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Lourenswalsite

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About LourenswalsiteHide

Dr. Lourens Wals
Formula:
(K,Ba)2(Ti,Mg,Ca,Fe)4(Si,Al,Fe)6O14(OH)12
Crystal System:
Hexagonal
Name:
Named after Dr. Lourens Wals, mineral collector of Turnhout, Belgium.
This page provides mineralogical data about Lourenswalsite.


Classification of LourenswalsiteHide

Approved
9.EJ.05

9 : SILICATES (Germanates)
E : Phyllosilicates
J : Unclassified phyllosilicates
61.2.3.1

61 : CYCLOSILICATES Six-Membered Rings
2 : Six-Membered Rings with Al substituted rings
16.14.7

16 : Silicates Containing Aluminum and other Metals
14 : Aluminosilicates of Ti, Zr, Sn and Pb

Optical Data of LourenswalsiteHide

Type:
Biaxial (-)
RI values:
nα = 1.815 nβ = 1.840 nγ = 1.840
Max Birefringence:
δ = 0.025
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
r > v

Chemical Properties of LourenswalsiteHide

Formula:
(K,Ba)2(Ti,Mg,Ca,Fe)4(Si,Al,Fe)6O14(OH)12
IMA Formula:
(K,Ba)2Ti4(Si,Al)6O14(OH)12
Common Impurities:
Al,H2O

Crystallography of LourenswalsiteHide

Crystal System:
Hexagonal
Cell Parameters:
a = 5.24 Å, c = 20.49 Å
Ratio:
a:c = 1 : 3.91
Unit Cell V:
487.23 ų (Calculated from Unit Cell)

Type Occurrence of LourenswalsiteHide

Synonyms of LourenswalsiteHide

Other Language Names for LourenswalsiteHide

Simplified Chinese:羟硅钾钛石

Related Minerals - Nickel-Strunz GroupingHide

9.EJ.10MiddendorfiteK3Na2Mn5Si12(O,OH)36 · 2H2OMon.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

16.14.1ZoriteNa8(Ti,Nb)5(Si6O17)2(OH,O)5 · 14H2OOrth.
16.14.2VinogradoviteNa4Ti4(Si2O6)2[(Si,Al)4O10]O4 · (H2O,Na,K)3Mon. 2/m : B2/b
16.14.3RhöniteCa2(Mg,Fe2+,Fe3+,Ti)6[O2|(Si,Al)6O18]Tric. 1 : P1
16.14.4Kaersutite{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2 Mon.
16.14.5Ferro-kaersutite{Na}{Ca2}{Fe2+3AlTi}(Al2Si6O22)O2Mon.
16.14.6JonesiteBa4(K,Na)2Ti4Al2(Si3O9)2(SiO4)4O2 · 6H2OOrth.
16.14.8Labuntsovite-MnNa4K4(Ba,K)2Mn2+(Ti,Nb)8(Si4O12)4(O,OH)8 · 10-12H2OMon.
16.14.9KimzeyiteCa3(Zr,Ti)2((Si,Al,Fe3+)O4)3Iso.
16.14.10EllenbergeriteMg6(Mg,Ti,Zr,◻)2(Al,Mg)6Si8O28(OH)10Hex.
16.14.11Carlosturanite(Mg,Fe,Ti)21(Si,Al)12O28(OH)34•H2OMon.
16.14.12EakeriteCa2SnAl2Si6O18(OH)2 · 2H2OMon.
16.14.13PlumalsitePb4Al2(SiO3)7
16.14.14WickenburgiteCaPb3Al2Si10O24(OH)6Trig. 3m : P3 1c
16.14.15MaricopaitePb7Ca2(Si,Al)48O100 · 32H2OOrth.
16.14.16Hancockite{CaPb}{Al2Fe3+}(Si2O7)(SiO4)O(OH)Mon.
16.14.17BurckhardtitePb2(Fe3+Te6+)[AlSi3O8]O6Trig. 3m (3 2/m) : P3 1m
16.14.18MathewrogersitePb7FeAl3GeSi12O36(OH,H2O)6Trig.

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for LourenswalsiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Appleman, D.E., Evan, H.T., Jr., Nord, G.L., Dwornik, E.J. and Milton, Charles (1987): DeLindeite and lourenswalsite, two new titanosilicates from the Magnet Cove region, Arkansas. Mineralogical Magazine: 51: 417-425.
American Mineralogist (1988): 73: 1493-1494.

Internet Links for LourenswalsiteHide

Localities for LourenswalsiteHide

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

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
USA (TL)
 
  • Arkansas
    • Hot Spring Co.
      • Magnet Cove
Rocks & Min.:63:109.
Mineral and/or Locality  
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