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Lavinskyite-1M

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About Lavinskyite-1MHide

Formula:
K(LiCu)Cu6(Si4O11)2(OH)4
Colour:
Bluish to pale blue
Hardness:
5
Specific Gravity:
3.613 (Calculated)
Crystal System:
Monoclinic
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.


Classification of Lavinskyite-1MHide

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-1MHide

Transparency:
Transparent, Translucent
Colour:
Bluish to pale blue
Streak:
Very pale blue to whitish
Hardness:
Hardness Data:
Estimated
Comment:
∼5
Cleavage:
Perfect
Parallel to {100}
Fracture:
Irregular/Uneven
Density:
3.613 g/cm3 (Calculated)

Optical Data of Lavinskyite-1MHide

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.
Surface Relief:
High
Pleochroism:
Visible
Comments:
Moderat: X (pale) blue, Y pale blue and Z pale blue with faint greenish tint

Chemical Properties of Lavinskyite-1MHide

Formula:
K(LiCu)Cu6(Si4O11)2(OH)4

Crystallography of Lavinskyite-1MHide

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)°
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 DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
10.22(100)
9.007(18)
4.934(23)
3.983(21)
3.353(31)
2.869(21)
2.616(35)
2.372(23)
Comments:
From Type Description.

First Recorded Occurrence of Lavinskyite-1MHide

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-1MHide

Fluorescence of Lavinskyite-1MHide

Non-fluorescent

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Lavinskyite-1MHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Kolitsch, U., Carbone, C., Belmonte, D., Cabella, R. and Ciriotti, M.E. (2014) Liguriaite, IMA 2014-035. CNMNC Newsletter No. 21, August 2014, page 803; Mineralogical Magazine, 78, 797-804.
CNMNC Newsletter No. 32, August 2016
Kolitsch, U., Merlino, S., Belmonte, D., Carbone, C., Cabella, R., Lucchetti, G. and Ciriotti, M. 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. Eur. J. Mineral. 30, 811-820.

Internet Links for Lavinskyite-1MHide

Localities for Lavinskyite-1MHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Italy (FRL)
 
  • Liguria
    • La Spezia Province
      • Vara Valley
        • Borghetto Vara
Kolitsch, U., Carbone, C., Belmonte, D., Cabella, R. and Ciriotti, M.E. (2014) Liguriaite, IMA 2014-035. CNMNC Newsletter No. 21, August 2014, page 803; Mineralogical Magazine, 78, 797-804; Kolitsch, U., Merlino, S., Belmonte, D., Carbone, C., Cabella, R., Lucchetti, G. and Ciriotti, M. 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. Eur. J. Mineral. 30, 811-820.
Mineral and/or Locality  
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