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Nchwaningite Mineral Data + |
General Nchwaningite Information |
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| Mn++2SiO3(OH)2·(H2O) | |||
| Molecular Weight = 237.99 gm | |||
| Manganese 46.17 % Mn 59.61 % MnO | |||
| Silicon 11.80 % Si 25.25 % SiO2 | |||
| Hydrogen 1.69 % H 15.14 % H2O | |||
| Oxygen 40.34 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Mn2+2SiO3(OH)2·(H2O) | |||
| In a vug in manganese ore. | |||
| Approved IMA 1995 | |||
| The N,chwaning II Mine, Kalahari Manganese Field, Northern Cape Province, Republic of South Africa. Link to MinDat.org Location Data. | |||
| Named for its locality. | |||
| ICSD 80118 | |||
| IMA1994-002 | |||
| PDF 47-1869 | |||
Search for Nchwaningite Images | |||
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Nchwaningite Crystallography |
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| a:b:c =1.7558:1:0.74 | |||
| a = 12.672, b = 7.217, c = 5.341, Z = 4; V = 488.45 Den(Calc)= 3.24 | |||
| Orthorhombic - PyramidalH-M Symbol (mm2) Space Group: P ca21 | |||
| By Intensity(I/Io): 3.011(1), 2.456(0.8), 2.547(0.8), | |||
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Physical Properties of Nchwaningite |
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| [100] Perfect, [010] Perfect | |||
| Light brown. | |||
| 3.19 | |||
| Transparent | |||
| Brittle - Generally displayed by glasses and most non-metallic minerals. | |||
| Acicular - Occurs as needle-like crystals. | |||
| Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite) | |||
| Spherical - Spherical, rounded aggregates. | |||
| 5.5 - Knife Blade | |||
| Non-fluorescent. | |||
| Vitreous (Glassy) | |||
| white | |||
Optical Properties of Nchwaningite |
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| CI meas= 0.028 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= 0.043 (Good) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2118,KPDmeas= 0.2152,KC= 0.2214 |
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| Biaxial (-), a=1.681, b=1.688, g=1.69, bire=0.0090, 2V(Calc)=56, 2V(Meas)=54.4. | |||
| colorless. | |||
| colorless. | |||
| colorless. | |||
Calculated Properties of Nchwaningite |
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relectron=3.11 gm/cc |
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| Fermion Index = 0.0057 Boson Index = 0.9943 |
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PENchwaningite = 12.20 barns/electron |
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| GRapi = 0 (Gamma Ray American Petroleum Institute Units) Nchwaningite is Not Radioactive |
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Nchwaningite Classification |
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| 65.1.8.1 (65)Inosilicate Single-Width Unbranched Chains, W=1 | |||
| (65.1)with chains P=2 | |||
| (65.1.8)Dana Group | |||
| VIII/F.02-40 VIII - Silicates | |||
| VIII/F - Inosilicates (chain and band) double chains [Si2O6]4- | |||
| VIII/F.02 - Pyroxene group, Orthopyroxene | |||
Other Nchwaningite Information |
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| NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.80,p377-386,1995) OPTIC PROP.(MinRec) | |||
| Links to other databases for Nchwaningite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas 11 - WWW-MINCRYST Search for Nchwaningite using: Visit our Advertisers for Nchwaningite : Translate Nchwaningite Mineral Data : Ask about Nchwaningite here : Print or Cut-and-Paste your Nchwaningite Specimen Label here :
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