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Pectolite from
N'Chwaning III Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa


Locality type:Mine
Classification
Species:Pectolite
Formula:NaCa2Si3O8(OH)
Chemical Analyses:
Oxide wt%:
12
SiO254.21 %53.87 %
Mn2O3*0.06 %0.00 %
MnO*1.04 %1.51 %
CaO32.20 %31.93 %
SrO0.22 %0.16 %
Na2O9.03 %8.76 %
Li2O (est. stoichiometry0.22 %0.28 %
H2O (by stoichiometry)2.70 %2.69 %
P2O50.02 %0.03 %
ZrO20.04 %0.01 %
Fe2O3*0.01 %0.00 %
NiO0.01 %0.00 %
MgO0.02 %0.03 %
K2O0.01 %0.01 %
Cr2O30.00 %0.01 %
FeO*0.00 %0.03 %
Total:99.79 %99.32 %
Empirical formulas:
1(Na0.94Li~0.05?Sr0.01)(Ca1.91Mn2+0.05Na0.03)[Si3.00O8(OH)]
2(Na0.93Li~0.06?Sr0.01)(Ca1.91Mn2+0.07Na0.02)[Si3.00O8(OH)]
Sample references:
1FKM-173 pt. 41
Frank K. Mazdab collection; sample FKM-173; https://www.rockptx.com/fkm-151-to-fkm-175/#FKM-173
2FKM-173 pt. 40
Frank K. Mazdab collection; sample FKM-173; https://www.rockptx.com/fkm-151-to-fkm-175/#FKM-173
Comments:abundant crystals within quartz segregations in sugilite-rich rock
Luminescent properties:cathodoluminescence: pale yellow CL cores and bright yellow CL thin rims
Confirmation
Validity:Confirmed
Confirmation Methods:EPMA
Associated Minerals Based on Photo Data:
Sugilite5
Aluminosugilite3
Quartz3
Namansilite2
Hematite2
Norrishite2
Braunite-II2
Taniajacoite2
Data
Mineral Data:Click here to view Pectolite data
Locality Data:Click here to view N'Chwaning III Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
Data Identifiers
Mindat Occurrence Record ID:1253917
Long-form Identifier:1:3:1253917:0
GUID (UUID V4):0
Nearest other occurrences of Pectolite
1.8km (1.1 miles) ⓘN'Chwaning II Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
2.5km (1.5 miles) ⓘWessels Mine, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
References
Frank K. Mazdab collection (thin section FKM-173
Gu, Xiangping, Yang, Hexiong, Xie, Xiande, van Nieuwenhuizen, Jaco J., Downs, Robert T., Evans, Stanley H. (2019) Lipuite, a new manganese phyllosilicate mineral from the N'Chwaning III mine, Kalahari Manganese Fields, South Africa. Mineralogical Magazine, 83 (5) 645-654 doi:10.1180/mgm.2019.12
 
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