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Raite

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Ra II
Formula:
Na4Mn32+Ti0.25Si8O20(OH)2 · 10H2O
System:
Orthorhombic
Colour:
Pale brown to ...
Hardness:
3
Name:
Named after the international group of scientists on the 1969-1970 voyage of the papyrus ship, Ra.
Structurally related to tuperssuatsiaite and windhoekite.

Classification of Raite

Approved
9.EE.55

9 : SILICATES (Germanates)
E : Phyllosilicates
E : Single tetrahedral nets of 6-membered rings connected by octahedral nets or octahedral bands
78.5.8.1

78 : Unclassified Silicates
5 :
14.18.30

14 : Silicates not Containing Aluminum
18 : Silicates of Mn and Na, K, Mg, Ca or Fe
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http://www.mindat.org/min-3352.html
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Type Occurrence of Raite

Year of Discovery:
1973

Occurrences of Raite

Geological Setting:
Nepheline rocks

Physical Properties of Raite

Vitreous, Silky
Diaphaneity (Transparency):
Transparent
Colour:
Pale brown to golden-yellow, reddish brown, tan, rose, lavender, bronze
Streak:
Yellow
Hardness (Mohs):
3
Tenacity:
Brittle
Cleavage:
Perfect
on {100} {010} {001}
Density:
2.32 - 2.39 g/cm3 (Measured)    2.51 g/cm3 (Calculated)

Crystallography of Raite

Crystal System:
Orthorhombic
Class (H-M):
2 2 2 - Disphenoidal
Space Group:
C2 2 2
Cell Parameters:
a = 30.6Å, b = 5.31Å, c = 18.2Å
Ratio:
a:b:c = 5.763 : 1 : 3.427
Unit Cell Volume:
V 2,957.25 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Acicular in radiating masses

Optical Data of Raite

Type:
Biaxial (+)
RI values:
nα = 1.540(2) nβ = 1.542(2) nγ = 1.550(2)
2V:
Measured: 53° , Calculated: 54°
Max Birefringence:
δ = 0.010
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
weak
Pleochroism:
Visible
Comments:
X= nearly colorless
Y= yellowish
Z= golden brown

Chemical Properties of Raite

Formula:
Na4Mn32+Ti0.25Si8O20(OH)2 · 10H2O
Essential elements:
All elements listed in formula:
Common Impurities:
Ca,Ti,Fe,Zr,Al,Nb,Ta,Mg,K,C

Relationship of Raite to other Species

9.EE.05BementiteMn7Si6O15(OH)8
9.EE.10BrokenhilliteMn8Si6O15(OH)10
9.EE.10Pyrosmalite-(Fe)(Fe,Mn)8Si6O15(OH,Cl)10
9.EE.10Friedelite(Mn,Fe)8Si6O15(OH,Cl)10
9.EE.10Pyrosmalite-(Mn)(Mn,Fe)8Si6O15(OH,Cl)10
9.EE.10Mcgillite(Mn,Fe)8Si6O15(OH)8Cl2
9.EE.15Nelenite(Mn,Fe)16(Si12O30)(OH)14[As33+O6(OH)3]
9.EE.15Schallerite(Mn,Fe)16Si12As3O36(OH)17
9.EE.20Palygorskite(Mg,Al)5(Si,Al)8O20(OH)2 · 8H2O
9.EE.20TuperssuatsiaiteNa2Fe3Si8O20(OH)2 · 4H2O
9.EE.20YofortieriteMn5Si8O20(OH)2 · 8-9H2O
9.EE.20WindhoekiteCa2Fe3+2.67[Si8O20](OH)4 · 10H2O
9.EE.25Falcondoite(Ni,Mg)4Si6O15(OH)2 · 6H2O
9.EE.25LoughliniteNa2Mg3Si6O16 · 8H2O
9.EE.25SepioliteMg4(Si6O15)(OH)2 · 6H2O
9.EE.25Kalifersite(K,Na)5Fe73+Si20O50(OH)6 · 12H2O
9.EE.30GyroliteNaCa16Si23AlO60(OH)8 · 14H2O
9.EE.30OrlymaniteCa4Mn3Si8O20(OH)6 · 2H2O
9.EE.30TungusiteCa4Fe2Si6O15(OH)6
9.EE.35Reyerite(Na,K)2Ca14(Si,Al)24O58(OH)8 · 6H2O
9.EE.35Truscottite(Ca,Mn)14Si24O58(OH)8 · 2H2O
9.EE.40NatrosiliteNa2Si2O5
9.EE.45MakatiteNa2Si4O8(OH)2 · 4H2O
9.EE.50VarennesiteNa8Mn2Si10O25(OH,Cl)2 · 12H2O
9.EE.60IntersiliteNa6Mn2+Ti[Si10O24(OH)](OH)3 · 4H2O
9.EE.65Shafranovskite(Na,K)6(Mn,Fe)3Si9O24 · 6H2O
9.EE.65ZakharoviteNa4Mn5Si10O24(OH)6 · 6H2O
9.EE.70ZeophylliteCa13(Si10O28)F10 · 6H2O
9.EE.75Minehillite(K,Na)2-3Ca28Zn4Al4Si40O112(OH)16
9.EE.80Fedorite(Na,K)2-3(Ca4Na3)Si16O38(OH,F)2 · 3.5H2O
9.EE.80Martinite(Na,◻,Ca)12Ca4(Si,S,B)14B2O38(OH,Cl)2F2·4H2O
9.EE.85Lalondeite(Na,Ca)6(Ca,Na)3Si16O38(F,OH)2·3H2O
14.18.1Nambulite(Li,Na)Mn4Si5O14(OH)
14.18.2Natronambulite(Na,Li)(Mn,Ca)4Si5O14OH
14.18.3ZakharoviteNa4Mn5Si10O24(OH)6 · 6H2O
14.18.4NorrishiteKLiMn23+(Si4O10)O2
14.18.5Shafranovskite(Na,K)6(Mn,Fe)3Si9O24 · 6H2O
14.18.6AbswurmbachiteCuMn63+(SiO4)O8
14.18.7Donpeacorite(Mn2+,Mg)Mg[SiO3]2
14.18.8KanoiteMn2+(Mg,Mn2+)Si2O6
14.18.9Caryopilite(Mn,Mg)3(Si2O5)(OH)4
14.18.10Gonyerite(Mn2+,Mg)5Fe3+(Fe3+Si3O10)(OH)8
14.18.11Tirodite
14.18.12Manganhumite(Mn2+,Mg)7(SiO4)3(OH)2
14.18.13BustamiteCaMn2+(Si2O6)
14.18.14GlaucochroiteCaMn2+SiO4
14.18.15Truscottite(Ca,Mn)14Si24O58(OH)8 · 2H2O
14.18.16SantaclaraiteCaMn4[Si5O14OH](OH) · H2O
14.18.17FerrobustamiteCaFe2+(Si2O6)
14.18.18JohannseniteCaMn2+Si2O6
14.18.19NeltneriteCaMn63+(SiO4)O8
14.18.20OrlymaniteCa4Mn3Si8O20(OH)6 · 2H2O
14.18.21InesiteCa2(Mn,Fe)7Si10O28(OH)2 · 5H2O
14.18.22OrientiteCa8Mn103+(SiO4)3(Si3O10)3(OH)10 · 4H2O
14.18.23RuiziteCa2Mn23+[(OH)2|H2Si4O13] · 2H2O
14.18.24BostwickiteCaMn6Si3O16 · 7H2O
14.18.25KittatinnyiteCa2Mn2Mn(SiO4)2(OH)4 · 9H2O
14.18.26LithiomarsturiteLiCa2Mn2Si5O14(OH)
14.18.27SéranditeNa(Mn2+,Ca)2(HSi3O9)
14.18.28KvanefjelditeNa4(Ca,Mn)(Si3O7)2(OH)2
14.18.29MarsturiteNaCaMn3Si5O14(OH)
14.18.31Richterite{Na}{CaNa}{Mg5}(Si8O22)(OH)2
14.18.32Byelorussite-(Ce)NaBa2Ce2MnTi2[Si4O12]2O2(F,OH) · H2O
14.18.33Deerite(Fe,Mn)6(Fe,Al)3[Si6O17]O3(OH)5
14.18.34Calderite(Mn2+,Ca)3(Fe3+,Al)2(SiO4)3
14.18.35PyroxmangiteMnSiO3
14.18.36Dannemorite
14.18.37Neotocite(Mn,Fe,Mg)SiO3 · H2O
14.18.38BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
14.18.39ManganbabingtoniteCa2(Mn,Fe)FeSi5O14(OH)
14.18.40ÖrebroiteMn32+(Sb5+,Fe3+)(SiO4)(O,OH)3

Other Names for Raite

Name in Other Languages:
German:Rait
Russian:Раит
Spanish:Raita

Other Information

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 Raite

Reference List:
Mer'kov, A.N., Bussen, I.V., Goiko, E.A., Kul'chitskaya, E.A., Men'shikov, Yu.P., and Nedorezova, A.P. (1973) Raite and zorite - new minerals from the Lovozero Tundra. Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 102(1): 54-62 (in Russian).

American Mineralogist (1973): 58: 1113.

Mineralogical Record (199: 10: 99.

Proceedings of the National Academy of Science (USA) (1997): 94: 12263-12267.

Internet Links for Raite

Specimens:
The following Raite specimens are currently listed for sale on minfind.com.

Localities for Raite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Canada
 
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
HORVÁTH, L., and GAULT, R.A. (1990) The mineralogy of Mont Saint-Hilaire. Mineralogical Record, 21, 284-359.
      • Lajemmerais RCM
        • Varennes & St-Amable
          • Saint-Amable sill
Horváth collection XRD & WDS confirmed
Russia
 
  • Northern Region
    • Murmanskaja Oblast'
      • Kola Peninsula
www.koeln.netsurf.de/~w.steffens/khib.htm
        • Lovozero Massif
          • Alluaiv Mt
            • Umbozero mine (Umbozerskii mine; Umba Mine)
Pavel M. Kartashov data
          • Karnasurt Mt
ZVMO,(1973) 102, 54-62; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; Zubkova, N. V., Pekov, I. V., Pushcharovsky, D. Y., & Chukanov, N. V. (2009). The crystal structure and refined formula of mountainite, KNa2Ca2 [Si8O19 (OH)]⊙ 6 H2O. Zeitschrift für Kristallographie, 224(8), 389-396.; Pluth, J. J., Smith, J. V., Pushcharovsky, D. Y., Semenov, E. I., Bram, A., Riekel, C., ... & Broach, R. W. (1997). Third-generation synchrotron x-ray diffraction of 6-μm crystal of raite,≈ Na3Mn3Ti0. 25Si8O20 (OH) 2⋅ 10H2O, opens up new chemistry and physics of low-temperature minerals. Proceedings of the National Academy of Sciences, 94(23), 12263-12267.
Mineral and/or Locality  
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