A Purple Barium Copper Silicate Pigment from Early China

FitzHugh, Elisabeth West; Zycherman, Lynda A.

doi:10.2307/1506342

Cited by 22 publications

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“…The first known artificial pigment is the Egyptian Blue 1 (2 nd millennium BC). Chinese also elaborate a blue/purple pigment found on pottery 2,3 and the terra cotta soldiers of the First Emperor of Qin 4 . Production of Maya Blue in the pre-Colombian MesoAmerica constitutes another example of the know-how of the ancient people 5,6 .…”

Section: Introductionmentioning

confidence: 99%

Diffusion Of Indigo Molecules Inside The Palygorskite Clay Channels

et al. 2011

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The search for durable dyes led several past civilizations to develop artificial pigments. Maya Blue (MB), manufactured in pre-Columbian Mesoamerica, is one of the best known examples of an organic-inorganic hybrid material. Its durability is due to the unique association of indigo molecule and palygorskite, a particular fibrous clay occurring in Yucatan. Despite 50 years of sustained interest, the microscopic structure of MB and its relation to the durability remain open questions. Combining new thermogravimetric and synchrotron X-ray diffraction analyses, we show that indigo molecules can diffuse into the channel of the palygorskite during the heating process, replacing zeolitic water and stabilizing the room temperature phases of the clay.

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Section: Introductionmentioning

confidence: 99%

Diffusion Of Indigo Molecules Inside The Palygorskite Clay Channels

et al. 2011

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“…The answers to this challenge are Chinese Blue and Chinese Purple, also known as Han Blue and Han Purple. [16] Compared with Egyptian Blue these pigments contain the homologue element barium instead of calcium. [8,17,18] They are chemical compounds of the composition BaCuSi 4 O 10 [19] and BaCuSi 2 O 6 .…”

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“…[20] The samples investigated so far came from blue and purple octagonal dye rods, most probably used as a commodity for paint production. [16,18] Chinese Blue and Purple were also found in pigment layers from the Terracotta Army (Figure 1) [6,14,18,21] or applied for the staining of glasses. [22] Some samples date back to the ™Warring States∫ period (479 ± 221 BC).…”

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Chemistry in Ancient Times: The Development of Blue and Purple Pigments

Berke

2002

Angew. Chem. Int. Ed.

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“…BaCuSi2O6 is known as Han purple, a pigment already used by Chinese artists centuries ago 1,2,3 . Interestingly, studies have shown that it is a quasi-two dimensional spin dimer system.…”

Section: Introductionmentioning

confidence: 99%

Crystal Growth with Oxygen Partial Pressure of the BaCuSi₂O₆ and Ba_1–xSr_xCuSi₂O₆ Spin Dimer Compounds

Well

Puphal

Wehinger

et al. 2016

Crystal Growth & Design

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BaCuSi2O6 is a quasi-two dimensional spin dimer system and a model material for studying Bose-Einstein condensation (BEC) of magnons in high magnetic fields. The new Ba1-xSrxCuSi2O6 mixed system, which can be grown with x ≤ 0.3, and BaCuSi2O6, both grown by using a crystal growth method with enhanced oxygen partial pressure, have the same tetragonal structure (I41/acd) at room temperature. The mixed system shows no structural phase transition, so that the tetragonal structure is stable down to low temperatures. The oxygen partial pressure acts as control parameter for the growth process. A detailed understanding of the crystal structure depending on the oxygen content will enable the study of the spin dynamics of field-induced order states in this model magnetic compound of high current interest with only one type of dimer layers, which shows the same distance between the Cu atoms, in the structure.

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A Purple Barium Copper Silicate Pigment from Early China

Cited by 22 publications

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Diffusion Of Indigo Molecules Inside The Palygorskite Clay Channels

Diffusion Of Indigo Molecules Inside The Palygorskite Clay Channels

Chemistry in Ancient Times: The Development of Blue and Purple Pigments

Crystal Growth with Oxygen Partial Pressure of the BaCuSi₂O₆ and Ba_1–xSr_xCuSi₂O₆ Spin Dimer Compounds

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A Purple Barium Copper Silicate Pigment from Early China

Cited by 22 publications

References 0 publications

Diffusion Of Indigo Molecules Inside The Palygorskite Clay Channels

Diffusion Of Indigo Molecules Inside The Palygorskite Clay Channels

Chemistry in Ancient Times: The Development of Blue and Purple Pigments

Crystal Growth with Oxygen Partial Pressure of the BaCuSi2O6 and Ba1–xSrxCuSi2O6 Spin Dimer Compounds

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Product

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Crystal Growth with Oxygen Partial Pressure of the BaCuSi₂O₆ and Ba_1–xSr_xCuSi₂O₆ Spin Dimer Compounds