从结构拓扑到化学成分。制造。乌克兰Oktyabr'skii地块超群ts块体矿物NaBaMn4Ti2(Si2O7)2O2(OH)2F橄榄石晶体结构的修正及对顺霍岩体的质疑

IF 1.1 4区地球科学 Q3 MINERALOGY

Canadian Mineralogist Pub Date : 2021-06-14 DOI:10.3749/CANMIN.2000066

E. Sokolova, Maxwell C. Day, F. Hawthorne, A. Agakhanov, F. Cámara, Y. Uvarova, G. Ventura

{"title":"从结构拓扑到化学成分。制造。乌克兰Oktyabr'skii地块超群ts块体矿物NaBaMn4Ti2(Si2O7)2O2(OH)2F橄榄石晶体结构的修正及对顺霍岩体的质疑","authors":"E. Sokolova, Maxwell C. Day, F. Hawthorne, A. Agakhanov, F. Cámara, Y. Uvarova, G. Ventura","doi":"10.3749/CANMIN.2000066","DOIUrl":null,"url":null,"abstract":"\n The crystal structure of perraultite from the Oktyabr'skii massif, Donetsk region, Ukraine (bafertisite group, seidozerite supergroup), ideally NaBaMn4Ti2(Si2O7)2O2(OH)2F, Z = 4, was refined in space group C to R1 = 2.08% on the basis of 4839 unique reflections [Fo > 4σFo]; a = 10.741(6), b = 13.841(8), c = 11.079(6) Å, α = 108.174(6), β = 99.186(6), γ = 89.99(1)°, V = 1542.7(2.7) Å3. Refinement was done using data from a crystal with three twin domains which was part of a grain used for electron probe microanalysis. In the perraultite structure [structure type B1(BG), B – basic, BG – bafertisite group], there is one type of TS (Titanium-Silicate) block and one type of I (Intermediate) block; they alternate along c. The TS block consists of HOH sheets (H – heteropolyhedral, O – octahedral). In the O sheet, the ideal composition of the five [6]MO sites is Mn4apfu. There is no order of Mn and Fe2+ in the O sheet. The MH octahedra and Si2O7 groups constitute the H sheet. The ideal composition of the two [6]MH sites is Ti2apfu. The TS blocks link via common vertices of MH octahedra. The I block contains AP(1,2) and BP(1,2) cation sites. The AP(1) site is occupied by Ba and the AP(2) site by K > Ba; the ideal composition of the AP(1,2) sites is Ba apfu. The BP(1) and BP(2) sites are each occupied by Na > Ca; the ideal composition of the BP(1,2) sites is Na apfu. We compare perraultite and surkhobite based on the work of Sokolova et al. (2020) on the holotype sample of surkhobite: space group C, R1 = 2.85 %, a = 10.728(6), b = 13.845(8), c = 11.072(6) Å, α = 108.185(6), β = 99.219(5), γ = 90.001(8)°, V = 1540.0(2.5) Å3; new EPMA data. We show that (1) perraultite and surkhobite have identical chemical composition and ideal formula NaBaMn4Ti2(Si2O7)2O2(OH)2F; (2) perraultite and surkhobite are isostructural, with no order of Na and Ca at the BP(1,2) sites. Perraultite was described in 1991 and has precedence over surkhobite, which was redefined as “a Ca-ordered analogue of perraultite” in 2008. Surkhobite is not a valid mineral species and its discreditation was approved by CNMNC IMA (IMA 20-A).","PeriodicalId":9455,"journal":{"name":"Canadian Mineralogist","volume":"1 1","pages":""},"PeriodicalIF":1.1000,"publicationDate":"2021-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":"{\"title\":\"From Structure Topology to Chemical Composition. XXIX. Revision of the Crystal Structure of Perraultite, NaBaMn4Ti2(Si2O7)2O2(OH)2F, a Seidozerite-Supergroup TS-Block Mineral from the Oktyabr'skii Massif, Ukraine, and Discreditation of Surkhobite\",\"authors\":\"E. Sokolova, Maxwell C. Day, F. Hawthorne, A. Agakhanov, F. Cámara, Y. Uvarova, G. Ventura\",\"doi\":\"10.3749/CANMIN.2000066\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"\\n The crystal structure of perraultite from the Oktyabr'skii massif, Donetsk region, Ukraine (bafertisite group, seidozerite supergroup), ideally NaBaMn4Ti2(Si2O7)2O2(OH)2F, Z = 4, was refined in space group C to R1 = 2.08% on the basis of 4839 unique reflections [Fo > 4σFo]; a = 10.741(6), b = 13.841(8), c = 11.079(6) Å, α = 108.174(6), β = 99.186(6), γ = 89.99(1)°, V = 1542.7(2.7) Å3. Refinement was done using data from a crystal with three twin domains which was part of a grain used for electron probe microanalysis. In the perraultite structure [structure type B1(BG), B – basic, BG – bafertisite group], there is one type of TS (Titanium-Silicate) block and one type of I (Intermediate) block; they alternate along c. The TS block consists of HOH sheets (H – heteropolyhedral, O – octahedral). In the O sheet, the ideal composition of the five [6]MO sites is Mn4apfu. There is no order of Mn and Fe2+ in the O sheet. The MH octahedra and Si2O7 groups constitute the H sheet. The ideal composition of the two [6]MH sites is Ti2apfu. The TS blocks link via common vertices of MH octahedra. The I block contains AP(1,2) and BP(1,2) cation sites. The AP(1) site is occupied by Ba and the AP(2) site by K > Ba; the ideal composition of the AP(1,2) sites is Ba apfu. The BP(1) and BP(2) sites are each occupied by Na > Ca; the ideal composition of the BP(1,2) sites is Na apfu. We compare perraultite and surkhobite based on the work of Sokolova et al. (2020) on the holotype sample of surkhobite: space group C, R1 = 2.85 %, a = 10.728(6), b = 13.845(8), c = 11.072(6) Å, α = 108.185(6), β = 99.219(5), γ = 90.001(8)°, V = 1540.0(2.5) Å3; new EPMA data. We show that (1) perraultite and surkhobite have identical chemical composition and ideal formula NaBaMn4Ti2(Si2O7)2O2(OH)2F; (2) perraultite and surkhobite are isostructural, with no order of Na and Ca at the BP(1,2) sites. Perraultite was described in 1991 and has precedence over surkhobite, which was redefined as “a Ca-ordered analogue of perraultite” in 2008. Surkhobite is not a valid mineral species and its discreditation was approved by CNMNC IMA (IMA 20-A).\",\"PeriodicalId\":9455,\"journal\":{\"name\":\"Canadian Mineralogist\",\"volume\":\"1 1\",\"pages\":\"\"},\"PeriodicalIF\":1.1000,\"publicationDate\":\"2021-06-14\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"2\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Canadian Mineralogist\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://doi.org/10.3749/CANMIN.2000066\",\"RegionNum\":4,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"MINERALOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Canadian Mineralogist","FirstCategoryId":"89","ListUrlMain":"https://doi.org/10.3749/CANMIN.2000066","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MINERALOGY","Score":null,"Total":0}

引用次数: 2

摘要

乌克兰顿涅茨克地区Oktyabr'skii地块(钡长石群，钡长石超群)的透武长石晶体结构，理想为NaBaMn4Ti2(Si2O7)2O2(OH)2F, Z = 4，在空间群C中根据4839次独特反射[Fo > 4σFo]，将其细化为R1 = 2.08%;= 10.741 (6), b = 13.841 (8), c = 11.079(6),α= 108.174(6),β= 99.186(6),γ= 89.99(1)°,V = 1542.7 (2.7) A3。细化是使用数据从晶体的三个双畴，这是用于电子探针微分析晶粒的一部分。在透武质构造[构造类型B1(BG)、B -基性、BG -杂灰岩群]中，存在TS(硅酸钛)型块体和I(中间)型块体各1种;TS区由HOH片(H -异多面体，O -八面体)组成。在O层中，5个[6]MO位的理想组成是Mn4apfu。O片中Mn和Fe2+没有顺序。MH八面体和Si2O7基团构成H层。两个b[6]MH位点的理想组合是Ti2apfu。TS块通过MH八面体的公共顶点连接。I区包含AP(1,2)和BP(1,2)阳离子位点。AP(1)位点被Ba占据，AP(2)位点被k> Ba占据;AP(1,2)位点的理想组合是Ba apfu。BP(1)和BP(2)位点均由Na > Ca占据;BP(1,2)位点的理想组成是Na apfu。根据Sokolova et al.(2020)的研究成果，我们比较了透玄石与顺石:空间群C, R1 = 2.85%， a = 10.728(6)， b = 13.845(8)， C = 11.072(6) Å， α = 108.185(6)， β = 99.219(5)， γ = 90.001(8)°，V = 1540.0(2.5) Å3;新的EPMA数据。结果表明:(1)过孔石与顺石英具有相同的化学成分和理想配方NaBaMn4Ti2(Si2O7)2O2(OH)2F;(2)在BP(1,2)的位置上，过玄武岩和顺面岩体是等构造的，没有Na和Ca的顺序。peraulite于1991年被描述，优先于顺滑石，后者在2008年被重新定义为“钙阶peraulite的类似物”。surkhobit不是一种有效的矿物，已通过CNMNC IMA (IMA 20-A)的认定。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

查看原文本刊更多论文

From Structure Topology to Chemical Composition. XXIX. Revision of the Crystal Structure of Perraultite, NaBaMn4Ti2(Si2O7)2O2(OH)2F, a Seidozerite-Supergroup TS-Block Mineral from the Oktyabr'skii Massif, Ukraine, and Discreditation of Surkhobite

The crystal structure of perraultite from the Oktyabr'skii massif, Donetsk region, Ukraine (bafertisite group, seidozerite supergroup), ideally NaBaMn4Ti2(Si2O7)2O2(OH)2F, Z = 4, was refined in space group C to R1 = 2.08% on the basis of 4839 unique reflections [Fo > 4σFo]; a = 10.741(6), b = 13.841(8), c = 11.079(6) Å, α = 108.174(6), β = 99.186(6), γ = 89.99(1)°, V = 1542.7(2.7) Å3. Refinement was done using data from a crystal with three twin domains which was part of a grain used for electron probe microanalysis. In the perraultite structure [structure type B1(BG), B – basic, BG – bafertisite group], there is one type of TS (Titanium-Silicate) block and one type of I (Intermediate) block; they alternate along c. The TS block consists of HOH sheets (H – heteropolyhedral, O – octahedral). In the O sheet, the ideal composition of the five [6]MO sites is Mn4apfu. There is no order of Mn and Fe2+ in the O sheet. The MH octahedra and Si2O7 groups constitute the H sheet. The ideal composition of the two [6]MH sites is Ti2apfu. The TS blocks link via common vertices of MH octahedra. The I block contains AP(1,2) and BP(1,2) cation sites. The AP(1) site is occupied by Ba and the AP(2) site by K > Ba; the ideal composition of the AP(1,2) sites is Ba apfu. The BP(1) and BP(2) sites are each occupied by Na > Ca; the ideal composition of the BP(1,2) sites is Na apfu. We compare perraultite and surkhobite based on the work of Sokolova et al. (2020) on the holotype sample of surkhobite: space group C, R1 = 2.85 %, a = 10.728(6), b = 13.845(8), c = 11.072(6) Å, α = 108.185(6), β = 99.219(5), γ = 90.001(8)°, V = 1540.0(2.5) Å3; new EPMA data. We show that (1) perraultite and surkhobite have identical chemical composition and ideal formula NaBaMn4Ti2(Si2O7)2O2(OH)2F; (2) perraultite and surkhobite are isostructural, with no order of Na and Ca at the BP(1,2) sites. Perraultite was described in 1991 and has precedence over surkhobite, which was redefined as “a Ca-ordered analogue of perraultite” in 2008. Surkhobite is not a valid mineral species and its discreditation was approved by CNMNC IMA (IMA 20-A).

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

Canadian Mineralogist 地学-矿物学

CiteScore

2.20

自引率

22.20%

发文量

审稿时长

4-8 weeks

期刊介绍： Since 1962, The Canadian Mineralogist has published papers dealing with all aspects of mineralogy, crystallography, petrology, economic geology, geochemistry, and applied mineralogy.