On tychite, a new mineral from Borax Lake, California, and on its artificial production and its relations to northupite

Penfield, S. L.; Jamieson, George S.

doi:10.2475/ajs.s4-20.117.217

Cited by 5 publications

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“…Tychite is another mineral first discovered in samples from Searles Lake (Penfield and Jamieson, 1905). It is the least abundant of the three magnesium-bearing minerals in Searles Lake and is found as disseminated crystals in the marginal facies of M-2, M-3, and M-5, in mud layers within S-2 and S-3, in the top few inches of the Bottom Mud, and in units A and D of the Mixed Layer.…”

Section: Tychite (2na2c03 2mgc03 Na2s04 )mentioning

confidence: 99%

Character and distribution of nonclastic minerals in the Searles Lake evaporite deposit, California

Smith¹,

Haines²

1964

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Section: Tychite (2na2c03 2mgc03 Na2s04 )mentioning

confidence: 99%

Character and distribution of nonclastic minerals in the Searles Lake evaporite deposit, California

Smith¹,

Haines²

1964

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“…Tychite belongs to the northupite group, where its analogues ferotychite Na 6 Fe 2 (CO 3 ) 4 SO 4 20 and manganotychite Na 6 Mn 2 (CO 3 ) 4 SO 4 21 are also found. The first mention of tychite was made by S. L. Penfield and G. S. Jamieson 22 during the study of northupite Na 3 Mg(CO 3 ) 2 Cl found in Lake Borax, California. 23 The authors also obtained synthetic tychite.…”

Section: Introductionmentioning

confidence: 99%

Comprehensive study of the synthetic tychite, Na₆Mg₂(CO₃)₄SO₄: synthesis, structure and conductive properties

Shindrov,

Morkhova

2024

Dalton Trans.

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“…Northup and described by Foote in 1895 [1] and Pratt in 1896 [2]. Its sulfate analogue, tychite, Na 6 Mg 2 (CO 3 ) 4 (SO 4 ), was described several years later from the same locality and the same sample [3,4]. Later, both minerals have been found in other saline lakes [5][6][7], e.g., Lake Katwe, Uganda [8].…”

Section: Introductionmentioning

confidence: 99%

The Crystal Structure of Manganotychite, Na6Mn2(CO3)4(SO4), and Structural Relations in the Northupite Group

et al. 2023

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The crystal structure of manganotychite has been refined using the holotype specimen from the Alluaiv Mountain, Lovozero massif, Kola peninsula, Russia. The mineral is cubic, Fd3¯, a = 14.0015(3) Å, V = 2744.88(18) Å3, Z = 8, R1 = 0.020 for 388 independently observed reflections. Manganotychite is isotypic to tychite and ferrotychite. Its crystal structure is based upon a three-dimensional infinite framework formed by condensation of MnO6 octahedra and CO3 groups by sharing common O atoms. The sulfate groups and Na+ cations reside in the cavities of the octahedral-triangular metal-carbonate framework. In terms of symmetry and basic construction of the octahedral-triangular framework, the crystal structure of manganotychite is identical to that of northupite, Na3Mg(CO3)2Cl. The transition northupite → tychite can be described as a result of the multiatomic 2Cl− → (SO4)2− substitution, where both chlorine and sulfate ions are the extra-framework constituents. However, the positions occupied by sulfate groups and chlorine ions correspond to different octahedral cavities within the skeletons of Na atoms. The crystal structure of northupite can be considered as an interpenetration of two frameworks: anionic [Mg(CO3)2]2− octahedral-triangular framework and cationic [ClNa3]2− framework with the antipyrochlore topology. Both manganotychite and northupite structure types can be described as a modification of the crystal structure of diamond (or the dia net) via the following steps: (i) replacement of a vertex of the dia net by an M4 tetrahedron (no symmetry reduction); (ii) attachment of (CO3) triangles to the triangular faces of the M4 tetrahedra (accompanied by the Fd3¯m → Fd3¯ symmetry reduction); (iii) filling voids of the resulting framework by Na+ cations (no symmetry reduction); and (iv) filling voids of the Na skeleton by either sulfate groups (in tychite-type structures) or chlorine atoms (in northupite). As a result, the information-based structural complexity of manganotychite and northupite exceeds that of the dia net.

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On tychite, a new mineral from Borax Lake, California, and on its artificial production and its relations to northupite

Cited by 5 publications

References 0 publications

Character and distribution of nonclastic minerals in the Searles Lake evaporite deposit, California

Character and distribution of nonclastic minerals in the Searles Lake evaporite deposit, California

Comprehensive study of the synthetic tychite, Na₆Mg₂(CO₃)₄SO₄: synthesis, structure and conductive properties

The Crystal Structure of Manganotychite, Na6Mn2(CO3)4(SO4), and Structural Relations in the Northupite Group

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On tychite, a new mineral from Borax Lake, California, and on its artificial production and its relations to northupite

Cited by 5 publications

References 0 publications

Character and distribution of nonclastic minerals in the Searles Lake evaporite deposit, California

Character and distribution of nonclastic minerals in the Searles Lake evaporite deposit, California

Comprehensive study of the synthetic tychite, Na6Mg2(CO3)4SO4: synthesis, structure and conductive properties

The Crystal Structure of Manganotychite, Na6Mn2(CO3)4(SO4), and Structural Relations in the Northupite Group

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Product

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Comprehensive study of the synthetic tychite, Na₆Mg₂(CO₃)₄SO₄: synthesis, structure and conductive properties