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Coeruleolactite
A discredited species name
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About Coeruleolactite
Colour:
Milk-white, light blue
Lustre:
Vitreous, Waxy
Hardness:
5
Specific Gravity:
2.55 - 2.7
Crystal System:
Triclinic
Name:
From the Greek "coeruleus" for "blue" and "lactis" for "milk" in allusion to its typical colour.
A discredited member of the Turquoise Group.
Originally described from Rindsberg Mine, Katzenelnbogen, Taunus Mts, Rhineland-Palatinate, Germany.
Originally described from Rindsberg Mine, Katzenelnbogen, Taunus Mts, Rhineland-Palatinate, Germany.
Unique Identifiers
Mindat ID:
1103
Long-form identifier:
mindat:1:1:1103:3
IMA Classification of Coeruleolactite
Discredited
Classification of Coeruleolactite
8.DD.15
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
D : With only medium-sized cations, (OH, etc.):RO4= 2:1
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
D : With only medium-sized cations, (OH, etc.):RO4= 2:1
42.9.3.2
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
9 : (AB)7(XO4)4Zq·xH2O
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
9 : (AB)7(XO4)4Zq·xH2O
Physical Properties of Coeruleolactite
Vitreous, Waxy
Transparency:
Translucent
Colour:
Milk-white, light blue
Streak:
White
Hardness:
5 on Mohs scale
Fracture:
Irregular/Uneven, Conchoidal
Density:
2.55 - 2.7 g/cm3 (Measured)
Optical Data of Coeruleolactite
Type:
Uniaxial (+)
RI values:
nω = 1.58 nε = 1.588
Max. Birefringence:
δ = 0.008
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:
Moderate (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 uniaxial interference figure - the conoscopic
(convergent-light, Bertrand-lens-in) view, for a grain cut with the optic axis
centred and vertical. The coloured rings are isochromatics, computed with the
same physics as the Michel-Lévy bar above; the dark cross is the isogyre.
For a genuinely uniaxial mineral viewed this way, that cross stays perfectly stationary if you rotate the stage - unlike a biaxial mineral, where it splits apart on rotation. That invariance is itself the standard diagnostic test for telling uniaxial and biaxial minerals apart at the microscope.
For a genuinely uniaxial mineral viewed this way, that cross stays perfectly stationary if you rotate the stage - unlike a biaxial mineral, where it splits apart on rotation. That invariance is itself the standard diagnostic test for telling uniaxial and biaxial minerals apart at the microscope.
Crystallography of Coeruleolactite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 7.529 Å, b = 9.951 Å, c = 7.782 Å
α = 112.51°, β = 116.54°, γ = 68.57°
α = 112.51°, β = 116.54°, γ = 68.57°
Ratio:
a:b:c = 0.757 : 1 : 0.782
Unit Cell V:
468.35 Ã
Âģ (Calculated from Unit Cell)
Z:
1
Morphology:
Microcrystalline to cryptocrystalline; fibrous veinlets, botryoidal aggregates, and crusts.
Geological Environment
Geological Setting:
Oxidized zones of iron deposits; pegmatite.
Other Language Names for Coeruleolactite
German:CÅruleolactin
Coeruleolaktit
Coeruleolaktit
Spanish:Coeruleolactita
Common Associates
Associations Based on Photo Data:
| 1 photo of Coeruleolactite associated with DufrÃĐnite | Ca0.5Fe2+Fe3+5(PO4)4(OH)6 · 2H2O |
Related Minerals - Strunz-mindat Grouping
| 8.DD. | Penberthycroftite | [Al6(AsO4)3(OH)9(H2O)5] · 8H2O |
| 8.DD. | Bettertonite | [Al6(AsO4)3(OH)9(H2O)5] · 11H2O |
| 8.DD. | Vargite | MnCu2Mn2(AsO4)2(OH)4(H2O)4 |
| 8.DD. | Galeaclolusite | Al6(AsO4)3(OH)9(H2O)4 · 8H2O |
| 8.DD.05 | Luetheite | Cu2Al2(AsO4)2(OH)4 |
| 8.DD.05 | Chenevixite | Cu2Fe3+2(AsO4)2(OH)4 |
| 8.DD.10 | Akrochordite | MnMn2Mn2(AsO4)2(OH)4(H2O)4 |
| 8.DD.10 | Guanacoite | MgCu2Mg2(AsO4)2(OH)4(H2O)4 |
| 8.DD.15 | 'UM1981-32-PO:FeH' | Fe2+Fe3+6(PO4)4-x[PO3(OH)]x(OH)8 · 4H2O |
| 8.DD.15 | Afmite | Al3(OH)4(H2O)3(PO4)(PO3OH) · H2O |
| 8.DD.15 | Aheylite | (Fe2+,Zn)Al6(PO4)4(OH)8 · 4H2O |
| 8.DD.15 | Faustite | ZnAl6(PO4)4(OH)8 · 4H2O |
| 8.DD.15 | Planerite | Al6(PO4)2(PO3OH)2(OH)8 · 4H2O |
| 8.DD.15 | Chalcosiderite | CuFe3+6(PO4)4(OH)8 · 4H2O |
| 8.DD.15 | Turquoise | CuAl6(PO4)4(OH)8 · 4H2O |
| 8.DD.20 | Eosphorite | Mn2+Al(PO4)(OH)2 · H2O |
| 8.DD.20 | Ernstite | (Mn2+,Fe3+)Al(PO4)(OH,O)2 · H2O |
| 8.DD.20 | Lefontite | Fe2Al2Be(PO4)2(OH)6 |
| 8.DD.20 | Childrenite | Fe2+Al(PO4)(OH)2 · H2O |
| 8.DD.25 | Kobokoboite | Al6(PO4)4(OH)6 · 11H2O |
| 8.DD.30 | Smamite | Ca2Sb(OH)4[H(AsO4)2] · 6H2O |
| 8.DD.35 | 'Gutsevichite' | Al3(PO4)2(OH)3 · 8H2O |
| 8.DD.40 | 'Laubmannite (of Moore)' | (Fe3+,Fe2+,M)8+x(OH,H2O)9(H2O)2(PO4)5, M = Fe3+, Cu2+ or other metal cation, x ~ 0.1. |
Other Information
Notes:
Soluble in acids and in alkalies.
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 Coeruleolactite
mindat.org URL:
https://www.mindat.org/min-1103.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Coeruleolactite
Reference List:
Larsen, Esper S. (1921) The microscopic determination of the nonopaque minerals. Bulletin 679. US Geological Survey doi:10.3133/b679 p.59
McConnell, D. (1942) X-ray data on several phosphate minerals. American Journal of Science, 240 (9) 649-657 doi:10.2475/ajs.240.9.649
Fischler, Emil (1958) Ãber die Beziehungen zwischen Coeruleolactit, Planerit, TÞrkis, Alumochalkosiderit und Chalkosiderit. BeitrÃĪge zur Mineralogie und Petrographie, 6 (3) 182-189 doi:10.1007/bf01084815[Powder pattern, chemistry]
Localities for Coeruleolactite
Showing 9 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.
Bolivia | |
| SEM analyses by Gene Foord et al. (analyses copies courtesy of Brian Kosnar) |
Brazil | |
| Cassedanne et al. (1980) |
DR Congo | |
| Van Wambeke (1971) |
Germany | |
| Stieglitz et al. (1987) |
| Petersen (1871) |
Romania | |
| minerals-of-the-carpathians.eu (2008) |
UK | |
| Golley et al. (1995) |
USA | |
| Foord et al. (1998) |
Uzbekistan | |
| Mineraly Uzbekistana (Minerals of the Uzbekistan) |
General Trimble's Mine, East Whiteland Township, Chester County, Pennsylvania, USA