Lavinskyite-1M
A structural variant of Lavinskyite
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About Lavinskyite-1M
Formula:
K(LiCu)Cu6(Si4O11)2(OH)4
Colour:
Bluish to pale blue
Hardness:
5
Specific Gravity:
3.613 (Calculated)
Crystal System:
Monoclinic
First Recorded Locality:
A polytype of Lavinskyite
Originally approved as "liguriaite", but subsequently recognised as a monoclinic MDO polytype of "lavinskyite" (IMA proposal 16-E), the latter being redefined as the orthorhombic MDO polytype lavinskyite-2O.
Originally approved as "liguriaite", but subsequently recognised as a monoclinic MDO polytype of "lavinskyite" (IMA proposal 16-E), the latter being redefined as the orthorhombic MDO polytype lavinskyite-2O.
Unique Identifiers
Mindat ID:
46178
Long-form identifier:
mindat:1:1:46178:4
GUID
(UUID V4):
(UUID V4):
8b2e1088-626e-4ea4-b17d-85f57ac7a305
IMA Classification of Lavinskyite-1M
IMA status notes:
Renamed by the IMA
Approval year:
2014
Approval history:
Approved as a new species, liguriaite (IMA 2014-035), then redefined as a monoclinic polytype of lavinskyite and renamed lavinskyite-1M (IMA proposal 16-E).
Physical Properties of Lavinskyite-1M
Transparency:
Transparent, Translucent
Colour:
Bluish to pale blue
Streak:
Very pale blue to whitish
Hardness:
5 on Mohs scale
Hardness Data:
Estimated
Comment:
∼5
Cleavage:
Perfect
Parallel to {100}
Parallel to {100}
Fracture:
Irregular/Uneven
Density:
3.613 g/cm3 (Calculated)
Optical Data of Lavinskyite-1M
Type:
Biaxial (+)
RI values:
nα = 1.674(2) nβ = 1.692(3) nγ = 1.730(3)
2V:
Measured: ∼75°° , Calculated: 70°
Max Birefringence:
δ = 0.056
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:
High
Pleochroism:
Visible
Comments:
Moderat: X (pale) blue, Y pale blue and Z pale blue with faint greenish tint
Chemistry of Lavinskyite-1M
Mindat Formula:
K(LiCu)Cu6(Si4O11)2(OH)4
Crystallography of Lavinskyite-1M
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 10.224(2) Å, b = 19.085(4) Å, c = 5.252(1) Å
β = 92.23(3)°, γ = 92.23(3)°
β = 92.23(3)°, γ = 92.23(3)°
Ratio:
a:b:c = 0.536 : 1 : 0.275
Unit Cell V:
1024 ų
Z:
2
Morphology:
Indistinct platelets (up to ∼0.15 mm in length), tabular on (100) and elongate along [001; aggregates.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 10.22 Å | (100) |
| 9.007 Å | (18) |
| 4.934 Å | (23) |
| 3.983 Å | (21) |
| 3.353 Å | (31) |
| 2.869 Å | (21) |
| 2.616 Å | (35) |
| 2.372 Å | (23) |
Comments:
From Type Description.
First Recorded Occurrence of Lavinskyite-1M
General Appearance of First Recorded Material:
As blue, micaceous aggregates embedded in calcite-filled microfractures and veinlets
Place of Conservation of First Recorded Material:
Type material is deposited in the collections of the Dipartimento di Scienze della Terra, Ambiente e Vita (DISTAV), Universita` degli Studi di Genova, Italy, catalogue number MO741, and the Natural History Museum Vienna, Vienna, Austria, catalogue number
Synonyms of Lavinskyite-1M
Fluorescence of Lavinskyite-1M
Non-fluorescent
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 Lavinskyite-1M
mindat.org URL:
https://www.mindat.org/min-46178.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Lavinskyite-1M
Reference List:
Williams, P. A., Hatert, F., Pasero, M., Mills, S. J. (2014) New minerals and nomenclature modifications approved in 2014, CNMNC Newsletter No 21. Mineralogical Magazine, 78 (4) 797-804 doi:10.1180/minmag.2014.078.4.03
Hålenius, U., Hatert, F., Pasero, M., Mills, S. J. (2016) New minerals and nomenclature modifications approved in 2016, CNMNC Newsletter 32. Mineralogical Magazine, 80 (5) 915-922 doi:10.1180/minmag.2016.080.084
Kolitsch, Uwe, Merlino, Stefano, Belmonte, Donato, Carbone, Cristina, Cabella, Roberto, Lucchetti, Gabriella, Ciriotti, Marco E. (2018) Lavinskyite-1M, K(LiCu)Cu6(Si4O11)2(OH)4, the monoclinic MDO equivalent of lavinskyite-2O (formerly lavinskyite), from the Cerchiara manganese mine, Liguria, Italy. European Journal of Mineralogy, 30 (4) 811-820 doi:10.1127/ejm/2018/0030-2731
Localities for Lavinskyite-1M
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.
Italy (FRL) | |
| Mineralogical Magazine +2 other references |
Cerchiara Mine, Borghetto di Vara, La Spezia Province, Liguria, Italy