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Lazaraskeite
A valid IMA mineral species
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About Lazaraskeite
Warren Lazar and Beverly Raskin Ross
Formula:
Cu(C2H3O3)2
As an organic compound, the formula may also be written as Cu(OCOCH2OH)2 or Cu[O(CO)CH2(OH)]2.
Colour:
Greenish blue
Lustre:
Vitreous
Hardness:
2
Specific Gravity:
2.12
Crystal System:
Monoclinic
Member of:
Name:
Named in honor of Warren Lazar, American prospector who discovered the mineral, and his wife Beverly Raskin Ross. They provided the first specimens for study.
Type Locality:
Known as a synthetic compound ('bis(glycolato)copper(II)') - first natural crystalline glycolate mineral. The other three are stanevansite (Mg), jimkrieghite (Ca), and lianbinite (NH4; more complex).
Unique Identifiers
Mindat ID:
53400
Long-form identifier:
mindat:1:1:53400:8
IMA Classification of Lazaraskeite
Approved
IMA Formula:
Cu2+(C2H3O3)1-2
Approval year:
2019
First published:
2022
Type description reference:
Yang, Hexiong, Gu, Xiangping, Gibbs, Ronald B., Evans, Stanley H., Downs, Robert T., Jibrin, Zak (2022) Lazaraskeite, Cu(C2H3O3)2, the first organic mineral containing glycolate, from the Santa Catalina Mountains, Tucson, Arizona, U.S.A. American Mineralogist, 107 (3) 509-516 doi:10.2138/am-2021-7895
Classification of Lazaraskeite
10.AA.40
10 : ORGANIC COMPOUNDS
A : Salts of organic acids
A : Formates, Acetates, etc.
10 : ORGANIC COMPOUNDS
A : Salts of organic acids
A : Formates, Acetates, etc.
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 |
|---|---|---|
| Lza | 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 Lazaraskeite
Vitreous
Transparency:
Transparent
Colour:
Greenish blue
Streak:
White
Hardness:
2 on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
{101}
{101}
Parting:
none
Density:
2.12 g/cm3 (Measured) 2.138 g/cm3 (Calculated)
Optical Data of Lazaraskeite
Type:
Biaxial (-)
RI values:
nα = 1.595(3) nβ = 1.629(8) nγ = 1.645(5)
2V:
Measured: 69° (2), Calculated: 67°
Max. Birefringence:
δ = 0.050
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:
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.
Pleochroism:
Visible
Comments:
X=Z= light pale blue green Y= blue green
Chemistry of Lazaraskeite
Mindat Formula:
Cu(C2H3O3)2
As an organic compound, the formula may also be written as Cu(OCOCH2OH)2 or Cu[O(CO)CH2(OH)]2.
As an organic compound, the formula may also be written as Cu(OCOCH2OH)2 or Cu[O(CO)CH2(OH)]2.
Element Weights:
Elements listed:
Crystallography of Lazaraskeite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/c
Setting:
P21/n
Cell Parameters:
a = 5.1049(2) Å, b = 8.6742(4) Å, c = 7.7566(3) Å
β = 106.834(2)°
β = 106.834(2)°
Ratio:
a:b:c = 0.589 : 1 : 0.894
Unit Cell V:
328.75 ų (Calculated from Unit Cell)
Z:
2
Twinning:
none
Comment:
for form 1
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 5.64 Å | (100) |
| 4.77 Å | (52) |
| 4.25 Å | (21) |
| 3.34 Å | (63) |
| 3.23 Å | (25) |
| 2.50 Å | (22) |
| 2.22 Å | (25) |
| 2.09 Å | (22) |
Reference:
Yang, Hexiong, Gu, Xiangping, Gibbs, Ronald B., Evans, Stanley H., Downs, Robert T., Jibrin, Zak (2022) Lazaraskeite, Cu(C2H3O3)2, the first organic mineral containing glycolate, from the Santa Catalina Mountains, Tucson, Arizona, U.S.A. American Mineralogist, 107 (3) 509-516 doi:10.2138/am-2021-7895
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 10a: Neoproterozoic oxygenation/terrestrial biosphere | <0.6 |
| 53 : Other minerals with taphonomic origins | <0.4 |
Type Occurrence of Lazaraskeite
General Appearance of Type Material:
Euhedral crystals to 0.8 mm.
Place of Conservation of Type Material:
University of Arizona Mineral Museum, 1601 E University Blvd, Tucson, AZ 85719, USA, catalog # 22052 (holotype); RRUFF project, deposition # R180026 (cotype).
Associated Minerals at Type Locality:
Reference:
Yang, Hexiong, Gu, Xiangping, Gibbs, Ronald B., Evans, Stanley H., Downs, Robert T., Jibrin, Zak (2022) Lazaraskeite, Cu(C2H3O3)2, the first organic mineral containing glycolate, from the Santa Catalina Mountains, Tucson, Arizona, U.S.A. American Mineralogist, 107 (3) 509-516 doi:10.2138/am-2021-7895
Synonyms of Lazaraskeite
Other Language Names for Lazaraskeite
Dutch:Lazaraskeiet
German:Lazaraskeit
Relationship of Lazaraskeite to other Species
Member of:
Other Members of Glycolate Subgroup:
| Glecklerite | Na(C2H3O3) | Orth. mmm(2/m2/m2/m) : Pbcm |
| Jimkrieghite | Ca(C2H3O3)2 | Orth. mmm(2/m2/m2/m) : Pbca |
| Lianbinite | (NH4)(C2H3O3)(C2H4O3) | Mon. 2/m : P21/c |
| Puschridgeite | Mn(C2H3O3)2(H2O)2 | Mon. 2/m : P21/c |
| Rasmussenite | Ca(C2H3O3)2 · 3H2O | Tric. 1 : P1 |
| Stanevansite | Mg(C2H3O3)2 · 2H2O | Mon. 2/m : P21/c |
Common Associates
Associations Based on Photo Data:
| 3 photos of Lazaraskeite associated with Stanevansite | Mg(C2H3O3)2 · 2H2O |
| 1 photo of Lazaraskeite associated with Domitrovicite | Zn(C2H3O3)2 · 2H2O |
| 1 photo of Lazaraskeite associated with Rasmussenite | Ca(C2H3O3)2 · 3H2O |
| 1 photo of Lazaraskeite associated with Muscovite | KAl2(AlSi3O10)(OH)2 |
Related Minerals - Strunz-mindat Grouping
| 10.AA. | Henrysunite | Na2(C2H3O3)2(H2O) |
| 10.AA.05 | Formicaite | Ca(HCOO)2 |
| 10.AA.10 | Dashkovaite | Mg(HCOO)2 · 2H2O |
| 10.AA.20 | Acetamide | CH3CONH2 |
| 10.AA.25 | Calclacite | Ca(CH3COO)Cl · 5H2O |
| 10.AA.30 | Paceite | CaCu(CH3COO)4 · 6H2O |
| 10.AA.35 | Hoganite | Cu(CH3COO)2 · H2O |
| 10.AA.40 | Lianbinite | (NH4)(C2H3O3)(C2H4O3) |
| 10.AA.40 | Domitrovicite | Zn(C2H3O3)2 · 2H2O |
| 10.AA.40 | Puschridgeite | Mn(C2H3O3)2(H2O)2 |
| 10.AA.40 | Glecklerite | Na(C2H3O3) |
| 10.AA.40 | Jimkrieghite | Ca(C2H3O3)2 |
| 10.AA.40 | Stanevansite | Mg(C2H3O3)2 · 2H2O |
| 10.AA.40 | Rasmussenite | Ca(C2H3O3)2 · 3H2O |
| 10.AA.45 | Marchettiite | C5H7N5O3 |
Other Information
Notes:
insoluble in water or acetone
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 Lazaraskeite
mindat.org URL:
https://www.mindat.org/min-53400.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
Mineral Dealers:
References for Lazaraskeite
Reference List:
Ye, Qing-Song; Xie, Ming-Jin; Liu, Wei-Ping; Chen, Xi-Zhu; Chang, Qiao-Wen; Yu, Yao (2010) Refinement of the crystal structure of bis(glycolato)copper(II), Cu(C2H3O3)2. Zeitschrift für Kristallographie - New Crystal Structures, 225 (3). p.481-482. doi:10.1524/ncrs.2010.0211
Yoneyama, Shota; Kodama, Takeshi; Kikuchi, Koichi; Kawabata, Yohei; Kikuchi, Kentaro; Ono, Toshio; Hosokoshi, Yuko; Fujita, Wataru (2013) Large structural transformation and ferromagnetic ordering in a coordination polymer with a two-dimensional square-planar lattice, bis(glycolato)copper(II). CrystEngComm, 15 (47). p.10193. doi:10.1039/c3ce41806e
Yoneyama, Shota; Kodama, Takeshi; Kikuchi, Koichi; Fujisawa, Takumi; Yamaguchi, Akira; Sumiyama, Akihiko; Shuku, Yoshiaki; Aoyagi, Shinobu; Fujita, Wataru (2016) Deuterium substitution effects on the structural and magnetic phase transitions of a hydrogen-bonded coordination polymer, bis(glycolato)copper(II). Dalton Transactions, 45 (42). p.16774-16778. doi:10.1039/c6dt03592b
Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2019) New minerals and nomenclature modifications approved in 2019. CNMNC Newsletter No 48. Mineralogical Magazine, 83 (2) 315-317 doi:10.1180/mgm.2019.23
Yang, Hexiong, Gu, Xiangping, Gibbs, Ronald B., Evans, Stanley H., Downs, Robert T., Jibrin, Zak (2022) Lazaraskeite, Cu(C2H3O3)2, the first organic mineral containing glycolate, from the Santa Catalina Mountains, Tucson, Arizona, U.S.A. American Mineralogist, 107 (3) 509-516 doi:10.2138/am-2021-7895
Localities for Lazaraskeite
Showing 1 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.
USA (TL) | |
| European Journal of Mineralogy +3 other references |
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Western end, Pusch Ridge, Pima County, Arizona, USA