Hydroxymcglassonite-(K) R200004
Name: Hydroxymcglassonite-(K)
RRUFF ID: R200004
Ideal Chemistry: KSr4Si8O20(OH)·8H2O
Locality: Wessels mine, Kalahari manganese field, Northern Cape Province, South Africa
Source: Jaco and Tania Janse van Nieuwenhuizen [view label]
Owner: RRUFF
Description: Colorless tiny crystals (<50 microns) intergrowth with blue granular meieranite (R140947), massive pale green sugilite, prismatic grey aegirine and bladed white pectolite. Cotype sample
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Mineral Group: [ Apophyllite (7) ]
CHEMISTRY 
RRUFF ID: R200004.2
Sample Description: Microprobe Fragment
Measured Chemistry: K1.01(Sr2.99Ca1.03)Σ=4.02Si7.99O20(OH)·8H2O (Based on 29 O atoms)
Microprobe Data File: [ Download Excel File ]
RAMAN SPECTRUM 
RRUFF ID:
Sample Description: Unoriented Raman on the primary sample
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Raman Data (Processed)
RRUFF File
Raman Data (RAW) View Graph
RRUFF File
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BROAD SCAN WITH SPECTRAL ARTIFACTS
RRUFF ID: R200004
Wavelength:
Sample Description: Unoriented Raman on the primary sample
Instrument settings: Not collected by RRUFF: 488nm @ 100% of mW
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Raman Data (Processed)
RRUFF File
POWDER DIFFRACTION 
RRUFF ID: R200004
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 9.0792(2)Å    b: 9.0792(2)Å    c: 16.1551(9)Å
alpha: 90°    beta: 90°    gamma: 90°   Volume: 1331.70(10)Å3    Crystal System: tetragonal
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REFERENCES for Hydroxymcglassonite-(K)

Miyawaki R, Hatert F, Pasero M, Mills S J (2021) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 59, European Journal of Mineralogy, 59, 139-143   [view file]

Yang H, Gu X, Scott M 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, 1818-1822