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Caysichite-(Y)

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About Caysichite-(Y)Hide

Formula:
Ca2Y2Si4O10(CO3)3 · 4H2O
Colour:
Colourless, white, pale yellow, rarely greenish
Lustre:
Vitreous
Hardness:
Crystal System:
Orthorhombic
Name:
Named for the composition that includes CAlcium, Yttrium, SIlicon, Carbon, and Hydrogen. The suffix was added in 1987 and denotes the dominant rare earth element. The pronunciation is kā-sichaite.
This page provides mineralogical data about Caysichite-(Y).


Classification of Caysichite-(Y)Hide

Approved
First Published:
1974
9.DJ.15

9 : SILICATES (Germanates)
D : Inosilicates
J : Inosilicates with 4-periodic double and triple chains
70.1.2.2

70 : INOSILICATES Column or Tube Structures
1 : Column or Tube Structures with columnar silicate units
17.4.11

17 : Silicates Containing other Anions
4 : Silicates with carbonates

Physical Properties of Caysichite-(Y)Hide

Vitreous
Transparency:
Transparent, Translucent
Colour:
Colourless, white, pale yellow, rarely greenish
Streak:
White
Hardness:
4½ on Mohs scale

Optical Data of Caysichite-(Y)Hide

Type:
Biaxial (-)
RI values:
nα = 1.586 - 1.589 nβ = 1.614 - 1.616 nγ = 1.621 - 1.626
2V:
Measured: 61° , Calculated: 52° to 60°
Max Birefringence:
δ = 0.035 - 0.037
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r > v

Chemical Properties of Caysichite-(Y)Hide

Formula:
Ca2Y2Si4O10(CO3)3 · 4H2O
IMA Formula:
(Ca,Yb,Er)4Y4(Si8O20)(CO3)6(OH) · 7H2O

Crystallography of Caysichite-(Y)Hide

Crystal System:
Orthorhombic
Class (H-M):
mm2 - Pyramidal
Cell Parameters:
a = 13.282(3) Å, b = 13.925(3) Å, c = 9.724(4) Å
Ratio:
a:b:c = 0.954 : 1 : 0.698
Unit Cell V:
1,798.47 ų (Calculated from Unit Cell)
Z:
4
Comment:
Non-standard space-group setting Ccm21.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0005150Caysichite-(Y)Mellini M, Merlino S (1978) Caysichite: A double crankshaft chain structure The Canadian Mineralogist 16 81-8819780293
CIF Raw Data - click here to close

Type Occurrence of Caysichite-(Y)Hide

General Appearance of Type Material:
Coating on fractures or as incrustations with a divergent columnar structure. Crystals rare.
Place of Conservation of Type Material:
Canadian Museum of Nature, Ottawa.
Canadian Geological Survey, Ottawa, Canada, 10402.
The Natural History Museum, London, England, 1977,278.
Geological Setting of Type Material:
Granite pegmatite
Reference:
Hogarth, D.D., Chao, G.Y., Plant. G.A., Steacy, H. R. (1974) Caysichite, a new silico-carbonate of yttrium and calcium. Canadian Mineralogist: 12: 293-298.

Synonyms of Caysichite-(Y)Hide

Other Language Names for Caysichite-(Y)Hide

Simplified Chinese:碳硅钙钇石
Traditional Chinese:碳矽鈣釔石

Common AssociatesHide

Associated Minerals Based on Photo Data:
4 photos of Caysichite-(Y) associated with QuartzSiO2
3 photos of Caysichite-(Y) associated with Yttrofluorite(Ca1-xYx)F2+x where 0.05< x

Related Minerals - Nickel-Strunz GroupingHide

9.DJ.05NarsarsukiteNa4(Ti,Fe)2[Si8O20](O,OH,F)2Tet.
9.DJ.10Laplandite-(Ce)Na4CeTiPO4Si7O18 · 5H2OOrth. mmm (2/m 2/m 2/m) : Pmmm
9.DJ.20Seidite-(Ce)Na4(Ce,Sr)2[TiSi8O18(OH)2](O,OH,F)4 · 5H2OMon.
9.DJ.25Carlosturanite(Mg,Fe,Ti)21(Si,Al)12O28(OH)34 · H2OMon. m : Bm
9.DJ.30JonesiteBa4(K,Na)2Ti4Al2(Si3O9)2(SiO4)4O2 · 6H2OOrth.

Related Minerals - Dana Grouping (8th Ed.)Hide

70.1.2.1NarsarsukiteNa4(Ti,Fe)2[Si8O20](O,OH,F)2Tet.
70.1.2.3Charoite(K,Sr)15-16(Ca,Na)32[Si6O11(O,OH)6]2[Si12O18(O,OH)12]2[Si17O25(O,OH)18]2(OH,F)4 · ~3H2OMon. 2/m : P21/m

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

17.4.1TilleyiteCa5(Si2O7)(CO3)2Mon.
17.4.2SpurriteCa5(SiO4)2(CO3)Mon.
17.4.3ParaspurriteCa5(SiO4)2(CO3)Mon.
17.4.4ScawtiteCa7(Si3O9)2CO3 · 2H2OMon. 2/m
17.4.5FukaliteCa4[Si2O6][CO3](OH)2Mon. 2/m : P21/b
17.4.6MeioniteCa4Al6Si6O24CO3Tet. 4/m : I4/m
17.4.7Cancrinite(Na,Ca,◻)8(Al6Si6O24)(CO3,SO4)2 · 2H2OHex. 6 : P63
17.4.8CarletoniteKNa4Ca4Si8O18(CO3)4(OH,F) · H2OTet. 4/mmm (4/m 2/m 2/m) : P4/mbm
17.4.9Iimoriite-(Y)Y2[SiO4][CO3]Tric.
17.4.10Kainosite-(Y)Ca2(Y,Ce)2(Si4O12)(CO3) · H2OOrth. mmm (2/m 2/m 2/m)
17.4.12Lepersonnite-(Gd)Ca(Gd,Dy)2(UO2)24(SiO4)4(CO3)8(OH)24 · 48H2OOrth.
17.4.13AshburtonitePb4Cu4(Si4O12)(HCO3)4(OH)3Cl · H2OTet.
17.4.14Surite(Pb,Ca)3(Al,Fe2+,Mg)2((Si,Al)4O10)(CO3)2(OH)2Mon.
17.4.15Tundrite-(Ce)Na2Ce2Ti(SiO4)(CO3)2O2Tric. 1 : P1
17.4.16Tundrite-(Nd)Na2(Nd,Ce)2Ti(SiO4)(CO3)2O2

Fluorescence of Caysichite-(Y)Hide

Not fluorescent in LW or SW UV

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Caysichite-(Y)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Hogarth, D.D., Chao, G.Y., Plant. G.A., Steacy, H. R. (1974) Caysichite, a new silico-carbonate of yttrium and calcium. Canadian Mineralogist: 12: 293-298.
Fleischer, M., Pabst, A., Mandarino, J.A., Chao, G.Y., Cabri, L.J. (1976) New mineral names. American Mineralogist: 61: 174-186.
Mellini, M., Merlino, S. (1978) Caysichite: a double crankshaft chain structure. Canadian Mineralogist: 16: 81-88.
Nickel, E.H., Mandarino, J.A. (1987) Procedures involving the IMA Commission on New Minerals and Mineral Names and guidelines on mineral nomenclature. American Mineralogist: 72: 1031-1042.

Internet Links for Caysichite-(Y)Hide

Localities for Caysichite-(Y)Hide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Australia
 
  • South Australia
    • Olary Province
      • Yunta
Canada (TL)
 
  • Québec
    • Outaouais
      • Les Collines-de-l'Outaouais RCM
        • Val-des-Monts
          • Lac Saint-Pierre (Wakefield Lake)
Hogarth, D.D., Chao, G.Y., Plant. G.A. & Steacy, H. R. (1974): Caysichite, a new silico-carbonate of yttrium and calcium. Canadian Mineralogist.12: 293-298
Germany
 
  • Bavaria
    • Lower Bavaria
      • Freyung-Grafenau District
        • Röhrnbach
Habel, M. (2009): Der Granodioritbruch der Fa. Josef Uhrmann OHG, Steinerleinbach bei Röhrnbach. Mineralien-Welt 20 (2), 66-86.
Italy
 
  • Liguria
    • Savona Province
      • Sassello
Palenzona A., Martinelli A., Pani M., Selmi P., 2004. La caysichite-(Y) di Veirera (Gruppo di Voltri, Liguria centrale). Riv. Mineral. Ital., 28, 4: 253-255
Palenzona, A., Martinelli, A., Pani, M., Selmi, P. (2004): La caysichite-(Y) di Veirera (Gruppo di Voltri, Liguria centrale). Riv. Mineral. Ital., 28, 4 (4-2004), 253-255; Martinelli, A. (2013): Segnalazioni in breve. Novità e conferme da Veirera. Prie, 9, 26.
Japan
 
  • Fukushima Prefecture
    • Date District
      • Kawamata
        • Iizaka Village (Iisaka)
Yamada et al. (2004) [cited in Hori et al. (2006): Iwashiroite-(Y), YTaO4, a new mineral from Suishoyama, Kawamata Town, Fukushima Prefecture, Japan. Journal of Mineralogical and Petrological Sciences, 101, 170-177.]
Malawi
 
  • Southern Region
    • Zomba
Massanek, A. (1999): Neu aus Malawi: Caysichit-(Y), Lapis 24 (4),33; Cairncross, B. (2002). Aegirine and Associated Minerals from Mount Malosa, Malawi. Rocks & Minerals, 77(1), 31-37.
Norway
 
  • Telemark
    • Kragerø
      • Lindvikskollen-Kalstadgangen pegmatite
Kristiansen, Roy (1993): Caysichitt-(Y) og Chernovitt-(Y) fra Lindvikskollen, Kragerø; to nye mineraler for Norge. STEIN 20 (2), 125-128
Russia
 
  • Murmansk Oblast
    • Lovozersky District
      • Keivy Mountains
        • Western Keivy Massif
Voloshin A.V., Pakhomovskii Ya.A. [Волошин А. В., Пахомовский Я. А.] (1986): Minerals and evolution of mineral formation in amazonite pegmatites of the Kola Peninsula [Минералы и эволюция минералообразования в амазонитовых пегматитах Кольского полуострова]. Nauka, Leningrad, 168 pp. (in Russian); Voloshin A.V., Pakhomovskii Ya.A., Zezulina E.P. [Волошин А.В., Пахомовский Я.А., Зезулина Е.П.] (1986): Caysichite from amazonite pegmatites of the Kola Peninsula [Кайсикхит из амазонитовых пегматитов Кольского полуострова]. Min. Zhurnal [Мин. Журнал], 8, 90-93 (in Russian).
 
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