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About CoeruleolactiteHide

Milk-white, light blue
Vitreous, Waxy
Specific Gravity:
2.55 - 2.7
Crystal System:
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.

Classification of CoeruleolactiteHide


9 : (AB)7(XO4)4Zq·xH2O

Physical Properties of CoeruleolactiteHide

Vitreous, Waxy
Milk-white, light blue
Irregular/Uneven, Conchoidal
2.55 - 2.7 g/cm3 (Measured)    

Optical Data of CoeruleolactiteHide

Uniaxial (+)
RI values:
nω = 1.580 nε = 1.588
Max Birefringence:
δ = 0.008
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:

Crystallography of CoeruleolactiteHide

Crystal System:
Class (H-M):
1 - Pinacoidal
Space Group:
Cell Parameters:
a = 7.529 Å, b = 9.951 Å, c = 7.782 Å
α = 112.51°, β = 116.54°, γ = 68.57°
a:b:c = 0.757 : 1 : 0.782
Unit Cell V:
468.35 ų (Calculated from Unit Cell)
Microcrystalline to cryptocrystalline; fibrous veinlets, botryoidal aggregates, and crusts.

Other Language Names for CoeruleolactiteHide

Common AssociatesHide

CacoxeniteFe3+24AlO6(PO4)17(OH)12 · 75H2O
VarisciteAlPO4 · 2H2O
WavelliteAl3(PO4)2(OH,F)3 · 5H2O
Associated Minerals Based on Photo Data:
Dufrénite1 photo of Coeruleolactite associated with Dufrénite on mindat.org.

Related Minerals - Dana Grouping (8th Ed.)Hide,Fe3+)6(PO4)4(OH)8 · 4H2OTric. 1 : P1,Cu)Al6(PO4)4(OH)8 · 4H2OTric. 1 : P1 · 4H2OTric. 1 : P1,Zn)Al6(PO4)4(OH)8 · 4H2OTric. 1 : P1 · 4 H2OTric. 1 : P1 · H2OTric. 1 : P1

Other InformationHide

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.

References for CoeruleolactiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Petersen (1871) Neues Jahrbuch für Mineralogie, Geologie und Paleontologie: 353. [as Cœruleolactin]
Genth (1875) Min. Report Pennsylvania: 143.
Larsen, E.S. (1921) The Microscopic Determination of the Nonopaque Minerals, First edition, USGS Bulletin 679: 59.
Hintze, C. (1933) Handbuch der Mineralogie. Gruyter & Co., Berlin: 1(4.2): 927. [in German]
Palache, C., Berman, H., and Frondel, C. (1951) The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 961.
Fischer, E. (1958) Über die Beziehungen zwischen Coeruleolactit, Planerit, Turkis, Alumochalkosiderit, und Chalkosiderit. Beiträge zur Mineralogie und Petrographie: 6: 182. [Powder Pat., Chemistry].
Fleischer, M. (1958) American Mineralogist: 43: 1224.
Foord, E.E. and Taggart, J.E. (1998) A reexamination of the turquoise group; the mineral aheylite, planerite (redefined), turquoise and coeruleolactite. Mineralogical Magazine: 62: 93-111.
Anthony, J.W., Bideaux, R.A., Bladh, K.W., and Nichols, M.C. (2000) Handbook of Mineralogy, Volume IV. Arsenates, Phosphates, Vanadates. Mineral Data Publishing, Tucson, AZ, 680pp.: 123.
Burke, E.A.J. (2006) A mass discreditation of GQN minerals. The Canadian Mineralogist: 44(6): 1557-1560.

Internet Links for CoeruleolactiteHide

Localities for CoeruleolactiteHide

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.
  • Oruro
    • Dalence Province
      • Huanuni
SEM analyses by Gene Foord, U.S. Geological Survey, done as part of an unpublished study of the turquoise group (analyses copies courtesy of Brian Kosnar)
  • Minas Gerais
    • São José da Safira
Cassedanne, J.P & J.O. (1980): Famous mineral localities: The Cruzeiro mine, past and present. Mineralogical Record 11: 363-367 +370
DR Congo
  • South Kivu
    • Mwenga
Van Wambeke, L. (1971): The uranium-bearing mineral bolivarite: new data and a second occurrence. Mineralogical Magazine 38, 418-423.
  • Rhineland-Palatinate
    • Rhein-Lahn-Kreis
      • Katzenelnbogen
Petersen (1871)
  • Suceava
    • Suceava district
      • Iacobeni (Jakobeny; Jacobeny; Jakabfalva)
  • England
    • Cornwall
      • Linkinhorne
        • Minions
Goley, P. and Williams R. (1995) Cornish Mineral Reference Manual. Endsleigh Publications
  • Pennsylvania
    • Chester Co.
      • East Whiteland Township
Foord, E.E. & Taggart, J.E. (1998): A reexamination of the turquoise group; the mineral aheylite, planerite (redefined), turquoise and coeruleolactite. Mineralogical Magazine, 62, 93-111
  • Navoiy
    • Kokpatas village
Mineraly Uzbekistana(Minerals of the Uzbekistan) - izd."FAN" UzbSSR-vol.1-4 - 1976-1977
Mineral and/or Locality  
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