Caysichite-(Y) (original) (raw)
A valid IMA mineral species
About Caysichite-(Y)Hide
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Formula:
(Ca,Yb,Er)4Y4(Si8O20)(CO3)6(OH) · 7H2O
Previously given as Ca2Y2Si4O10(CO3)3 · 4H2O.
Colour:
Colourless, white, pale yellow, rarely greenish
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).
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:922:9
1e4f9141-4b32-44ec-b4df-c5b78b9590c0
IMA Classification of Caysichite-(Y)Hide
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Type description reference:
Classification of Caysichite-(Y)Hide
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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
Mineral SymbolsHide
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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference |
|---|---|---|
| Cay-Y | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Cay | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Physical Properties of Caysichite-(Y)Hide
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Transparency:
Transparent, Translucent
Colour:
Colourless, white, pale yellow, rarely greenish
Density:
3.03 g/cm3 (Measured) 3.029 g/cm3 (Calculated)
Optical Data of Caysichite-(Y)Hide
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RI values:
_n_α = 1.586 - 1.589 _n_β = 1.614 - 1.616 _n_γ = 1.621 - 1.626
2V:
Measured: 61° , Calculated: 52° to 60°
δ = 0.035 - 0.037
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Optical Extinction:
X = b; Y = a; Z = c.
Chemistry of Caysichite-(Y)Hide
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Mindat Formula:
(Ca,Yb,Er)4Y4(Si8O20)(CO3)6(OH) · 7H2O
Previously given as Ca2Y2Si4O10(CO3)3 · 4H2O.
Crystallography of Caysichite-(Y)Hide
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Crystal System:
Orthorhombic
Class (H-M):
m _m_2 - 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)
Comment:
Non-standard space-group setting Ccm21.
Crystal StructureHide
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| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0005150 | Caysichite-(Y) | Mellini M, Merlino S (1978) Caysichite: A double crankshaft chain structure The Canadian Mineralogist 16 81-88 |  |
1978 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 6.93 Å | (100) |
| 3.321 Å | (90) |
| 4.38 Å | (60) |
| 4.22 Å | (60) |
| 3.481 Å | (60) |
| 4.87 Å | (40) |
| 2.323 Å | (40) |
Comments:
Evans-Lou quarry, Quebec, Canada. Data from the type description.
Geological EnvironmentHide
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Type Occurrence of Caysichite-(Y)Hide
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General Appearance of Type Material:
Coating on fractures or as incrustations with a divergent columnar structure. Rare terminated crystals.
Place of Conservation of Type Material:
Canadian Museum of Nature, Ottawa, Ontario, Canada.
Canadian Geological Survey, Ottawa, Canada, 10402.
The Natural History Museum, London, England, 1977,278.
Geological Setting of Type Material:
Associated Minerals at Type Locality:
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
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Other Language Names for Caysichite-(Y)Hide
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Common AssociatesHide
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Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat GroupingHide
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| 9.DJ.05 | Narsarsukite | Na2(Ti,Fe3+)Si4(O,F)11 | Tet. 4/m : _I_4/m |
|---|---|---|---|
| 9.DJ.10 | Laplandite-(Ce) | Na4CeTiPO4Si7O18 · 5H2O | Orth. m m m _(_2/_m_2/_m_2/m ) : P m m m |
| 9.DJ.20 | Seidite-(Ce) | Na4(Ce,Sr)2[TiSi8O18(OH)2](O,OH,F)4 · 5H2O | Mon. 2/m : _B_2/b |
| 9.DJ.25 | Carlosturanite | (Mg,Fe,Ti)21(Si,Al)12O28(OH)34 · H2O | Mon. m : B m |
| 9.DJ.30 | Jonesite | Ba4(K,Na)2Ti4Al2(Si3O9)2(SiO4)4O2 · 6H2O | Mon. 2/m : _P_2/m |
Fluorescence of Caysichite-(Y)Hide
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Not fluorescent in LW or SW UV.
Other InformationHide
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Notes:
Faint green cathodoluminescence.
Effervesces slowly in cold, dilute HCl.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Caysichite-(Y)Hide
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References for Caysichite-(Y)Hide
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Reference List:
Fleischer, Michael, Pabst, Adolf, Mandarino, Joseph A., Chao, George Y., Cabri, Louis, J. (1976) New Mineral Names. American Mineralogist, 61 (1-2) 174-186
Localities for Caysichite-(Y)Hide
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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
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- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and 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 (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
| Australia | |
|---|---|
| South Australia District Council of Peterborough Paratoo ⓘ Paratoo copper Mine | |
| Canada (TL) | |
| Québec Outaouais Les Collines-de-l'Outaouais RCM Val-des-Monts Saint-Pierre-de-Wakefield Lake Saint-Pierre ⓘ Evans-Lou Mine (TL) | Hogarth et al. (1974) |
| Czech Republic | |
| Vysočina Region Havlíčkův Brod District Pohled ⓘ Granite quarry ? | Dolníček et al. (2024) |
| Germany | |
| Bavaria Lower Bavaria Freyung-Grafenau District Röhrnbach ⓘ Steinerleinbach Quarry | Habel (2009) |
| Italy | |
| Liguria Savona Province Sassello ⓘ Veirera | Palenzona A. et al. (Y) |
| ⓘ Rio Stogia | Palenzona et al. (2004) +1 other reference |
| Japan | |
| Fukushima Prefecture Date District Kawamata Iizaka Village (Iisaka) ⓘ Suishoyama pegmatite (Suishouyama; Suisyoyama; Suishyoyama) | Yamada et al. (2004) |
| Malawi | |
| Southern Region Zomba ⓘ Mount Malosa |
Massanek (1999) +1 other reference |
| Norway | |
| Telemark Kragerø Lindvikskollen-Kalstadgangen pegmatite ⓘ Lindvikskollen Quarry | Kristiansen (1993) |
| Russia | |
| Murmansk Oblast Lovozersky District Keivy Mountains Western Keivy Massif ⓘ Ploskaya Mt | Voloshin A.V. et al. (1986) +1 other reference |
| West Keivy Block ⓘ Rovgora Mountain (Rov-gora) | Pekov et al. (2008) |