Pilawite-(Y)
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About Pilawite-(Y)
Piława Górna, Poland
Formula:
Ca2Y2Al4(SiO4)4O2(OH)2
Colour:
White
Lustre:
Vitreous
Hardness:
5
Specific Gravity:
4.007 (Calculated)
Crystal System:
Monoclinic
Name:
Named for the town of Piława Górna, Poland, near the type locality.
Classification of Pilawite-(Y)
Pronounciation of Pilawite-(Y)
Pronounciation:
| Play | Recorded by | Country |
|---|---|---|
| Łukasz Kruszewski | Poland |
Physical Properties of Pilawite-(Y)
Vitreous
Transparency:
Translucent
Colour:
White
Streak:
White
Hardness:
5 on Mohs scale
Tenacity:
Brittle
Density:
4.007 g/cm3 (Calculated)
Optical Data of Pilawite-(Y)
Type:
Biaxial (+)
RI values:
nα = 1.743(5) nβ = 1.754(5) nγ = 1.779(5)
2V:
Measured: 65° (2), Calculated: 68°
Birefringence:
Δ = 0.03–0.04
Max Birefringence:
δ = 0.036
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
High
Pleochroism:
Non-pleochroic
Chemical Properties of Pilawite-(Y)
Formula:
Ca2Y2Al4(SiO4)4O2(OH)2
Crystallography of Pilawite-(Y)
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 8.558(3) Å, b = 7.260(3) Å, c = 11.182(6) Å
β = 90.61(4)°
β = 90.61(4)°
Ratio:
a:b:c = 1.179 : 1 : 1.54
Unit Cell V:
694.7 ų
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.921 | (38) |
| 3.044 | (100) |
| 2.791 | (43) |
| 2.651 | (46) |
| 2.583 | (54) |
| 2.485 | (62) |
| 2.408 | (45) |
| 2.147 | (42) |
Comments:
From Type Description.
Type Occurrence of Pilawite-(Y)
General Appearance of Type Material:
White crystals up to 1.5 mm in size
Place of Conservation of Type Material:
Type material is deposited in the collections of the Mineralogical Museum of the University of Wrocław, Wrocław, Poland, catalogue number MMWr IV7676
Geological Setting of Type Material:
Pegmatite
Reference:
Pieczka, A., Hawthorne, F.C., Cooper, M.A., Szełęg, E., Szuszkiewicz, A., Turniak, K., Nejbert, K., Ilnicki, S. (2015) Pilawite-(Y), Ca2(Y,Yb)2[Al4(SiO4)4O2(OH)2], a new mineral from the Piława Górna granitic pegmatite, southwestern Poland: mineralogical data, crystal structure and association. Mineralogical Magazine: 79: 1143-1157.
Synonyms of Pilawite-(Y)
Common Associates
Associated Minerals Based on Photo Data:
| Gadolinite-(Y) | 1 photo of Pilawite-(Y) associated with Gadolinite-(Y) on mindat.org. |
| Hellandite-(Y) | 1 photo of Pilawite-(Y) associated with Hellandite-(Y) on mindat.org. |
| Keiviite-(Y) | 1 photo of Pilawite-(Y) associated with Keiviite-(Y) on mindat.org. |
| Allanite-(Y) | 1 photo of Pilawite-(Y) associated with Allanite-(Y) on mindat.org. |
Other Information
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 Pilawite-(Y)
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Pieczka, A., Hawthorne, F.C., Cooper, M.A., Szełe˛g, E., Szuszkiewicz, A., Turniak, K., Nejbert, K. and Ilnicki, S.S. (2014) Pilawite, IMA 2013-125. CNMNC Newsletter No. 20, June 2014, page 551; Mineralogical Magazine: 78: 549-558.
Pieczka, A., Hawthorne, F.C., Cooper, M.A., Szełęg, E., Szuszkiewicz, A., Turniak, K., Nejbert, K., Ilnicki, S. (2015) Pilawite-(Y), Ca2(Y,Yb)2[Al4(SiO4)4O2(OH)2], a new mineral from the Piława Górna granitic pegmatite, southwestern Poland: mineralogical data, crystal structure and association. Mineralogical Magazine: 79: 1143-1157.
Internet Links for Pilawite-(Y)
mindat.org URL:
https://www.mindat.org/min-46077.html
Please feel free to link to this page.
Please feel free to link to this page.
External Links:
Mineral Dealers:
Localities for Pilawite-(Y)
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Poland (TL) | |
| Pieczka, A., Hawthorne, F.C., Ma, C., Rossman, G.R., Szełęg, E., Szuszkiewicz, A., Turniak, K., Nejbert, K., Ilnicki, S.S., Buffat, P., Rutkowski, B. (2016): Żabińskiite, ideally Ca(Al0.5Ta0.5)(SiO4)O, a new mineral of the titanite group from the Piława Górna pegmatite, the Góry Sowie Block, southwestern Poland, Mineralogical Magazine: 80: (in press; Pieczka, A., Hawthorne, F.C., Cooper, M.A., Szełe˛g, E., Szuszkiewicz, A., Turniak, K., Nejbert, K. and Ilnicki, S.S. (2014) Pilawite, IMA 2013-125. CNMNC Newsletter No. 20, June 2014, page 551; Mineralogical Magazine, 78, 549-558.; Pieczka, A., Hawthorne, F.C., Cooper, M.A., Szełęg, E., Szuszkiewicz, A., Turniak, K., Nejbert, K., Ilnicki, S. (2015): Pilawite-(Y), Ca2(Y,Yb)2[Al4(SiO4)4O2(OH)2], a new mineral from the Piława Górna granitic pegmatite, southwestern Poland: mineralogical data, crystal structure and association. Mineralogical Magazine, 79, 1143-1157. |
Sweden | |
| http://www.jachymov2016.cz/abstracts (pp. 89-92) |
Julianna pegmatite, DSS Piława Górna Quarry, Piława Górna, Dzierżoniów District, Lower Silesia, Poland