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Makatite

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About MakatiteHide

Formula:
Na2Si4O8(OH)2 · 4H2O
Colour:
white
Specific Gravity:
1.97 - 2.07
Crystal System:
Monoclinic
Name:
From "emakut", Masai word for "soda", in allusion to the high sodium content of the mineral
This page provides mineralogical data about Makatite.


Classification of MakatiteHide

Approved
Approval Year:
1969
9.EE.45

9 : SILICATES (Germanates)
E : Phyllosilicates
E : Single tetrahedral nets of 6-membered rings connected by octahedral nets or octahedral bands
74.3.5.2

74 : PHYLLOSILICATES Modulated Layers
3 : Modulated Layers with joined strips
14.1.4

14 : Silicates not Containing Aluminum
1 : Silicates of the alkali metals

Physical Properties of MakatiteHide

Colour:
white
Cleavage:
Perfect
Parellel to longitudinal axis
Density:
1.97 - 2.07 g/cm3 (Measured)    2.05 g/cm3 (Calculated)

Optical Data of MakatiteHide

Type:
Biaxial (+)
RI values:
nα = 1.472 - 1.475 nβ = 1.480 nγ = 1.487 - 1.490
2V:
Measured: 70°
Max Birefringence:
δ = 0.015
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
none

Chemical Properties of MakatiteHide

Formula:
Na2Si4O8(OH)2 · 4H2O
Common Impurities:
Ti,Al,Fe,Mg,Ca,K

Crystallography of MakatiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Cell Parameters:
a = 7.388 Å, b = 18.094 Å, c = 9.523 Å
β = 90.64°
Ratio:
a:b:c = 0.408 : 1 : 0.526
Unit Cell V:
1,272.94 ų (Calculated from Unit Cell)
Z:
4

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
5.09 (100)
2.997 (60)
9.04 (55)
2.883 (40)
3.410 (40)
3.125 (35)
8.42 (30)
Comments:
Lake Magadi, Kenya

Type Occurrence of MakatiteHide

Synonyms of MakatiteHide

Other Language Names for MakatiteHide

German:Makatit
Spanish:Makatita

Common AssociatesHide

Associated Minerals Based on Photo Data:
Tuperssuatsiaite15 photos of Makatite associated with Tuperssuatsiaite on mindat.org.
Villiaumite6 photos of Makatite associated with Villiaumite on mindat.org.
Pectolite6 photos of Makatite associated with Pectolite on mindat.org.
Zakharovite4 photos of Makatite associated with Zakharovite on mindat.org.
Amphibole Supergroup3 photos of Makatite associated with Amphibole Supergroup on mindat.org.
Eudialyte2 photos of Makatite associated with Eudialyte on mindat.org.
Microcline2 photos of Makatite associated with Microcline on mindat.org.
Natrolite2 photos of Makatite associated with Natrolite on mindat.org.
Hainite-(Y)2 photos of Makatite associated with Hainite-(Y) on mindat.org.
Fluorapophyllite-(K)2 photos of Makatite associated with Fluorapophyllite-(K) on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.EE.05BementiteMn7Si6O15(OH)8Mon.
9.EE.10BrokenhilliteMn8Si6O15(OH)10Hex. 6mm : P63mc
9.EE.10Pyrosmalite-(Fe)Fe2+8Si6O15(OH,Cl)10Trig. 3m (3 2/m) : P3m1
9.EE.10FriedeliteMn2+8Si6O15(OH,Cl)10Mon. 2/m : B2/m
9.EE.10Pyrosmalite-(Mn)Mn2+8Si6O15(OH,Cl)10Trig.
9.EE.10Mcgillite(Mn,Fe)8Si6O15(OH)8Cl2Mon. 2/m : B2/m
9.EE.15Nelenite(Mn,Fe)16(Si12O30)(OH)14[As3+3O6(OH)3]Mon.
9.EE.15SchalleriteMn2+16As3Si12O36(OH)17Trig. 3m : P3m1
9.EE.20Palygorskite(Mg,Al)5(Si,Al)8O20(OH)2 · 8H2OMon. 2/m : B2/m
9.EE.20TuperssuatsiaiteNa2Fe3Si8O20(OH)2 · 4H2OMon. 2/m : B2/m
9.EE.20YofortieriteMn5Si8O20(OH)2 · 8-9H2OMon. 2/m : B2/m
9.EE.20WindhoekiteCa2Fe3+2.67[Si8O20](OH)4 · 10H2O Mon. 2/m : B2/m
9.EE.25Falcondoite(Ni,Mg)4Si6O15(OH)2 · 6H2OOrth.
9.EE.25LoughliniteNa2Mg3Si6O16 · 8H2OOrth.
9.EE.25SepioliteMg4(Si6O15)(OH)2 · 6H2OOrth. mmm (2/m 2/m 2/m) : Pnna
9.EE.25Kalifersite(K,Na)5Fe3+7Si20O50(OH)6 · 12H2OTric.
9.EE.30GyroliteNaCa16Si23AlO60(OH)8 · 14H2OTric.
9.EE.30OrlymaniteCa4Mn3Si8O20(OH)6 · 2H2OHex.
9.EE.30TungusiteCa4Fe2Si6O15(OH)6
9.EE.35Reyerite(Na,K)2Ca14(Si,Al)24O58(OH)8 · 6H2OTrig.
9.EE.35Truscottite(Ca,Mn)14Si24O58(OH)8 · 2H2OTrig.
9.EE.40NatrosiliteNa2Si2O5Mon.
9.EE.50VarennesiteNa8Mn2Si10O25(OH,Cl)2 · 12H2OOrth.
9.EE.55RaiteNa4Mn2+3Ti0.25Si8O20(OH)2 · 10H2OOrth. 2 2 2 : C2 2 2
9.EE.60IntersiliteNa6Mn2+Ti[Si10O24(OH)](OH)3 · 4H2OMon.
9.EE.65Shafranovskite(Na,K)6(Mn,Fe)3Si9O24 · 6H2OTrig.
9.EE.65ZakharoviteNa4Mn5Si10O24(OH)6 · 6H2OTrig.
9.EE.70ZeophylliteCa13Si10O28(OH)2F8 · 6H2OTrig. 3 : R3
9.EE.75Minehillite(K,Na)2-3Ca28Zn4Al4Si40O112(OH)16Hex.
9.EE.80Fedorite(Na,K)2-3(Ca4Na3)Si16O38(OH,F)2 · 3.5H2OTric. 1 : P1
9.EE.80Martinite(Na,◻,Ca)12Ca4(Si,S,B)14B2O38(OH,Cl)2F2·4H2OTric. 1 : P1
9.EE.85Lalondeite(Na,Ca)6(Ca,Na)3Si16O38(F,OH)2·3H2OTric. 1 : P1

Related Minerals - Dana Grouping (8th Ed.)Hide

74.3.5.1NatrosiliteNa2Si2O5Mon.
74.3.5.3SilinaiteNaLiSi2O5 · 2H2OMon. 2/m

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

14.1.1NatrosiliteNa2Si2O5Mon.
14.1.2ErtixiiteNa2Si4O9
14.1.3RevditeNa16Si16O27(OH)26 · 28H2OMon. 2 : B2
14.1.5MagadiiteNa2Si14O29 · 11H2OMon.
14.1.6KenyaiteNa2Si22O41(OH)8 · 6H2OMon.
14.1.7GrumantiteNa(HSi2O5) · H2OOrth. mm2 : Fdd2
14.1.8SilinaiteNaLiSi2O5 · 2H2OMon. 2/m

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 MakatiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
SHEPPARD, R.A., GUDE, A.J., and HAY, R.L. (1970) Makatite, a new hydrous sodium silicate mineral from Lake Magadi, Kenya. American Mineralogist, 55, 358-366.
Annehed, H., Faelth, L. & Lincoln, F. J. (1982): Crystal structure of synthetic makatite Na2Si4O8(OH)2.4H2O. Zeitschrift für Kristallographie 159, 203-210. [Abstract in American Mineralogist (1983): 68: 852]
KHOMYAKOV, A.P., STEPANOV, V.I., BYKOVA, and NAUMOVA, I.S. (1981) Makatite, Na2Si4O9•5H2O. Doklady Akademii Nauk SSSR, Earth Sciences Section, 255, No., 181-185.
WALENTA, K., ZWIENER, M., and TELLE, R. (1981) Seltene Mineralien aus dem Nephelinit-Steibruch am Höwenegg im Hegau: Makatit und Paulingit. Aufschluss, 32, 130-134 (in German).
HORVÁTH, L., and GAULT, R.G. (1990) The mineralogy of Mont Saint Hilaire. Mineralogical Record, 21, 284-359.
HORVÁTH, L., PFENNINGER HORVÁTH, E., GAULT, R.A., and TARASSOFF, P. (1998) Mineralogy of the Saint Amable sill, Varennes and Saint Amable, Québec, Canada. Mineralogical Record, 29, 83-118.

Internet Links for MakatiteHide

Localities for MakatiteHide

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.
Canada
 
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
Horváth, L and Gault, R.A. (1990), The mineralogy of Mont Saint-Hilaire Quebec. Mineralogical Record: 21: 284-359.
      • Lajemmerais RCM
        • Varennes & St-Amable
HORVÁTH, L., PFENNINGER HORVÁTH, E., GAULT, R.A., and TARASSOFF, P. (1998) Mineralogy of the Saint Amable sill, Varennes and Saint Amable, Québec, Canada. Mineralogical Record, 29, 83 118.
Horváth, L., Pfenninger-Horváth, E., Gault, R. A., & Tarassoff, P. (1998): Mineralogy of the Saint-Amable Sill, Varennes and Saint-Amable, Québec. Mineralogical Record, 29: 83-118.
Germany
 
  • Baden-Württemberg
    • Hegau
      • Immendingen
Tschernich, R. (1992), Zeolites of the World, p.42
Kenya (TL)
 
  • Kajiado County
Sheppard, R.A., Gude, A.J. (1970) Makatite, A new hydrous sodium silicate mineral from Lake Magadi, Kenya. The American Mineralogist, 55, 358-366. HB2/2 (1995).
Namibia
 
  • Khomas Region
    • Windhoek District
      • Aris
von Knorring, O. and Franke, W. (1987) A preliminary note on the mineralogy and geochemistry of the Aris phonolite, SWA/Namibia. Communications of the Geological Survey of South West Africa / Namibia, 3, 65.; Petersen, O.V., Fockenberg, T., Toft, P.C. & Rattay, M. (1997) Natrophosphate from the Aris phonolites, Windhoek, Namibia. Neues Jahrbuch für Mineralogie, Monatshefte 1997, 511-517.; Jost, B.M., Koller, F., Vogel, N., Ulmer, P., and Driesner, T. (2014) Origin of water in miarolitic cavities of the Ariskop phonolite, Namibia. Goldschmidt 2014, 8-13 June, Sacramento, California USA, Abstracts, 1177.; [http://www.koeln.netsurf.de/~w.steffens/aris.htm]
Russia
 
  • Northern Region
    • Murmanskaya Oblast'
      • Khibiny Massif
Pekov, I.V. & Podlesnyi, A.S. (2004): Kukisvumchorr Deposit: Mineralogy of Alkaline Pegmatites and Hydrotermalites. Mineralogical Almanac, vol. 7, 140 pages + xxiv photo's pages
      • Lovozero Massif
[World of Stones 95:5-6, p64]; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
          • Umbozero mine (Umbozerskii mine; Umba Mine)
Pavel M. Kartashov data
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Mineral and/or Locality  
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