Hydroxymcglassonite-(K) (original) (raw)

A valid IMA mineral species

Formula:

KSr4Si8O20(OH) · 8H2O

Crystal System:

Tetragonal

Name:

Named in honor of Mr. James Archer "Jim" McGlasson (b. 18 April 1948, Houston, Texas, USA), exploration geologist and mineral collector. He served as the president of the Tucson Gem and Mineral Society, and on the board of directors of the Friends of Mineralogy. The prefix and suffix follow the naming convention for other apophyllite-group species.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:55309:4

IMA Classification of Hydroxymcglassonite-(K)Hide

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IMA Formula:

KSr4Si8O20(OH) · 8H2O

Classification of Hydroxymcglassonite-(K)Hide

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9.EA.

9 : SILICATES (Germanates)
E : Phyllosilicates
A : Single nets of tetrahedra with 4-, 5-, (6-), and 8-membered rings

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 Hydroxymcglassonite-(K)Hide

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Density:

2.60(3) g/cm3 (Measured) 2.614 g/cm3 (Calculated)

Optical Data of Hydroxymcglassonite-(K)Hide

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RI values:

_n_ω = 1.555(5) _n_ε = 1.567(5)

δ = 0.012

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

Comments:

Absorption O > E.

Chemistry of Hydroxymcglassonite-(K)Hide

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Mindat Formula:

KSr4Si8O20(OH) · 8H2O

Chemical AnalysisHide

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Empirical formulas:

Crystallography of Hydroxymcglassonite-(K)Hide

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Crystal System:

Tetragonal

Cell Parameters:

a = 9.0792(2) Å, c = 16.1551(9) Å

Comment:

Spacegroup: P4/mcn

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Comments:

From Type Description.

Type Occurrence of Hydroxymcglassonite-(K)Hide

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General Appearance of Type Material:

Granular, with grain size <0.05 mm.

Place of Conservation of Type Material:

Type material is deposited in the collections of the University of Arizona Mineral Museum, 1601 E University Blvd, Tucson, AZ 85719, USA, catalogue number 22691 (holotype), and the RRUFF Project, deposition number R200004 (cotype).

Associated Minerals at Type Locality:

Synonyms of Hydroxymcglassonite-(K)Hide

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Relationship of Hydroxymcglassonite-(K) to other SpeciesHide

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Other Members of Apophyllite Group:

Related Minerals - Strunz-mindat GroupingHide

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Other InformationHide

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Notes:

Insoluble in water and HCl.
Raman data similar to that of hydroxylapophyllite-(K) (especially in the O-H stretching region).

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 Hydroxymcglassonite-(K)Hide

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References for Hydroxymcglassonite-(K)Hide

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Reference List:

Yang, Hexiong, Gu, Xiangping, Scott, Michael M. (2022) Hydroxymcglassonite-(K), KSr4Si8O20(OH)·8H2O, the first Sr-bearing member of the apophyllite group, from the Wessels mine, Kalahari Manganese Field, South Africa. American Mineralogist, 107 (9) 1818-1822 doi:10.2138/am-2022-8210

Localities for Hydroxymcglassonite-(K)Hide

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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.