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
GUID
(UUID V4):
(UUID V4):
8d03c750-ce2a-407e-af14-35d71744ce31
IMA Classification of Gysinite-(La)
Approved
First published:
2023
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 |
---|---|---|
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
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:
Very High
Comments:
Refractive indices measured in white light.
Chemistry of Gysinite-(La)
Mindat Formula:
PbLa(CO3)2(OH) · H2O
Crystallography of Gysinite-(La)
Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/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)
German:Gysinit-(La)
Relationship of Gysinite-(La) to other Species
Member of:
Other Members of this group:
Ancylite-(Ce) | CeSr(CO3)2(OH) · H2O | Orth. mmm (2/m 2/m 2/m) |
Ancylite-(La) | LaSr(CO3)2(OH) · H2O | Orth. mmm (2/m 2/m 2/m) |
Calcioancylite-(Ce) | (Ce,Ca,Sr)CO3(OH,H2O) | Orth. mmm (2/m 2/m 2/m) |
Calcioancylite-(La) | (LaCa)(CO3)2(OH) · H2O | Orth. mmm (2/m 2/m 2/m) |
Calcioancylite-(Nd) | Ca(Nd,La,Ce)(CO3)2(OH).H2O | Mon. m : Pm |
Gysinite-(Ce) | PbCe(CO3)2(OH)(H2O) | Orth. mmm (2/m 2/m 2/m) |
Gysinite-(Nd) | PbNd(CO3)2(OH) · H2O | Orth. mmm (2/m 2/m 2/m) |
Related Minerals - Strunz-mindat Grouping
5.DC. | Calcioancylite-(La) | (LaCa)(CO3)2(OH) · H2O |
5.DC. | Gysinite-(Ce) | PbCe(CO3)2(OH)(H2O) |
5.DC.05 | Ancylite-(Ce) | CeSr(CO3)2(OH) · H2O |
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 | Gysinite-(Nd) | PbNd(CO3)2(OH) · H2O |
5.DC.05 | Unnamed (La-analogue of Calcioancylite-(Ce)) | (La,Ce,Nd,Ca,Sr)CO3(OH,H2O) |
5.DC.05 | Ancylite-(La) | LaSr(CO3)2(OH) · H2O |
5.DC.05 | Kozoite-(Nd) | (Nd,La,Sm,Pr)(CO3)(OH) |
5.DC.05 | Kozoite-(La) | (La,Nd)(CO3)(OH) |
5.DC.05 | Unnamed (Ce-analogue of Kozoite-(La) and -(Nd)) | (Ce,La)(CO3)(OH) |
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)
Localities for Gysinite-(La)
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).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
China (TL) | |
| Miyawaki et al. (2022) +1 other reference |
Wu et al. (2023) |