Seidite-(Ce) (original) (raw)

A valid IMA mineral species

About Seidite-(Ce)Hide

This section is currently hidden. Click the show button to view.

Formula:

Na4(Ce,Sr)2[TiSi8O18(OH)2](O,OH,F)4 · 5H2O

Colour:

Bright yellow, pinkish yellow, creamy-white

Crystal System:

Monoclinic

Name:

Named after Seidozero, literally Lake Seid, the central lake in the Lovozero complex.

This page provides mineralogical data about Seidite-(Ce).

Unique IdentifiersHide

This section is currently hidden. Click the show button to view.

Long-form identifier:

mindat:1:1:7284:3

16f100d0-0d2d-493c-83fd-65f30db4cd30

IMA Classification of Seidite-(Ce)Hide

This section is currently hidden. Click the show button to view.

IMA Formula:

Na4(Ce,Sr)2TiSi8O18(O,OH,F)6 · 5H2O

Type description reference:

Khomyakov, A. P., Ferraris, G., Belluso, E., Britvin, S. N., Nechelyustov, G. N., Soboleva, S. V. (1998) Seidite-(Ce), Na4SrCeTiSi8O22F·5H2O, a new mineral with zeolitic properties. Zapiski Vserossijskogo Mineralogicheskogo Obshchestva, 127 (4) 94-100

Classification of Seidite-(Ce)Hide

This section is currently hidden. Click the show button to view.

9.DJ.20

9 : SILICATES (Germanates)
D : Inosilicates
J : Inosilicates with 4-periodic double and triple chains

Mineral SymbolsHide

This section is currently hidden. Click the show button to view.

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

Physical Properties of Seidite-(Ce)Hide

This section is currently hidden. Click the show button to view.

Comment:

Resinous or dull in some specimens

Colour:

Bright yellow, pinkish yellow, creamy-white

Cleavage:

Perfect
Perfect {100} and less perfect {001}

Fracture:

Splintery, Fibrous

Density:

2.76 g/cm3 (Measured) 2.73 g/cm3 (Calculated)

Optical Data of Seidite-(Ce)Hide

This section is currently hidden. Click the show button to view.

RI values:

_n_α = 1.542(2) _n_β = 1.569(2) _n_γ = 1.571(2)

2V:

Measured: 28° (1), Calculated: 31°

δ = 0.029

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

Comments:

positive elongation, X ≈ a, Y ≈ c, Z ≈ b.

Chemistry of Seidite-(Ce)Hide

This section is currently hidden. Click the show button to view.

Mindat Formula:

Na4(Ce,Sr)2[TiSi8O18(OH)2](O,OH,F)4 · 5H2O

Crystallography of Seidite-(Ce)Hide

This section is currently hidden. Click the show button to view.

Crystal System:

Monoclinic

Class (H-M):

2/m - Prismatic

Cell Parameters:

a = 24.71(1) Å, b = 7.186(3) Å, c = 14.47(2) Å
β = 95.25(10)°

Ratio:

a:b:c = 3.439 : 1 : 2.014

Unit Cell V:

2,558.60 ų (Calculated from Unit Cell)

Morphology:

Type material: individual fibers are up to 0.05 mm thick, elongate [010], and flattened {100}.

Crystal StructureHide

This section is currently hidden. Click the show button to view.

Load
Unit Cell |Unit Cell Packed
2x2x2 |3x3x3 |4x4x4

Show
Big Balls |Small Balls |Just Balls |Spacefill
Polyhedra Off |Si Polyhedra |All Polyhedra
Remove metal-metal sticks

Display Options
Black Background |White Background
Perspective On |Perspective Off
2D |Stereo |Red-Blue |Red-Cyan

View
CIF File Best |x |y |z |a |b |c

Rotation
Stop |Start

Labels
Console Off |On |Grey |Yellow

ID	Species	Reference	Link	Year	Locality	Pressure (GPa)	Temp (K)
0005884	Seidite-(Ce)	Ferraris G, Belluso E, Gula A, Soboleva S V, Khomyakov A P (2003) The crystal structure of seidite-(Ce), Na4(Ce,Sr)2{Ti(OH)2(Si8O18)}(O,OH,F)4.5H2O, a modular microporous titanosilicate of the rhodesite group The Canadian Mineralogist 41 1183-1192		2003	0	293

CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

This section is currently hidden. Click the show button to view.

Powder Diffraction Data:

Geological EnvironmentHide

This section is currently hidden. Click the show button to view.

Type Occurrence of Seidite-(Ce)Hide

This section is currently hidden. Click the show button to view.

General Appearance of Type Material:

Bright yellow, pinkish yellow, or cream-colored spherulites to 1 cm, in cavernous natrolite.

Place of Conservation of Type Material:

Museum of the St. Petersburg Mining Institute, Russia.

Geological Setting of Type Material:

Associated Minerals at Type Locality:

Reference:

Khomyakov, A.P., Ferraris, G., Belluso, E., Britvin, S.N., Nechelyustov, G.N., Soboleva, S.V. (1998) Seidite-(Ce), Na4SrCeTiSi8O22F·5H2O, a new mineral with zeolitic properties. Zapiski Vserossijskogo Mineralogicheskogo Obshchestva: 127(4): 94-100.

Synonyms of Seidite-(Ce)Hide

This section is currently hidden. Click the show button to view.

Other Language Names for Seidite-(Ce)Hide

This section is currently hidden. Click the show button to view.

Common AssociatesHide

This section is currently hidden. Click the show button to view.

Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

This section is currently hidden. Click the show button to view.

Fluorescence of Seidite-(Ce)Hide

This section is currently hidden. Click the show button to view.

Other InformationHide

This section is currently hidden. Click the show button to view.

Thermal Behaviour:

The DTA curve has a strong endotherm at 180°C (dehydration) and weak ones at 650, 740, and 840°C (incongruent melting). Weight loss between 20 and 200°C is 8.2%, and total loss to 1000°C is 11.1 wt%. Readily rehydrates after heating to 300°C.

Notes:

Readily soluble in 10% HCl or HNO3, reacts with H2O.

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 Seidite-(Ce)Hide

This section is currently hidden. Click the show button to view.

References for Seidite-(Ce)Hide

This section is currently hidden. Click the show button to view.

Reference List:

Khomyakov, A. P., Ferraris, G., Belluso, E., Britvin, S. N., Nechelyustov, G. N., Soboleva, S. V. (1998) Seidite-(Ce), Na4SrCeTiSi8O22F·5H2O, a new mineral with zeolitic properties. Zapiski Vserossijskogo Mineralogicheskogo Obshchestva, 127 (4) 94-100

Ferraris, G., Belluso, E., Gula, A., Soboleva, S. V., Khomyakov, A. P. (2003) The crystal structure of seidite-(Ce), Na4(Ce,Sr)2{Ti(OH)2(Si8O18)}(O,OH,F)4·5H2O, a modular microporous titanosilicate of the rhodesite group. The Canadian Mineralogist, 41 (5) 1183-1192 doi:10.2113/gscanmin.41.5.1183

Localities for Seidite-(Ce)Hide

This section is currently hidden. Click the show button to view.

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 section is currently hidden. Click the show button to view.

- 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.