Gysinite-(La)
A valid IMA mineral species
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Formula:
PbLa(CO3)2(OH) · H2O
Colour:
Colourless, pale yellow
Lustre:
Vitreous
Hardness:
3½ - 4
Specific Gravity:
5.007 (Calculated)
Crystal System:
Orthorhombic
Member of:
Name:
Named for the La-dominance and being the La analogue of gysinite-(Nd).
Type Locality:
The La analogue of gysinite-(Nd) and gysinite-(Ce). The Pb analogue of ancylite-(La). Unique combination of elements (at the upload time).
Unique Identifiers
Mindat ID:
56019
Long-form identifier:
mindat:1:1:56019:1
Similar Names
| Gysinite | A synonym | |
| Gysinite-(Ce) | A valid IMA mineral species | PbCe(CO3)2(OH) · H2O |
| Gysinite-(Nd) | A valid IMA mineral species | PbNd(CO3)2(OH) · H2O |
IMA Classification of Gysinite-(La)
Classification of Gysinite-(La)
5.DC.
5 : CARBONATES (NITRATES)
D : Carbonates with additional anions, with H2O
C : With large cations
5 : CARBONATES (NITRATES)
D : Carbonates with additional anions, with H2O
C : With large cations
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 for Standard |
|---|---|---|
| Gys-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 Gysinite-(La)
Vitreous
Transparency:
Transparent
Colour:
Colourless, pale yellow
Streak:
White
Hardness:
3½ - 4 on Mohs scale
Tenacity:
Brittle
Fracture:
Irregular/Uneven
Density:
5.007 g/cm3 (Calculated)
Optical Data of Gysinite-(La)
Type:
Biaxial (-)
RI values:
nα = 1.832(2) nβ = 1.849(4) nγ = 1.862(5)
2V:
Measured: 81.6°
Max. Birefringence:
δ = 0.030
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Moderate
Comments:
Refractive indices measured in white light.
Chemistry of Gysinite-(La)
Mindat Formula:
PbLa(CO3)2(OH) · H2O
Element Weights:
Crystallography of Gysinite-(La)
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Cell Parameters:
a = 5.0655(2) Å, b = 8.5990(3) Å, c = 7.3901(4) Å
Ratio:
a:b:c = 0.589 : 1 : 0.859
Unit Cell V:
321.90 ų (Calculated from Unit Cell)
Z:
2
Comment:
Non-standard space-group setting Pmcn.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 5.596 Å | (21) |
| 4.349 Å | (100) |
| 3.732 Å | (68) |
| 2.984 Å | (61) |
| 2.667 Å | (21) |
| 2.363 Å | (47) |
| 2.090 Å | (29) |
| 2.028 Å | (21) |
Comments:
Saima complex, Liaoning, China. Data from the type description.
Type Occurrence of Gysinite-(La)
General Appearance of Type Material:
Subhedral to anhedral, granular and platy crystals of 5 to 50 μm in size, in interstices or enclosed in microcline, aegirine and nepheline.
Place of Conservation of Type Material:
Type material is deposited in the mineralogical collections of the Geological Museum of China, No. 16 Yangrou Hutong, Xisi, Beijing 100031, People's Republic of China, catalogue no. M16133.
Geological Setting of Type Material:
In lujavrite from an alkaline complex. May be related to a post-magmatic carbonation event.
Associated Minerals at Type Locality:
Synonyms of Gysinite-(La)
Gysinite (in part)
Other Language Names for Gysinite-(La)
Dutch:Gysiniet-(La)
German:Gysinit-(La)
Relationship of Gysinite-(La) to other Species
Member of:
Other Members of Ancylite Group:
| Ancylite-(Ce) | CeSr(CO3)2(OH) · H2O | Orth. mmm(2/m2/m2/m) |
| Ancylite-(La) | LaSr(CO3)2(OH) · H2O | Orth. mmm(2/m2/m2/m) |
| Calcioancylite-(Ce) | (Ce,Ca,Sr)CO3(OH,H2O) | Orth. mmm(2/m2/m2/m) |
| Calcioancylite-(La) | (LaCa)(CO3)2(OH) · H2O | Orth. mmm(2/m2/m2/m) |
| Calcioancylite-(Nd) | Ca(Nd,La,Ce)(CO3)2(OH).H2O | Mon. m : Pm |
| Gysinite-(Ce) | PbCe(CO3)2(OH) · H2O | Orth. mmm(2/m2/m2/m) |
| Gysinite-(Nd) | PbNd(CO3)2(OH) · H2O | Orth. mmm(2/m2/m2/m) |
Related Minerals - Strunz-mindat Grouping
| 5.DC. | Gysinite-(Ce) | PbCe(CO3)2(OH) · H2O |
| 5.DC. | Calcioancylite-(La) | (LaCa)(CO3)2(OH) · H2O |
| 5.DC.05 | Kozoite-(La) | La(CO3)(OH) |
| 5.DC.05 | Calcioancylite-(Ce) | (Ce,Ca,Sr)CO3(OH,H2O) |
| 5.DC.05 | Calcioancylite-(Nd) | Ca(Nd,La,Ce)(CO3)2(OH).H2O |
| 5.DC.05 | 'Unnamed (Ce-analogue of Kozoite-(La) and -(Nd))' | (Ce,La)(CO3)(OH) |
| 5.DC.05 | Ancylite-(La) | LaSr(CO3)2(OH) · H2O |
| 5.DC.05 | Ancylite-(Ce) | CeSr(CO3)2(OH) · H2O |
| 5.DC.05 | Kozoite-(Nd) | Nd(CO3)(OH) |
| 5.DC.05 | Gysinite-(Nd) | PbNd(CO3)2(OH) · H2O |
| 5.DC.10 | Kamphaugite-(Y) | Ca(Y,REE)(CO3)2(OH) · H2O |
| 5.DC.15 | Sheldrickite | NaCa3(CO3)2F3 · H2O |
| 5.DC.20 | Thomasclarkite-(Y) | (Na,Ce)(Y,REE)(HCO3)(OH)3 · 4H2O |
| 5.DC.25 | Peterbaylissite | [Hg2]2+3[CO3]2(OH)2 · 4H2O |
| 5.DC.30 | Clearcreekite | [Hg2]2+3[CO3]2(OH)2 · 4H2O |
| 5.DC.35 | Niveolanite | NaBe(CO3)(OH) · 2H2O |
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 Gysinite-(La)
mindat.org URL:
https://www.mindat.org/min-56019.html
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References for Gysinite-(La)
Reference List:
Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2022) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 67. European Journal of Mineralogy, 34 (3) 359-364 doi:10.5194/ejm-34-359-2022
Wu, Bin, Gu, Xiang-ping, Rao, Can, Wang, Ru-cheng, Xing, Xing-qing, Wan, Jian-jun, Zhong, Fu-jun, Bonnetti, Christophe (2023) Gysinite-(La), PbLa(CO3)2(OH)⋅H2O, a new rare earth mineral of the ancylite group from the Saima alkaline complex, Liaoning Province, China. Mineralogical Magazine, 87 (1). 143-150 doi:10.1180/mgm.2022.126
Localities for Gysinite-(La)
Showing 2 localities.
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.
China | |
| Wu et al. (2023) |
| Miyawaki et al. (2022) +1 other reference |
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