Raite (original) (raw)

A valid IMA mineral species

About RaiteHide

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Formula:

Mn2+Mn2+2Na2(◻1.75Ti0.25)Si8O20(OH)2(H2O)4 · Na(H2O)6

Colour:

Pale brown to golden-yellow, reddish brown, tan, rose, lavender, bronze

Specific Gravity:

2.32 - 2.39

Crystal System:

Orthorhombic

Name:

Named after the international group of scientists on the 1969-1970 voyage of the papyrus ship, Ra.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:3352:3

3041dff1-cc6c-4143-9416-a825de9db8cc

IMA Classification of RaiteHide

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IMA Formula:

Na3Mn2+3Ti0.25(Si8O20)(OH)2 · 10H2O

Type description reference:

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.

Classification of RaiteHide

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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

Mineral SymbolsHide

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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

Physical Properties of RaiteHide

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Colour:

Pale brown to golden-yellow, reddish brown, tan, rose, lavender, bronze

Cleavage:

Perfect
on {100} {010} {001}

Density:

2.32 - 2.39 g/cm3 (Measured) 2.51 g/cm3 (Calculated)

Optical Data of RaiteHide

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RI values:

_n_α = 1.540(2) _n_β = 1.542(2) _n_γ = 1.550(2)

2V:

Measured: 53° , Calculated: 54°

δ = 0.010

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Optical Extinction:

Z ∧ c = 0-30°.

Comments:

X = nearly colorless; Y = yellowish; Z = golden brown.

Chemistry of RaiteHide

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Mindat Formula:

Mn2+Mn2+2Na2(◻1.75Ti0.25)Si8O20(OH)2(H2O)4 · Na(H2O)6

Common Impurities:

Ca,Ti,Fe,Zr,Al,Nb,Ta,Mg,K,C

Crystallography of RaiteHide

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Crystal System:

Orthorhombic

Class (H-M):

222 - Disphenoidal

Cell Parameters:

a = 30.6 Å, b = 5.31 Å, c = 18.2 Å

Ratio:

a:b:c = 5.763 : 1 : 3.427

Unit Cell V:

2,957.25 ų (Calculated from Unit Cell)

Morphology:

Acicular in radiating masses

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Geological EnvironmentHide

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Geological Setting:

Nepheline rocks

Type Occurrence of RaiteHide

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General Appearance of Type Material:

Acicular crystals 1-2 mm long, 0.02-0.04 mm thick.

Place of Conservation of Type Material:

Institute of Geology, Kola Science Center, Apatity, Russia, numbers 3206, 3271 (type).
Mining Museum, St. Petersburg, Russia, number 1060/1-4 (type).
Fersman Mineralogical Museum, Moscow, Russia, number 74489 (type).
St. Petersburg State University, Department of Geology, St. Petersburg, Russia, number 19047 (type).

Geological Setting of Type Material:

Alkalic pegmatite on walls of fractures and cavities filled by nepheline.

Associated Minerals at Type Locality:

Reference:

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.

Synonyms of RaiteHide

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Other Language Names for RaiteHide

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Relationship of Raite to other SpeciesHide

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Other Members of this group:

Common AssociatesHide

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Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

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Other InformationHide

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Thermal Behaviour:

Before the blowpipe sinters to a gray, bubbly mass, melts at 745° to a gray-brown glass with n = 1.623.

The mineral loses 11.9% to 160°, 13.4% to 300°, 15.5% to 340°. The DTA curve shows an endothermic effect at 160°, and a slight exothermic effect at 700°.

Notes:

Insoluble in H2O. Slowly decomposed by dilute HCl or HNO3 giving skeletal silica.

Health Risks:

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

Internet Links for RaiteHide

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References for RaiteHide

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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).

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.

Pluth, J.J., Smith, J.V., Pushcharovskii, D.Y., Semenov, E.I., Bram, A., Riekel, C., Weber, H.P., 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: 12263-12267.

Pushcharovskii, D.Y., Pekov, I.V., Pluth, J.J., Smith, J., Ferraris, G. Vinogradova, S.A., Arakcheeva, A.V., Soboleva, S.V., Semenov, E.I. (1999) Raite, manganonordite-(Ce), and ferronordite-(Ce) from the Lovozero massif: Crystal structures and mineralogical geochemistry. Crystallography Reports: 44: 565-574.

Localities for RaiteHide

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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

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- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.