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:
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
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.
Cerchiara Mine, Borghetto di Vara, La Spezia Province, Liguria, Italy