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Calcioancylite-(La)
A valid IMA mineral species
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Formula:
(LaCa)(CO3)2(OH) · H2O
Colour:
colourless to pale pinkish gray
Lustre:
Vitreous
Hardness:
4
Specific Gravity:
4.324 (Calculated)
Crystal System:
Orthorhombic
Member of:
Name:
for its relation to ancylite-(La) and similar species
Type Locality:
This page provides mineralogical data about Calcioancylite-(La).
Unique Identifiers
Mindat ID:
55761
Long-form identifier:
mindat:1:1:55761:0
Similar Names
| Calcioancylite | A synonym | |
| Calcioancylite-(Ce) | A valid IMA mineral species - grandfathered | (Ce,Ca,Sr)CO3(OH,H2O) |
| Calcioancylite-(Nd) | A valid IMA mineral species | Ca(Nd,La,Ce)(CO3)2(OH).H2O |
IMA Classification of Calcioancylite-(La)
Approved
IMA Formula:
(LaCa)(CO3)2(OH)(H2O)
Approval year:
2021
Type description reference:
Wang, Yanjuan, Gu, Xiangping, Dong, Guochen, Hou, Zengqian, Nestola, Fabrizio, Yang, Zhusen, Fan, Guang, Wang, Yufei, Qu, Kai (2023) Calcioancylite-(La), (La,Ca)2(CO3)2(OH,H2O)2, a new member of the ancylite group from Gejiu nepheline syenite, Yunnan Province, China. Mineralogical Magazine, 87 (4) 554-560 doi:10.1180/mgm.2023.28
Classification of Calcioancylite-(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 IMAâCNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Canc-La | IMAâCNMNC | Warr, L.N. (2021). IMAâCNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Calcioancylite-(La)
Vitreous
Transparency:
Transparent, Translucent
Colour:
Colourless to pale pinkish gray
Streak:
White
Hardness:
4 on Mohs scale
Hardness:
VHN50=175 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
4.324 g/cm3 (Calculated)
Optical Data of Calcioancylite-(La)
Type:
Biaxial (-)
RI values:
nα = 1.662 nβ = 1.730 nγ = 1.771
2V:
Measured: 70° (1), Calculated: 73°
Max. Birefringence:
δ = 0.109
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 Âĩm 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 Âĩm 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.
Chemistry of Calcioancylite-(La)
Mindat Formula:
(LaCa)(CO3)2(OH) · H2O
Element Weights:
Chemical Analysis
Empirical formulas:
| Sample ID | Empirical Formula |
|---|---|
| 1 | (La0.58Ce0.55Pr0.14Nd0.10Ca0.39Sr0.20K0.04)ÎĢ2.00(CO3)2[(OH)1.25F0.06(H2O)0.69]ÎĢ2.00 |
Sample references:
Crystallography of Calcioancylite-(La)
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Cell Parameters:
a = 5.0253(3) Å, b = 8.5152(6) Å, c = 7.2717(6) Å
Ratio:
a:b:c = 0.59 : 1 : 0.854
Unit Cell V:
311.17 Ã
Âģ (Calculated from Unit Cell)
Z:
2
Comment:
the space group is Pmcn
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.322 Ã | (75) |
| 3.693 Ã | (68) |
| 2.956 Ã | (80) |
| 2.640 Ã | (47) |
| 2.520 Ã | (55) |
| 2.335 Ã | (100) |
| 2.077 Ã | (44) |
| 2.012 Ã | (42) |
Reference:
Wang, Yanjuan, Gu, Xiangping, Dong, Guochen, Hou, Zengqian, Nestola, Fabrizio, Yang, Zhusen, Fan, Guang, Wang, Yufei, Qu, Kai (2023) Calcioancylite-(La), (La,Ca)2(CO3)2(OH,H2O)2, a new member of the ancylite group from Gejiu nepheline syenite, Yunnan Province, China. Mineralogical Magazine, 87 (4) 554-560 doi:10.1180/mgm.2023.28
Type Occurrence of Calcioancylite-(La)
General Appearance of Type Material:
aggregates of subhedral grains, and the size of single crystals varies between 5â20 Âĩm
Place of Conservation of Type Material:
mineralogical collections of the Geological Museum of China, no. 16, Yangrou Hutong, Xisi, Beijing 100031, Peopleâs Republic of China, catalogue number M16129
Geological Setting of Type Material:
nepheline syenite
Associated Minerals at Type Locality:
Reference:
Wang, Yanjuan, Gu, Xiangping, Dong, Guochen, Hou, Zengqian, Nestola, Fabrizio, Yang, Zhusen, Fan, Guang, Wang, Yufei, Qu, Kai (2023) Calcioancylite-(La), (La,Ca)2(CO3)2(OH,H2O)2, a new member of the ancylite group from Gejiu nepheline syenite, Yunnan Province, China. Mineralogical Magazine, 87 (4) 554-560 doi:10.1180/mgm.2023.28
Synonyms of Calcioancylite-(La)
Other Language Names for Calcioancylite-(La)
Dutch:Calcioancyliet-(La)
German:Calcioankylit-(La)
Relationship of Calcioancylite-(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-(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) |
| 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. | 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.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 Calcioancylite-(La)
mindat.org URL:
https://www.mindat.org/min-55761.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Calcioancylite-(La)
Reference List:
Miyawaki, Ritsuro, Hatert, FrÃĐdÃĐric, Pasero, Marco, Mills, Stuart J. (2022) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) â Newsletter 65. European Journal of Mineralogy, 34 (1) 143-148 doi:10.5194/ejm-34-143-2022
Wang, Yanjuan, Gu, Xiangping, Dong, Guochen, Hou, Zengqian, Nestola, Fabrizio, Yang, Zhusen, Fan, Guang, Wang, Yufei, Qu, Kai (2023) Calcioancylite-(La), (La,Ca)2(CO3)2(OH,H2O)2, a new member of the ancylite group from Gejiu nepheline syenite, Yunnan Province, China. Mineralogical Magazine, 87 (4) 554-560 doi:10.1180/mgm.2023.28
Localities for Calcioancylite-(La)
Showing 4 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
â - 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.
Canada | |
| Canadian Museum of Nature collection |
China (TL) | |
| Miyawaki et al. (2022) |
| Wang et al. (2023) +1 other reference |
Norway | |
| Husdal (2023) |
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