Merlinoite (original) (raw)

A valid IMA mineral species

About MerlinoiteHide

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Formula:

(K,Na)5(Ca,Ba)2Al9Si23O64 · 23H2O

Specific Gravity:

2.14 - 2.27

Crystal System:

Orthorhombic

Name:

Named in 1977 by Elio Passaglia, D. Pongiluppi and R. Rinaldi in honour of Stefano Merlino (1938 - ), Professor of crystallography, University of Pisa, Italy.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:2651:8

3da70ecc-f226-4c9d-ad07-0b15069d5c4d

IMA Classification of MerlinoiteHide

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IMA Formula:

K5Ca2(Si23Al9)O64 · 24H2O

Type description reference:

Classification of MerlinoiteHide

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9.GC.15

9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H2O; zeolite family
C : Chains of doubly-connected 4-membered rings

77.1.3.11

77 : TECTOSILICATES Zeolites
1 : Zeolite group - True zeolites

16.12.14

16 : Silicates Containing Aluminum and other Metals
12 : Aluminosilicates of Sr, Ba and Zn

Mineral SymbolsHide

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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Physical Properties of MerlinoiteHide

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Density:

2.14 - 2.27 g/cm3 (Measured) 2.21(2) g/cm3 (Calculated)

Optical Data of MerlinoiteHide

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RI values:

_n_α = 1.499 _n_β = 1.500 _n_γ = 1.501

2V:

Measured: 56° , Calculated: 88°

δ = 0.002

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Optical Extinction:

X = b; Y = c; Z = a.

Chemistry of MerlinoiteHide

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Mindat Formula:

(K,Na)5(Ca,Ba)2Al9Si23O64 · 23H2O

Crystallography of MerlinoiteHide

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Crystal System:

Orthorhombic

Class (H-M):

m m m _(_2/_m_2/_m_2/m ) - Dipyramidal

Cell Parameters:

a = 14.116(7) Å, b = 14.229(6) Å, c = 9.946(6) Å

Ratio:

a:b:c = 0.992 : 1 : 0.699

Unit Cell V:

1,997.72 ų (Calculated from Unit Cell)

Morphology:

Rectangular prisms formed by the {100} and {010} pinacoids, terminated by two orthorhombic prisms with different development. Radiating fibrous spheroidal aggregates.

Comment:

Pseudo-tetragonal.

Crystal StructureHide

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X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Comments:

Cupaello Quarry, Lazio, Italy. Data from the type description.

Geological EnvironmentHide

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Type Occurrence of MerlinoiteHide

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General Appearance of Type Material:

Spheroidal radial aggregates with a diameter less than 1 mm.

Place of Conservation of Type Material:

Municipal Museum of Natural History, Milan, 18078; University of Modena, Modena, Italy; Natural History Museum, Paris, France; National Museum of Natural History, Washington, D.C., USA, 137087.

Geological Setting of Type Material:

In cavities in kalsilite-melilite rock.

Associated Minerals at Type Locality:

Reference:

Passaglia, E., Pongiluppi, D., Rinaldi, R. (1977) Merlinoite, a new mineral of the zeolite group. Neues Jahrbuch für Mineralogie, Monatshefte: 355-364.

Synonyms of MerlinoiteHide

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Other Language Names for MerlinoiteHide

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Relationship of Merlinoite to other SpeciesHide

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Other Members of this group:

Common AssociatesHide

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Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

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Other InformationHide

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IR Spectrum:

The IR spectrum distinguishes between merlinoite and phillipsite.

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 MerlinoiteHide

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References for MerlinoiteHide

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Reference List:

Coombs, Douglas S., Alberti, Alberto, Armbruster, Thomas, Artioli, Gilberto, Colella, Carmine, Galli, Ermanno, Grice, Joel D., Liebau, Friedrich, Mandarino, Joseph A., Minato, Hideo, Nickel, Ernest H., Passaglia, Elio, Peacor, Donald R., Quartieri, Simona, Rinaldi, Romano, Ross, Malcolm I., Sheppard, Richard A., Tillmanns, Ekkehart, Vezzalini, Giovanna (1997) Recommended nomenclature for zeolite minerals; report of the Subcommittee on Zeolites of the International Mineralogical Association, Commission on New Minerals and Mineral Names. The Canadian Mineralogist, 35 (6) 1571-1606

Gatta, G. Diego, Rotiroti, Nicola, Bersani, Danilo, Bellatreccia, Fabio, Ventura, Giancarlo Della, Rizzato, Silvia (2015) A multi-methodological study of the (K,Ca)-variety of the zeolite merlinoite. Mineralogical Magazine, 79 (7) 1755-1767 doi:10.1180/minmag.2015.079.7.03

Localities for MerlinoiteHide

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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

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- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - 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). 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.