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Turquoise Mine, Cripple Creek, Cripple Creek District, Teller Co., Colorado, USA
© 2002 John H. Betts
| System: | Triclinic | Colour: | Milk-white, light blue |
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| Hardness: | 5 | ||
| 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. | |||
Classification of Coeruleolactite | |||||||
| IMA status: | Discredited 2006 | ||||||
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| Dana 8th edition ID: | 42.9.3.2 42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN 9 : (AB)7(XO4)4Zq·xH2O | ||||||
| mindat.org URL: | http://www.mindat.org/min-1103.html Please feel free to link to this page. | ||||||
Occurrences of Coeruleolactite | |||||||
| Geological Setting: | Oxidized zones of iron deposits; pegmatite. | ||||||
Physical Properties of Coeruleolactite | |||||||
| Lustre: | Vitreous, Waxy | ||||||
| Diaphaneity (Transparency): | Translucent | ||||||
| Colour: | Milk-white, light blue | ||||||
| Streak: | White | ||||||
| Hardness (Mohs): | 5 | ||||||
| Fracture: | Irregular/Uneven, Conchoidal | ||||||
| Density (measured): | 2.55 - 2.7 g/cm3 | ||||||
Crystallography of Coeruleolactite | |||||||
| Crystal System: | Triclinic | ||||||
| Class (H-M): | 1 - Pinacoidal | ||||||
| Space Group: | P1 | ||||||
| Cell Parameters: | a = 7.529Å, b = 9.951Å, c = 7.782Å α = 112.51°, β = 116.54°, γ = 68.57° | ||||||
| Ratio: | a:b:c = 0.757 : 1 : 0.782 | ||||||
| Unit Cell Volume: | V 468.35 ų (Calculated from Unit Cell) | ||||||
| Z: | 1 | ||||||
| Morphology: | Microcrystalline to cryptocrystalline; fibrous veinlets, botryoidal aggregates, and crusts. | ||||||
Optical Data of Coeruleolactite | |||||||
| Type: | Uniaxial (+) | ||||||
| RI values: | nω = 1.580 nε = 1.588 | ||||||
| Maximum Birefringence: | δ = 0.008 Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration. | ||||||
| Surface Relief: | Moderate | ||||||
Relationship of Coeruleolactite to other Species | |||||||
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Other Names for Coeruleolactite | |||||||
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Other Information | |||||||
| Other Information: | Soluble in acids and in alkalies. | ||||||
| Health Warning: | No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care. | ||||||
References for Coeruleolactite | |||||||
| Reference List: | Petersen (1871) Neues Jahrbuch für Mineralogie, Geologie und Paleontologie, Heidelberg, Stuttgart: 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) Hadbuch der Mineralogie. Gruyter & Co., Berlin: 1(4.2): 927 (in German). Palache, C., Berman, H., & 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. Beiträge zur Mineralogie und Petrographie 6 (1958), 182 [Powder Pat., Chemistry]. American Mineralogist (1958): 43: 1224 [Abstract]. 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. 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. | ||||||
Articles/Blogs about Coeruleolactite | |||||||
Internet Links for Coeruleolactite | |||||||
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Localities for Coeruleolactite | |||||||