Peisleyite
A valid IMA mineral species
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About Peisleyite
Vincent Peisley
Formula:
Na2Al9[(P,S)O4]8(OH)6 · 28H2O
Colour:
White
Lustre:
Dull
Hardness:
3
Specific Gravity:
2.20
Crystal System:
Triclinic
Name:
Named by E. S. Pilkington, E. R. Segnit, and J. A. Watts in 1982 in honor of Vincent Peisley (b. 1941, died 6 May 2021), mineral collector from Brahma Lodge, Australia who collected the first specimens. It is pronounced peez'-lee-ite.
This page provides mineralogical data about Peisleyite.
Unique Identifiers
Mindat ID:
3143
Long-form identifier:
mindat:1:1:3143:7
IMA Classification of Peisleyite
Approved
IMA Formula:
Na3Al16(PO4)10(SO4)2(OH)17 · 20H2O
Approval year:
1981
First published:
1982
Classification of Peisleyite
8.DO.15
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
O : With CO3, SO4, SiO4
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
O : With CO3, SO4, SiO4
43.5.15.1
43 : COMPOUND PHOSPHATES, ETC.
5 : Hydrated Compound Phosphates, etc·, Containing Hydroxyl or Halogen
43 : COMPOUND PHOSPHATES, ETC.
5 : Hydrated Compound Phosphates, etc·, Containing Hydroxyl or Halogen
22.3.5
22 : Phosphates, Arsenates or Vanadates with other Anions
3 : Phosphates, arsenates or vanadates with sulphates
22 : Phosphates, Arsenates or Vanadates with other Anions
3 : Phosphates, arsenates or vanadates with sulphates
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 |
|---|---|---|
| Pei | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Peisleyite
Dull
Colour:
White
Streak:
White
Hardness:
3 on Mohs scale
Density:
2.20 g/cm3 (Measured) 2.23 g/cm3 (Calculated)
Optical Data of Peisleyite
Type:
Biaxial
Dispersion:
none
Comments:
average RI ~1.510
Chemistry of Peisleyite
Mindat Formula:
Na2Al9[(P,S)O4]8(OH)6 · 28H2O
Element Weights:
Crystallography of Peisleyite
Crystal System:
Triclinic
Class (H-M):
1 - Pedial
Space Group:
P1
Cell Parameters:
a = 9.280(19) Å, b = 11.976(19) Å, c = 13.250(18) Å
α = 91.3(1)°, β = 75.6(1)°, γ = 67.67(1)°
α = 91.3(1)°, β = 75.6(1)°, γ = 67.67(1)°
Ratio:
a:b:c = 0.775 : 1 : 1.106
Unit Cell V:
1,308.02 ų (Calculated from Unit Cell)
Z:
4
Morphology:
very small flakes about 2 μm in diameter
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 12.63 Å | (100) |
| 7.82 Å | (35) |
| 5.41 Å | (35) |
| 7.59 Å | (30) |
| 4.35 Å | (20) |
| 10.85 Å | (15) |
| 6.43 Å | (15) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-? alteration and/or metamorphism | |
| 31 : Thermally altered carbonate, phosphate, and iron formations | |
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47b : [Sulfates and sulfites] | |
| 47c : [Carbonates, phosphates, borates, nitrates] |
Type Occurrence of Peisleyite
General Appearance of Type Material:
White earthy material.
Place of Conservation of Type Material:
National Museum of Victoria (Cat. No. M35630).
Geological Setting of Type Material:
Phosphatic limestone beds.
Associated Minerals at Type Locality:
Synonyms of Peisleyite
Other Language Names for Peisleyite
Common Associates
Associated Minerals Based on Photo Data:
| 1 photo of Peisleyite associated with Fluorwavellite | Al3(PO4)2(OH)2F · 5H2O |
Related Minerals - Strunz-mindat Grouping
| 8.DO. | Whiterockite | CaMgMn3+3O2(PO4)2(CO3)F · 5H2O |
| 8.DO.05 | Girvasite | NaCa2Mg3(PO4)3(CO3)(H2O)6 |
| 8.DO.10 | Voggite | Na2Zr(PO4)(CO3)(OH) · 2H2O |
| 8.DO.20 | Perhamite | Ca3Al7.7Si3P4O23.5(OH)14.1 · 8H2O |
| 8.DO.20 | Krásnoite | Ca3Al7.7Si3P4O23.5(OH)12.1F2 · 8H2O |
| 8.DO.25 | Saryarkite-(Y) | Ca(Y,Th)Al5(SiO4)2(PO4,SO4)2(OH)7 · 6H2O |
| 8.DO.30 | Micheelsenite | (Ca2Y)Al(PO3OH)(CO3)(OH)6 · 12H2O |
| 8.DO.40 | Parwanite | (Na,K)(Mg,Ca)4Al8(PO4)8(CO3)(OH)7 · 30H2O |
| 8.DO.45 | Skorpionite | Ca3Zn2(PO4)2(CO3)(OH)2 · H2O |
| 8.DO.50 | Jörgkellerite | (Na,◻)3Mn3+3(PO4)2(CO3)(O,OH)2 · 5H2O |
| 8.DO.55 | Juansilvaite | Na5Al3[AsO3(OH)]4[AsO2(OH)2]2(SO4)2 · 4H2O |
| 8.DO.60 | Vanderheydenite | Zn6(PO4)2(SO4)(OH)4 · 7H2O |
Other Information
Notes:
Soluble in mineral acids.
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 Peisleyite
mindat.org URL:
https://www.mindat.org/min-3143.html
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External Links:
References for Peisleyite
Localities for Peisleyite
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.
Australia (TL) | |
| Pilkington et al. (1982) |
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Tom's Quarry, Koonunga, Light Regional Council, South Australia, Australia