Csub>4\u003C\u002Fsub>]O(OH)","(CaPb)(AlAlFe\u003Csup>3+\u003C\u002Fsup>)O[Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>][SiO\u003Csub>4\u003C\u002Fsub>](OH)",58083,{"id":107,"name":108,"entrytype":9,"csystem":37,"ima_formula":109,"mindat_formula":110,"hmin":48,"hmax":11,"dmeas":11,"dcalc":111,"primary_image_id":11},470696,"Heflikite","Ca\u003Csub>2\u003C\u002Fsub>(Al\u003Csub>2\u003C\u002Fsub>Sc)(Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>)(SiO\u003Csub>4\u003C\u002Fsub>)O(OH)","(CaCa)(AlAlSc)O[Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>][SiO\u003Csub>4\u003C\u002Fsub>](OH)","3.537",{"id":113,"name":114,"entrytype":9,"csystem":37,"ima_formula":115,"mindat_formula":116,"hmin":117,"hmax":117,"dmeas":36,"dcalc":118,"primary_image_id":11},2805,"Mukhinite","Ca\u003Csub>2\u003C\u002Fsub>(Al\u003Csub>2\u003C\u002Fsub>V\u003Csup>3+\u003C\u002Fsup>)[Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>][SiO\u003Csub>4\u003C\u002Fsub>]O(OH)","(CaCa)(AlAlV\u003Csup>3+\u003C\u002Fsup>)O[Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>][SiO\u003Csub>4\u003C\u002Fsub>](OH)",8,"3.47",{"id":120,"name":121,"entrytype":9,"csystem":37,"ima_formula":122,"mindat_formula":123,"hmin":38,"hmax":124,"dmeas":36,"dcalc":125,"primary_image_id":126},11460,"Niigataite","CaSrAl\u003Csub>3\u003C\u002Fsub>[Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>][SiO\u003Csub>4\u003C\u002Fsub>]O(OH)","(CaSr)(AlAlAl)O[Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>][SiO\u003Csub>4\u003C\u002Fsub>](OH)",5.5,"3.63",5919,{"id":128,"name":129,"entrytype":9,"csystem":37,"ima_formula":130,"mindat_formula":131,"hmin":48,"hmax":132,"dmeas":133,"dcalc":134,"primary_image_id":135},3208,"Piemontite","Ca\u003Csub>2\u003C\u002Fsub>(Al\u003Csub>2\u003C\u002Fsub>Mn\u003Csup>3+\u003C\u002Fsup>)[Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>][SiO\u003Csub>4\u003C\u002Fsub>]O(OH)","(CaCa)(AlAlMn\u003Csup>3+\u003C\u002Fsup>)O[Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>][SiO\u003Csub>4\u003C\u002Fsub>](OH)",6.5,"3.46","3.45",19415,{"id":137,"name":138,"entrytype":9,"csystem":37,"ima_formula":139,"mindat_formula":140,"hmin":48,"hmax":48,"dmeas":11,"dcalc":141,"primary_image_id":11},42876,"Piemontite-(Pb)","CaPb(Al\u003Csub>2\u003C\u002Fsub>Mn\u003Csup>3+\u003C\u002Fsup>)[Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>][SiO\u003Csub>4\u003C\u002Fsub>]O(OH)","(CaPb)(AlAlMn\u003Csup>3+\u003C\u002Fsup>)O[Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>][SiO\u003Csub>4\u003C\u002Fsub>](OH)","4.282",{"id":143,"name":144,"entrytype":9,"csystem":37,"ima_formula":145,"mindat_formula":146,"hmin":48,"hmax":48,"dmeas":147,"dcalc":148,"primary_image_id":149},3773,"Piemontite-(Sr)","CaSr(Al\u003Csub>2\u003C\u002Fsub>Mn\u003Csup>3+\u003C\u002Fsup>)[Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>][SiO\u003Csub>4\u003C\u002Fsub>]O(OH)","(CaSr)(AlAlMn\u003Csup>3+\u003C\u002Fsup>)O[Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>][SiO\u003Csub>4\u003C\u002Fsub>](OH)","3.65","3.73",19422,[],[],[153],{"id":154,"txt":155,"latitude":156,"longitude":157,"country":158},3071,"Wessels Mine, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa",-27.1135346,22.8543941,"South Africa",[160,164,168,172,177],{"id":161,"year":31,"html":162,"doi":163},243330,"Armbruster, T., Gnos, E., Dixon, R., Gutzmer, J., Hejny, C., Döbelin, N., Medenbach, O. (2002) Manganvesuvianite and tweddillite, two new Mn\u003Csup>3+\u003C\u002Fsup>-silicate minerals from the Kalahari manganese fields, South Africa. \u003Ci>Mineralogical Magazine\u003C\u002Fi>,  66 (1) 137-150 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1180\u002F0026461026610018'>doi:10.1180\u002F0026461026610018\u003C\u002Fa>","10.1180\u002F0026461026610018",{"id":165,"year":166,"html":167,"doi":11},16105946,2003,"Jambor, J.L., Roberts, A.C. (2003) New mineral names. American Mineralogist: 88: 251-255.",{"id":169,"year":170,"html":171,"doi":11},16000812,2005,"Fukushima, H., Minakawa, T. & Nishio, D. (2005): Ba-rich tweddillite from the Kamisugai mine in the Sambagawa metamorphic belt, Shikoku, Japan. Ganseki Kobutsu Kagaku 34, 69-76. (in Japanese)",{"id":173,"year":174,"html":175,"doi":176},128569,2006,"Armbruster, Thomas, Bonazzi, Paola, Akasaka, Masahide, Bermanec, Vladimir, Chopin, Christian, Gieré, Reto, Heuss-Assbichler, Soraya, Liebscher, Axel, Menchetti, Silvio, Pan, Yuanming, Pasero, Marco (2006) Recommended nomenclature of epidote-group minerals. \u003Ci>European Journal of Mineralogy\u003C\u002Fi>,  18 (5) 551-567 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1127\u002F0935-1221\u002F2006\u002F0018-0551'>doi:10.1127\u002F0935-1221\u002F2006\u002F0018-0551\u003C\u002Fa>","10.1127\u002F0935-1221\u002F2006\u002F0018-0551",{"id":178,"year":179,"html":180,"doi":181},244813,2016,"Revheim, Olav, King, Vandall T. (2016) Epidote supergroup nomenclature: The names hancockite, niigataite and tweddillite reinstated. \u003Ci>Mineralogical Magazine\u003C\u002Fi>,  80 (5) 877-880 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1180\u002Fminmag.2016.080.029'>doi:10.1180\u002Fminmag.2016.080.029\u003C\u002Fa>","10.1180\u002Fminmag.2016.080.029",[183],{"id":184,"source_url":185,"license_code":186,"credit_html":187,"title":188,"description":189,"author":190,"original_width":191,"original_height":192},24809,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=73662023","CC BY-SA 4.0","David Hospital, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=73662023\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Tweddillite.jpg","Very small but sharp crystal of the extremely rare mineral tweddillite from the type locality in Wessels mine (North Cape Province, South Africa). Tweddillite is one of the rarest minerals from Wessels mine and it is very rarely seen in the systematic mineral market.","David Hospital",707,667,[194],{"id":195,"url":196,"label":197,"formula":198,"spacegroup":199,"year":31},13996,"\u002Fcif\u002F13996.cif","Armbruster 2002","Ca Sr Al1.43 Mn1.313 Fe.257 Si3 O13 H","P 1 21\u002Fm 1",[201,202,203,204,205,206],"IMA2001-014","Manganipiemontite-(Sr)","Tweddilliet","Twedillit","Twedillita","Twedillite",[208,213,219,223,226,229],{"lang":209,"names":210},"ca",[211,212],"manganipiemontita-(Sr)","tweddillita",{"lang":214,"names":215},"de",[216,217,218],"IMA 2001-014","Manganipiemontit-(Sr)","Tweddillit",{"lang":220,"names":221},"eu",[222,202,7],"Manganipiemontita-",{"lang":224,"names":225},"fr",[7],{"lang":227,"names":228},"it",[202,7],{"lang":230,"names":231},"ru",[232,233],"Манганипьемонтит-(Sr)","Тведдилит","Q3844522",{"history":11,"applications":11}]