Pilawite-(Y)
A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
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.
Unique Identifiers
Mindat ID:
46077
Long-form identifier:
mindat:1:1:46077:6
GUID
(UUID V4):
(UUID V4):
251bdbf3-7faf-4c77-bd70-8e1e2187891c
IMA Classification of Pilawite-(Y)
Approved
Approval year:
2013
First published:
2015
Type description reference:
Pieczka, Adam, Hawthorne, Frank C., Cooper, Mark A., Szełęg, Eligiusz, Szuszkiewicz, Adam, Turniak, Krzysztof, Nejbert, Krzysztof, Ilnicki, Sławomir (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 (5) 1143-1157 doi:10.1180/minmag.2015.079.5.09
Classification of Pilawite-(Y)
9.AF.95
9 : SILICATES (Germanates)
A : Nesosilicates
F : Nesosilicates with additional anions; cations in [4], [5] and/or only [6] coordination
9 : SILICATES (Germanates)
A : Nesosilicates
F : Nesosilicates with additional anions; cations in [4], [5] and/or only [6] coordination
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Plw-Y | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Pronunciation of Pilawite-(Y)
Pronunciation:
| 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
Cleavage:
None Observed
Parting:
None observed
Fracture:
Irregular/Uneven
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
Optical Extinction:
X ∧ a = 87.5° (β acute), Y // b, and Z ∧ a = 3.1° (β obtuse).
Pleochroism:
Non-pleochroic
Chemistry of Pilawite-(Y)
Mindat 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 Å | (38) |
| 3.044 Å | (100) |
| 2.791 Å | (43) |
| 2.651 Å | (46) |
| 2.583 Å | (54) |
| 2.485 Å | (62) |
| 2.408 Å | (45) |
| 2.147 Å | (42) |
Comments:
From Type Description.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 34 : Complex granite pegmatites |
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:
Granitic pegmatite. Weakly-fractionated NYF-affiliated dyke.
Associated Minerals at Type Locality:
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:
| 1 photo of Pilawite-(Y) associated with Gadolinite-(Y) | Y2Fe2+Be2Si2O10 |
| 1 photo of Pilawite-(Y) associated with Hellandite-(Y) | (Ca,REE)4Y2Al◻2(B4Si4O22) (OH)2 |
| 1 photo of Pilawite-(Y) associated with Keiviite-(Y) | Y2Si2O7 |
| 1 photo of Pilawite-(Y) associated with Allanite-(Y) | (CaY)(AlAlFe2+)O[Si2O7][SiO4](OH) |
Related Minerals - Strunz-mindat Grouping
| 9.AF. | Chegemite | Ca7(SiO4)3(OH)2 |
| 9.AF. | Barwoodite | Mn2+6Nb5+(SiO4)2O3(OH)3 |
| 9.AF. | Jingwenite-(Y) | YAlV4+(SiO4)O2(OH)2 |
| 9.AF.05 | Sillimanite | Al2(SiO4)O |
| 9.AF.05 | Xenolite | Al10Si8O31 |
| 9.AF.10 | Andalusite | Al2(SiO4)O |
| 9.AF.10 | Kanonaite | Mn3+Al(SiO4)O |
| 9.AF.15 | Kyanite | Al2(SiO4)O |
| 9.AF.20 | Mullite | Al4+2xSi2-2xO10-x |
| 9.AF.20 | Krieselite | Al2(GeO4)F2 |
| 9.AF.23 | Boromullite | Al9BSi2O19 |
| 9.AF.25 | Yoderite | Mg(Al,Fe3+)3(SiO4)2O(OH) |
| 9.AF.30 | Magnesiostaurolite | Mg(Mg,Li)3(Al,Mg)18Si8O44(OH)4 |
| 9.AF.30 | Staurolite | Fe2+2Al9Si4O23(OH) |
| 9.AF.30 | Zincostaurolite | Zn2Al9Si4O23(OH) |
| 9.AF.35 | Topaz | Al2(SiO4)(F,OH)2 |
| 9.AF.40 | Norbergite | Mg3(SiO4)F2 |
| 9.AF.45 | Alleghanyite | Mn2+5(SiO4)2(OH)2 |
| 9.AF.45 | Chondrodite | Mg5(SiO4)2F2 |
| 9.AF.45 | Reinhardbraunsite | Ca5(SiO4)2(OH,F)2 |
| 9.AF.45 | Kumtyubeite | Ca5(SiO4)2F2 |
| 9.AF.45 | Hydroxylchondrodite | Mg5(SiO4)2(OH)2 |
| 9.AF.50 | Humite | Mg7(SiO4)3F2 |
| 9.AF.50 | Manganhumite | (Mn2+,Mg)7(SiO4)3(OH)2 |
| 9.AF.50 | Unnamed (Ca-analogue of Humite) | Ca7(SiO4)4F2 |
| 9.AF.50 | Fluorchegemite | Ca7(SiO4)3F2 |
| 9.AF.50 | Unnamed (OH-analogue of humite) | Mg7(SiO4)3(OH)2 |
| 9.AF.55 | Clinohumite | Mg9(SiO4)4F2 |
| 9.AF.55 | Sonolite | Mn2+9(SiO4)4(OH)2 |
| 9.AF.55 | Hydroxylclinohumite | Mg9(SiO4)4(OH)2 |
| 9.AF.60 | Leucophoenicite | Mn2+7(SiO4)3(OH)2 |
| 9.AF.65 | Ribbeite | Mn2+5(SiO4)2(OH)2 |
| 9.AF.70 | Jerrygibbsite | Mn2+9(SiO4)4(OH)2 |
| 9.AF.75 | Franciscanite | Mn2+6(V5+,◻)2(SiO4)2(O,OH)6 |
| 9.AF.75 | Örebroite | Mn2+3(Sb5+,Fe3+)(SiO4)(O,OH)3 |
| 9.AF.75 | Welinite | Mn2+6(W6+,Mg)2(SiO4)2(O,OH)6 |
| 9.AF.75 | Scorticoite | Mn6(Sb,◻)Σ2(SiO4)2O3(OH)3 |
| 9.AF.80 | Ellenbergerite | Mg6(Mg,Ti,Zr,◻)2(Al,Mg)6Si8O28(OH)10 |
| 9.AF.85 | Chloritoid | (Fe2+,Mg,Mn2+)Al2(SiO4)O(OH)2 |
| 9.AF.85 | Magnesiochloritoid | MgAl2(SiO4)O(OH)2 |
| 9.AF.85 | Ottrélite | (Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2 |
| 9.AF.90 | Poldervaartite | CaCa[SiO3(OH)](OH) |
| 9.AF.90 | Olmiite | CaMn2+[SiO3(OH)](OH) |
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.
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.
Search Engines:
External Links:
Mineral Dealers:
References for Pilawite-(Y)
Reference List:
Williams, P. A., Hatert, F., Pasero, M., Mills, S. J. (2014) New minerals and nomenclature modifications approved in 2014, CNMNC Newsletter No 20. Mineralogical Magazine, 78 (3) 549-558 doi:10.1180/minmag.2014.078.3.05
Pieczka, Adam, Hawthorne, Frank C., Cooper, Mark A., Szełęg, Eligiusz, Szuszkiewicz, Adam, Turniak, Krzysztof, Nejbert, Krzysztof, Ilnicki, Sławomir (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 (5) 1143-1157 doi:10.1180/minmag.2015.079.5.09
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 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).
All localities listed without proper references should be considered as questionable.
Poland (TL) | |
| Williams et al. (2014) +4 other references |
Sweden | |
| - (n.d.) |
Quick NavTopAbout Pilawite-(Y)Unique IdentifiersIMA Classification Classification Mineral SymbolsPronunciation Physical Properties Optical Data Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Julianna pegmatite, DSS Piława Górna Quarry, Piława Górna, Dzierżoniów County, Lower Silesian Voivodeship, Poland