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Cancrinite information


Cancrinite
Cancrinite
General
CategoryFeldspathoid
Formula
(repeating unit)		Na6Ca2[(CO3)2|Al6Si6O24]·2H2O
IMA symbolCcn[1]
Strunz classification9.FB.05
Crystal systemHexagonal
Crystal classPyramidal (6)
(same H-M symbol)
Space groupP63
Unit cella = 12.67(9) Å,
c = 5.15(4) Å; Z= 1
Identification
ColorGrey-green, white, yellow, blue, orange, reddish
Crystal habitRare as prismatic crystals; typically massive
TwinningRare – lamellar
CleavagePerfect on {1010}, poor on {0001}
FractureIrregular/uneven
TenacityBrittle
Mohs scale hardness5–6
LusterVitreous, greasy, pearly
StreakWhite
DiaphaneityTransparent, translucent
Specific gravity2.42 – 2.51
Optical propertiesUniaxial (+/−)
Refractive indexnω = 1.507 – 1.528 nε = 1.495 – 1.503
Birefringenceδ = 0.012 – 0.025
References[2][3][4]

Cancrinite is a complex carbonate and silicate of sodium, calcium and aluminium with the formula Na6Ca2[(CO3)2|Al6Si6O24]·2H2O. It is classed as a member of the feldspathoid group of minerals; the alkali feldspars that are poor in silica. Yellow, orange, pink, white or even blue, it has a vitreous or pearly luster; a hardness of 5–6 and an uneven conchoidal fracture. It is unusual among the silicate minerals in that it will effervesce with hydrochloric acid due to the associated carbonate ions.

Found originally in 1839 in the Ural Mountains, it is named after Georg von Cancrin, a Russian minister of finance.[2]

  1. ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
  2. ^ a b Cancrinite on Mindat.org
  3. ^ Cancrinite data on Webmineral
  4. ^ Handbook of Mineralogy

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Cancrinite

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Cancrinite is a complex carbonate and silicate of sodium, calcium and aluminium with the formula Na6Ca2[(CO3)2|Al6Si6O24]·2H2O. It is classed as a member...

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Nepheline syenite

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titanite, iron oxides, apatite, fluorite, melanite garnet, and zircon. Cancrinite occurs in several nepheline-syenites. A great number of interesting and...

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Afghanite

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carbonate alumino-silicate mineral. Afghanite is a feldspathoid of the cancrinite group and typically occurs with sodalite group minerals. It forms blue...

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Silicate mineral

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CaAl2Si2O8 Tectosilicates, feldspathoid family Nosean – Na8Al6Si6O24(SO4) Cancrinite –Na6Ca2(CO3,Al6Si6O24) · 2 H2O Leucite – KAlSi2O6 Nepheline – (Na,K)AlSiO4...

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Feldspathoid

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rocks. Afghanite – Tectosilicate mineral Analcime – Tectosilicate mineral Cancrinite – Feldspathoid mineral Kalsilite – Vitreous white to grey feldspathoidal...

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List of minerals

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Calderite Caledonite Calomel Calumetite Campigliaite Canasite Canavesite Cancrinite Canfieldite Carletonite Carlosruizite Carlsbergite Carminite Carnallite...

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Sodalite

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minerals typical of silica-undersaturated environments, namely leucite, cancrinite and natrolite. Other associated minerals include nepheline, titanian andradite...

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Ijolite

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surrounded by formless areas of nepheline. The accessory minerals are apatite, cancrinite, calcite, titanite and schorlomite, a dark-brown titaniferous variety...

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List of gemstones by species

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Bustamite Bytownite Calcite Manganoan calcite (var.) Caledonite Canasite Cancrinite Vishnevite Carletonite Carnallite Cassiterite Catapleiite Cavansite Celestite...

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Red mud

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formula Percentage composition Sodalite 3Na2O⋅3Al2O3⋅6SiO2⋅Na2SO4 4–40% Cancrinite Na3⋅CaAl3⋅Si3⋅O12CO3 0–20% Aluminous-goethite (aluminous iron oxide) α-(Fe...

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Farneseite

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Farneseite is a mineral from the cancrinite sodalite group with 14 layer stacking. It is a complex silicate mineral with formula (Na,Ca,K)56(Al6Si6O24)7(SO4)12·6H2O...

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Zeolite

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zeolite family (IDs 9.G) Other feldspathoids: nephelines (IDs 9.FA.05) Cancrinite-sodalite groups (IDs 9.FB.) Other tectosilicates (IDs 9.FA. and 9.FB.15...

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Mineral group

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Amphibole group Aragonite group Arsenic minerals Blodite group Calcite group Cancrinite group Clay minerals group Descloizite group Dolomite group Epidote group...

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Oilfield scale inhibition

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Boehmite, gibbsite, diaspore, corundum Aluminosilicates AlxSiyOz Analcite, cancrinite, noselite Copper Cu Metallic copper, cuprite (Cu2O), tenorite (Cu ) Magnetite...

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Hexagonal crystal family

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168–173 Hexagonal pyramidal 6 C6 66 [6]+ enantiomorphic polar nepheline, cancrinite P6, P61, P65, P62, P64, P63 174 Trigonal dipyramidal 6 C3h 3* [2,3+] cesanite...

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Carbonate mineral

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zeolite family (IDs 9.G) Other feldspathoids: nephelines (IDs 9.FA.05) Cancrinite-sodalite groups (IDs 9.FB.) Other tectosilicates (IDs 9.FA. and 9.FB.15...

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Sulfide mineral

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zeolite family (IDs 9.G) Other feldspathoids: nephelines (IDs 9.FA.05) Cancrinite-sodalite groups (IDs 9.FB.) Other tectosilicates (IDs 9.FA. and 9.FB.15...

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Litchfieldite

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feldspar (mostly albite but also some microcline), with nepheline, sodalite, cancrinite and calcite. The mafic minerals, when present, are magnetite and an iron-rich...

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List of mineral symbols

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Canavesite Cnv Chabournéite Chb Chromium Cr Compreignacite Cgn Cyprine Cyp Cancrinite Ccn Chadwickite Cdw Chromium-dravite Cdrv Congolite Cgl Cyrilovite Cyr...

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List of World Heritage Sites in Russia

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of which were first discovered here. They include ilmenite, monazite, cancrinite, and samarskite-(Y). The area is protected as Ilmen Nature Reserve and...

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Bystrite

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with the formula (Na,K)7Ca(Si6Al6)O24S4.5•(H2O), and a member of the cancrinite mineral group. It is a hexagonal crystal, with a 3m point group. The mineral...

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Native element mineral

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zeolite family (IDs 9.G) Other feldspathoids: nephelines (IDs 9.FA.05) Cancrinite-sodalite groups (IDs 9.FB.) Other tectosilicates (IDs 9.FA. and 9.FB.15...

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Georg Ludwig Cancrin

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Russian platinum in coinage. Humboldt recommended against it. In 1839 cancrinite, named after the Minister of Finance, was found in the Ural Mountains...

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List of minerals recognized by the International Mineralogical Association

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zeolite family (IDs 9.G) Other feldspathoids: nephelines (IDs 9.FA.05) Cancrinite-sodalite groups (IDs 9.FB.) Other tectosilicates (IDs 9.FA. and 9.FB.15...

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Borate mineral

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zeolite family (IDs 9.G) Other feldspathoids: nephelines (IDs 9.FA.05) Cancrinite-sodalite groups (IDs 9.FB.) Other tectosilicates (IDs 9.FA. and 9.FB.15...

Word Count : 947

Phosphate mineral

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zeolite family (IDs 9.G) Other feldspathoids: nephelines (IDs 9.FA.05) Cancrinite-sodalite groups (IDs 9.FB.) Other tectosilicates (IDs 9.FA. and 9.FB.15...

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Franz Ludwig von Cancrin

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Humboldt during his 1829 scientific expedition to Russia. The mineral of cancrinite is named after him. Praktische Abhandlung von der Zubereitung der Kupfererze...

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