Hydroxymcglassonite-(K) R200004

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Record 680 of 1179

		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:	K_1.01(Sr_2.99Ca_1.03)_Σ=4.02Si_7.99O₂₀(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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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