decrespignyite-(Y)
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Decrespignyite-(Y) is a copper yttrium rare earth carbonate chloride hydrate; With a simple formula of; Cu(Y, REE)4(CO3)4(OH)5Cl · 2H2O Usually found as single pseudohexagonal platelets, often curved, and regularly measuring 10-50μm in size. It appears as royal blue to turquoise blue in colour, with a pale blue streak, and a pearly to vitreous lustre. Regarded as a supergene mineral which is believed to be formed through by mildly carbonated ground waters precipitating through the ore body. It is often associated with malachite, kamphaugite-(Y), donnayite-(Y) and caysichite-(Y). It is to be
Wikidata facts
- Subclass of
- carbonate and nitrate class of minerals
- Image
- Decrespignyite-(Y) and minor Kamphaugite-(Y).jpg
Show 6 more facts
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 5.CC.35
- crystal system
- monoclinic crystal system
- Nickel-Strunz 9th edition (updated 2009)
- 5.CC.35
- Commons category
- Decrespignyite-(Y)
- IMA Mineral Symbol
- Dcp-Y
- chemical formula
- Y₄Cu(CO₃)₄Cl(OH)₅·2H₂O
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Encyclopedic overview
4 sectionsContents
- Discovery
- Research and Publication
- Naming
- References
Decrespignyite-(Y) is a copper yttrium rare earth carbonate chloride hydrate; With a simple formula of; Cu(Y, REE)4(CO3)4(OH)5Cl · 2H2O Usually found as single pseudohexagonal platelets, often curved, and regularly measuring 10-50μm in size. It appears as royal blue to turquoise blue in colour, with a pale blue streak, and a pearly to vitreous lustre. Regarded as a supergene mineral which is believed to be formed through by mildly carbonated ground waters precipitating through the ore body. It is often associated with malachite, kamphaugite-(Y), donnayite-(Y) and caysichite-(Y). It is to be further noted that all 'donnayite-(Y)' associated with decrespignyite-(Y) at the Paratoo Copper Mine is very likely to be erroneously named at the locality and is probably alicewilsonite-(YLa).
==Discovery==
Excerpted from Wikipedia’s “decrespignyite-(Y)” article, available under the CC BY-SA 4.0 licence.