Petersite-(La)
A valid IMA mineral species
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About Petersite-(La)
Formula:
Cu6La(PO4)3(OH)6 · 3H2O
Colour:
yellowish green
Lustre:
Silky
Hardness:
3
Specific Gravity:
3.33 (Calculated)
Crystal System:
Hexagonal
Member of:
Name:
For being the La analogue of petersite-(Ce) and -(Y).
Unique Identifiers
Mindat ID:
52654
Long-form identifier:
mindat:1:1:52654:0
GUID
(UUID V4):
(UUID V4):
0d620688-e2d1-4bbe-afc5-82846aac3600
IMA Classification of Petersite-(La)
Approved
Approval year:
2017
First published:
2020
Approval history:
IMA No. 2017-089
Type description reference:
Nishio–Hamane, Daisuke, Ohnishi, Masayuki, Shimobayashi, Norimasa, Momma, Koichi, Miyawaki, Ritsuro, Inaba, Sachio (2020) Petersite–(La), a new mixite–group mineral from Ohgurusu, Kiwa, Kumano City, Mie Prefecture, Japan. Journal of Mineralogical and Petrological Sciences, 115 (3) 286-295 doi:10.2465/jmps.191211b
Classification of Petersite-(La)
8.DL.15
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
L : With large and medium-sized cations, (OH, etc.):RO4 = 2:1
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
L : With large and medium-sized cations, (OH, etc.):RO4 = 2:1
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 |
|---|---|---|
| Pts-La | 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 Petersite-(La)
Silky
Colour:
yellowish green
Hardness:
3 on Mohs scale
Comment:
Assumed, based on other mixite-group minerals
Tenacity:
Brittle
Cleavage:
None Observed
Parting:
None observed
Fracture:
Irregular/Uneven
Density:
3.33 g/cm3 (Calculated)
Comment:
Calculated based on the empirical formula and powder X–ray diffraction
Optical Data of Petersite-(La)
Type:
Uniaxial (+)
RI values:
nω = 1.680(3) nε = 1.767(3)
Max Birefringence:
δ = 0.087
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:
Visible
Comments:
light green to yellowish green
Chemistry of Petersite-(La)
Mindat Formula:
Cu6La(PO4)3(OH)6 · 3H2O
Crystallography of Petersite-(La)
Crystal System:
Hexagonal
Class (H-M):
6/m - Dipyramidal
Space Group:
P63/m
Setting:
P63/m
Cell Parameters:
a = 13.410(5) Å, c = 5.881(4) Å
Ratio:
a:c = 1 : 0.439
Unit Cell V:
915.88 ų (Calculated from Unit Cell)
Morphology:
Elongated along [001] and the prismatic face is probably formed by {001} and {100} or {110}
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 11.621 Å | (100) |
| 4.393 Å | (36) |
| 3.519 Å | (29) |
| 3.344 Å | (15) |
| 2.907 Å | (21) |
| 2.693 Å | (14) |
| 2.534 Å | (14) |
| 2.444 Å | (73) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47c : [Carbonates, phosphates, borates, nitrates] |
Type Occurrence of Petersite-(La)
General Appearance of Type Material:
radial aggregate of acicular to columnar crystals, elongated along [001] and with prismatic faces likely being formed by {001} and {100} or {110}
Place of Conservation of Type Material:
Mineralogical collections of the National Museum of Nature and Science, Tsukuba, Ibaraki 305-0005, Japan, specimen number NSM-M45621 (cotypes)
Geological Setting of Type Material:
quartz veins with cavities lined by chrysocolla
Associated Minerals at Type Locality:
Reference:
Nishio-Hamane, D., Ohnishi, M., Shimobayashi, N., Momma, K., Miyawaki, R., Inaba, S. (2020) Petersite-(La), a new mixite-group mineral from Ohgurusu, Kiwa, Kumano City, Mie Prefecture, Japan. Journal of Mineralogical and Petrological Sciences: 115(3): 286-295.
Synonyms of Petersite-(La)
Petersite (in part)
Other Language Names for Petersite-(La)
Relationship of Petersite-(La) to other Species
Member of:
Other Members of this group:
| Agardite-(Ce) | CeCu6(AsO4)3(OH)6 · 3H2O | Hex. 6/m : P63/m |
| Agardite-(La) | LaCu6(AsO4)3(OH)6 · 3H2O | Hex. 6/m : P63/m |
| Agardite-(Nd) | NdCu6(AsO4)3(OH)6 · 3H2O | Hex. 6/m : P63/m |
| Agardite-(Y) | YCu6(AsO4)3(OH)6 · 3H2O | Hex. 6/m : P63/m |
| Calciopetersite | CaCu6(PO4)2(PO3OH)(OH)6 · 3H2O | Hex. 6/m : P63/m |
| Goudeyite | AlCu6(AsO4)3(OH)6 · 3H2O | Hex. |
| Mixite | BiCu6(AsO4)3(OH)6 · 3H2O | Hex. 6/m : P63/m |
| Petersite-(Ce) | Cu6Ce(PO4)3(OH)6 · 3H2O | Hex. 6/m : P63/m |
| Petersite-(Y) | (Y,Ce,Nd)Cu6(PO4)3(OH)6 · 3H2O | Hex. |
| Plumboagardite | (Pb,REE,Ca)Cu6(AsO4)3(OH)6 · 3H2O | Hex. 6/m : P63/m |
| Zálesíite | CaCu6(AsO4)2(AsO3OH)(OH)6 · 3H2O | Hex. 6/m : P63/m |
Related Minerals - Strunz-mindat Grouping
| 8.DL.05 | Foggite | CaAl(PO4)(OH)2 · H2O |
| 8.DL.10 | Cyrilovite | NaFe3+3(PO4)2(OH)4 · 2H2O |
| 8.DL.10 | Millisite | (Na,K)CaAl6(PO4)4(OH)9 · 3H2O |
| 8.DL.10 | Wardite | NaAl3(PO4)2(OH)4 · 2H2O |
| 8.DL.10 | Fluorowardite | NaAl3(PO4)2F2(OH)2(H2O)2 |
| 8.DL.15 | Agardite-(Nd) | NdCu6(AsO4)3(OH)6 · 3H2O |
| 8.DL.15 | Agardite-(Y) | YCu6(AsO4)3(OH)6 · 3H2O |
| 8.DL.15 | Agardite-(Ce) | CeCu6(AsO4)3(OH)6 · 3H2O |
| 8.DL.15 | Agardite-(Dy) | (Dy,La)Cu6(AsO4)3(OH)6 · 3H2O |
| 8.DL.15 | Agardite-(La) | LaCu6(AsO4)3(OH)6 · 3H2O |
| 8.DL.15 | Goudeyite | AlCu6(AsO4)3(OH)6 · 3H2O |
| 8.DL.15 | Mixite | BiCu6(AsO4)3(OH)6 · 3H2O |
| 8.DL.15 | Petersite-(Y) | (Y,Ce,Nd)Cu6(PO4)3(OH)6 · 3H2O |
| 8.DL.15 | Zálesíite | CaCu6(AsO4)2(AsO3OH)(OH)6 · 3H2O |
| 8.DL.15 | Plumboagardite | (Pb,REE,Ca)Cu6(AsO4)3(OH)6 · 3H2O |
| 8.DL.15 | Calciopetersite | CaCu6(PO4)2(PO3OH)(OH)6 · 3H2O |
| 8.DL.15 | Petersite-(Ce) | Cu6Ce(PO4)3(OH)6 · 3H2O |
| 8.DL.20 | Cheremnykhite | Pb3Zn3(VO4)2(TeO6) |
| 8.DL.20 | Dugganite | Pb3Zn3(AsO4)2(TeO6) |
| 8.DL.20 | Kuksite | Pb3Zn3(PO4)2(TeO6) |
| 8.DL.20 | Wallkilldellite | Ca2Mn2+3(AsO4)2(OH)4 · 9H2O |
| 8.DL.20 | Wallkilldellite-(Fe) | (Ca,Cu)4Fe2+6(AsO4,SiO4)4(OH,O)8 · 18H2O |
| 8.DL.25 | Angastonite | CaMgAl2(PO4)2(OH)4 · 7H2O |
| 8.DL.30 | Långbanshyttanite | Pb2Mn2Mg(AsO4)2(OH)4 · 6H2O |
Fluorescence of Petersite-(La)
Not fluorescent
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 Petersite-(La)
mindat.org URL:
https://www.mindat.org/min-52654.html
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References for Petersite-(La)
Reference List:
www.issp.u-tokyo.ac.jp (n.d.) http://www.issp.u-tokyo.ac.jp/labs/mdcl/lab/denken/wordpress/?page_id=3266
forum.amiminerals.it (n.d.) http://forum.amiminerals.it/viewtopic.php?f=5&t=16296&sid=26e11dd286a59883897ab34d776e6fbd
Hålenius, U., Hatert, F., Pasero, M., Mills, S. J. (2018) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) Newsletter 41. European Journal of Mineralogy, 30. 183-186 doi:10.1127/ejm/2018/0030-2736p.184
Nishio–Hamane, Daisuke, Ohnishi, Masayuki, Shimobayashi, Norimasa, Momma, Koichi, Miyawaki, Ritsuro, Inaba, Sachio (2020) Petersite–(La), a new mixite–group mineral from Ohgurusu, Kiwa, Kumano City, Mie Prefecture, Japan. Journal of Mineralogical and Petrological Sciences, 115 (3) 286-295 doi:10.2465/jmps.191211b
Localities for Petersite-(La)
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.
Japan (TL) | |
| Hålenius et al. (2018) +1 other reference |
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Detani River, Ohgurusu, Kiwa town, Kumano City, Mie Prefecture, Japan