Gysinite-(Nd)
A valid IMA mineral species
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About Gysinite-(Nd)
Formula:
PbNd(CO3)2(OH) · H2O
Colour:
light pink to reddish pink
Lustre:
Vitreous, Greasy
Hardness:
4 - 4½
Specific Gravity:
4.82 (Calculated)
Crystal System:
Orthorhombic
Member of:
Name:
Named in honor of Marcel Gysin (1891–1974), Professor of Mineralogy, University of Geneva, who worked for several years in the Shaba Province of Zaire, where this mineral originated.
Type Locality:
Unique Identifiers
Mindat ID:
1786
Long-form identifier:
mindat:1:1:1786:8
Similar Names
| Gysinite | A synonym | |
| Gysinite-(Ce) | A valid IMA mineral species | PbCe(CO3)2(OH) · H2O |
| Gysinite-(La) | A valid IMA mineral species | PbLa(CO3)2(OH) · H2O |
IMA Classification of Gysinite-(Nd)
Classification of Gysinite-(Nd)
5.DC.05
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
16b.1.1.4
16b : HYDRATED CARBONATES CONTAINING HYDROXYL OR HALOGEN
1 : AmBn(XO3)pZqxH2O & with (m+n):p = 1:1
16b : HYDRATED CARBONATES CONTAINING HYDROXYL OR HALOGEN
1 : AmBn(XO3)pZq
11.9.4
11 : Carbonates
9 : Carbonates of Pb, Zr and Th
11 : Carbonates
9 : Carbonates of Pb, Zr and Th
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-Nd | 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-(Nd)
Vitreous, Greasy
Transparency:
Translucent
Colour:
Light pink to reddish pink
Streak:
White to light pink
Hardness:
4 - 4½ on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Density:
4.82 g/cm3 (Calculated)
Comment:
Sinks in Clerici's solution
Optical Data of Gysinite-(Nd)
Type:
Biaxial (-)
RI values:
nα = 1.745 nβ = 1.805 nγ = 1.84
2V:
Measured: 70° , Calculated: 72°
Max. Birefringence:
δ = 0.095
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:
Very High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).
Relative to Canada balsam mounting medium (n ≈ 1.537).
This shows the grain boundary and Becke line effect under plane-polarised
light, based on the contrast between this mineral's average refractive
index and the mounting medium. It does not take into account mineral
colouration.
In focus
Interference Figure:
This shows the idealized biaxial acute bisectrix (Bxa) interference figure
- the conoscopic view for a grain cut perpendicular to the acute bisectrix, using
this mineral's 2V. The two small white dots mark the melatopes - the points
where the two optic axes emerge - and are shown only when they fall within the
field of view. The coloured bands are isochromatics, and the dark bands are
isogyres.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Dispersion:
r > v moderate
Chemistry of Gysinite-(Nd)
Mindat Formula:
PbNd(CO3)2(OH) · H2O
Element Weights:
Crystallography of Gysinite-(Nd)
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Cell Parameters:
a = 5.0028(8) Å, b = 8.555(1) Å, c = 7.2392(8) Å
Ratio:
a:b:c = 0.585 : 1 : 0.846
Unit Cell V:
309.83 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Pseudo-octahedral, {111} and {110}.
Twinning:
Twin plane (100), axis unknown.
Comment:
Space group Pmcn.
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
Console Off | On | Grey | Yellow
Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0010477 | Gysinite-(Nd) | Feng W J, Zhou G P, Liu Z B, Xu Y (2007) Nd(CO3)(OH) from single-crystal data Acta Crystallographica E63 i174-i174 |  | 2007 | synthetic | 0 | 293 |
| 0010922 | Gysinite-(Nd) | Chabot B, Sarp H (1985) Structure refinement of gysinite La.16Nd1.18Pb0.66(CO3)2(OH)1.34(H2O).66 Zeitschrift fur Kristallographie 171 155-158 |  | 1985 | Shinkolobwe, Shaba - Zaire | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 5.54 Å | (50) |
| 4.326 Å | (100) |
| 3.676 Å | (100) |
| 2.950 Å | (50) |
| 2.336 Å | (50) |
| 2.074 Å | (60) |
| 2.021 Å | (50) |
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 Gysinite-(Nd)
General Appearance of Type Material:
euhedral crystals
Place of Conservation of Type Material:
Department of Mineralogy, Geneva Natural History Museum
Synonyms of Gysinite-(Nd)
Gysinite (in part)
Other Language Names for Gysinite-(Nd)
Relationship of Gysinite-(Nd) 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-(La) | PbLa(CO3)2(OH) · H2O | Orth. mmm(2/m2/m2/m) |
Common Associates
Associations Based on Photo Data:
| 5 photos of Gysinite-(Nd) associated with Cerussite | PbCO3 |
| 1 photo of Gysinite-(Nd) associated with Schuilingite-(Nd) | PbCu(Nd,Gd,Sm,Y)(CO3)3(OH) · 1.5H2O |
| 1 photo of Gysinite-(Nd) associated with Hemimorphite | Zn4Si2O7(OH)2 · H2O |
| 1 photo of Gysinite-(Nd) associated with Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
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. | Gysinite-(La) | PbLa(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.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 |
Fluorescence of Gysinite-(Nd)
None observed (SW or LW)
Other Information
Notes:
Soluble with effervescence in cold dilute hydrochloric acid.
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-(Nd)
mindat.org URL:
https://www.mindat.org/min-1786.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Gysinite-(Nd)
Reference List:
Sarp, Halil, Bertrand, Jean (1985) Gysinite, Pb(Nd,La)(CO3)2(OH)·H2O, a new lead, rare-earth carbonate from Shinkolobwe, Shaba, Zaire and its relationship to ancylite. American Mineralogist, 70 (11-12) 1314-1317
Chabot, Bernard, Sarp, Halil (1985) Structure refinement of Gysinite La0.16Nd1.18Pb0.66(CO3)2(OH)1.34 · 0.66 H2O. Zeitschrift für Kristallographie, 171 (1-2). 155-158 doi:10.1524/zkri.1985.171.1-2.155
Nickel, Ernest H., Mandarino, Joseph A. (1987) Procedures involving the IMA Commission on New Minerals and Mineral Names and guidelines on mineral nomenclature. American Mineralogist, 72 (9-10) 1031-1042
Feng, Wun-Jun, Zhou, Guang-Peng, Liu, Zhao-Bin, Xu, Yan (2007) Nd(CO3)(OH) from single-crystal data. Acta Crystallographica Section E Structure Reports Online, 63 (9). i174 doi:10.1107/s160053680703721x
Localities for Gysinite-(Nd)
Showing 4 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.
DR Congo | |
| Jason B. Smith collection |
| Sarp et al. (1985) +2 other references |
Germany | |
| Blaß et al. (1996) |
Italy | |
| Sabelli et al. (1988) |
Quick NavTopAbout Gysinite-(Nd)Unique IdentifiersSimilar NamesIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesRelationshipsCommon AssociatesStrunz-MindatFluorescence Other InformationInternet Links References Localities Locality List
Kasompi Mine, Mutshatsha, Lualaba, DR Congo