Ivanyukite-Na-C
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Formula:
Na2Ti4(SiO4)3(OH)2O2 · 6H2O
System:
Isometric
Colour:
Pale orange
Lustre:
Vitreous
Hardness:
4
Member of:
Name:
Named in honor of Gregory Yur’evich Ivanyuk, Russian mineralogist and petrologist, head of the Laboratory of Self-Organized Mineral Systems in the Geological Institute of the Kola Science Centre of the Russian Academy of Sciences
A polytype of Ivanyukite-Na
Formed by partial hydration of ivanyukite-Na-T.
The structure of all ivanyukites is described as a 3D framework of the pharmacosiderite type; it is based on of four edge-sharing TiO6 octahedra connected by the silicate tetrahedra. It contains 8-membered rings defininng channels with an effective width of 3.5 Å. Na, K and water reside within the channels.
Formed by partial hydration of ivanyukite-Na-T.
The structure of all ivanyukites is described as a 3D framework of the pharmacosiderite type; it is based on of four edge-sharing TiO6 octahedra connected by the silicate tetrahedra. It contains 8-membered rings defininng channels with an effective width of 3.5 Å. Na, K and water reside within the channels.
Classification of Ivanyukite-Na-C
Approved
Approval Year:
2007
Physical Properties of Ivanyukite-Na-C
Vitreous
Diaphaneity (Transparency):
Transparent
Colour:
Pale orange
Streak:
White
Hardness (Mohs):
4
Comment:
ca. 4
Tenacity:
Brittle
Cleavage:
Perfect
{100}
{100}
Fracture:
Step-Like
Density:
2.6 g/cm3 (Measured) 2.39 g/cm3 (Calculated)
Optical Data of Ivanyukite-Na-C
Type:
Isotropic
RI values:
n = 1.73(1)
Max Birefringence:
δ = 0.000 - Isotropic minerals have no birefringence
Surface Relief:
High
Chemical Properties of Ivanyukite-Na-C
Formula:
Na2Ti4(SiO4)3(OH)2O2 · 6H2O
Analytical Data:
electron microprobe, wt.%, water amount by the Penfield method; empirical formula basis: Si + Al = 3 apfu
Crystallography of Ivanyukite-Na-C
Crystal System:
Isometric
Class (H-M):
4 3m - Hextetrahedral
Space Group:
P4 3m
Cell Parameters:
a = 7.856(6) Å
Unit Cell Volume:
V 484.85 ų (Calculated from Unit Cell)
Z:
1
X-Ray Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 7.88 | (100) |
| 4.53 | (30) |
| 3.205 | (80) |
| 2.774 | (30) |
| 2.622 | (40) |
| 2.478 | (40) |
| 1.960 | (30) |
| 1.843 | (30) |
Type Occurrence of Ivanyukite-Na-C
General Appearance of Type Material:
cubic crystals, up to 1.5 mm in diameter
Geological Setting of Type Material:
natrolitized microcline-aegirine-sodalite lens within orthoclase-bearing urtite; formed from the polytype T by its partial hydration
Empirical Formula:
(Na1.17K0.94Ca0.03)∑2.14[(Ti3.32Fe0.21Nb0.15Mn0.03)∑3.71(Si2.97Al0.03)∑3.00O12.89(OH)2.87]·6.01H2O
Associated Minerals at Type Locality:
Relationship of Ivanyukite-Na-C to other Species
Member of:
Other Members of Group:
| Ivanyukite-Cu | CuTi4(SiO4)3(OH)2O2 · 7H2O |
| Ivanyukite-K | K2Ti4(SiO4)3(OH)2O2 · 9H2O |
| Ivanyukite-Na | Na2Ti4(SiO4)3(OH)2O2 · 6H2O |
Other Information
non-fluorescent
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 Ivanyukite-Na-C
Reference List:
Victor N. Yakovenchuk, Alexander P. Nikolaev, Ekaterina A. Selivanova, Yakov A. Pakhomovsky, Julia A. Korchak, Dar’ya V. Spiridonova, Oleg A. Zalkind, and Sergey V. Krivovichev (2009): Ivanyukite-Na-T, ivanyukite-Na-C, ivanyukite-K, and ivanyukite-Cu: New microporous titanosilicates from the Khibiny massif (Kola Peninsula, Russia) and crystal structure of ivanyukite-Na-T. American Mineralogist: 94: 1450–1458.
Internet Links for Ivanyukite-Na-C
mindat.org URL:
https://www.mindat.org/min-39653.html
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External Links:
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Localities for Ivanyukite-Na-C
This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the 
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(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.
Russia (TL) | |
| American Mineralogist, Volume 94, pages 1450–1458, 2009 |
Koashva Open Pit, Koashva Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia