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Table 1 Structure parameters of the (La_0.97RE_0.01Yb_0.02)₂(OH)₄SO₄·2H₂O layered compounds obtained in this work and La₂(OH)₄SO₄∙2H₂O·(SO₄ ²⁻-LLaH) [17]

From: (La_0.97RE_0.01Yb_0.02)₂O₂S Nanophosphors Converted from Layered Hydroxyl Sulfate and Investigation of Upconversion Photoluminescence (RE=Ho, Er)

Sample	Sp.Gr.	a, Å	b, Å	c, Å	β, °	V, Å³
RE=Ho	C2/m	16.8447	3.9268	6.4227	90.535	424.816
RE=Er	C2/m	16.8411	3.9256	6.4217	90.522	424.530
SO₄ ²⁻-LLaH	C2/m	16.8847	3.9420	6.4359	90.454	428.363

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