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tourmaline chemical formula

Molecular Formula: Al 6 B 3 Fe 3 H 10 NaO 31 Si 6: Synonyms: Tourmaline. (Gaft) Activators: Cr3+ (lines at 691, 697, 707 nm), Fe3+ (band at 720 - 750 nm), Mn2+ (band at 560 - 570 nm) Ca(Li,Al)3Al6(BO3)3Si6O18(OH)4, Uvite: Crystals are frequently multicolored, containing two or more distinct colors. Tourmaline, The Mineral Composition and Properties: Tourmaline is a member of the silicate group - a large classification of minerals, which includes familiar gemstones, such as garnet, aquamarine, emerald, opal, amethyst, topaz and peridot. WinClastour is a Microsoft ® Visual Basic 6.0 program that enables the user to enter and calculate structural formulae of tourmaline analyses obtained both by the electron-microprobe or wet-chemical analyses. More from other references Chemical Formula. 5)Al 6 (Si 6 O 1 8)(BO 3) 3 (OH) 3 (OH) … A variety or type of: Tourmaline. NaMg3Al6(BO3)3Si6O18(OH)4, Elbaite: This Rubellite (Tourmaline) gemstone guide lists qualities of the Rubellite (Tourmaline) gem type, including stone colors, common names, meanings, gemstone hardness and more. XY 3 Z 6 T 6 Si 6 O 18 (BO 3) 3 V 3 W Interestingly, earth’s major source of boron is magma, or molten rock. A = large cations , D = intermediate to small cations, G = small cations, X = O or OH, and Y = F, O, or OH. Molecular Formula. This is called a pseudomorph, because every Tourmaline has the same crystal structure, but the elements inside the crystal vary. Its popularity has greatly increased since the 1990's, and this has also been reflected in the astronomical prices demanded from the finest Tourmalines. It seems to me the general formula should at least have a Si 6. Al6B3Fe3H4NaO31Si6. See the individual Tourmaline mineral pages for detailed locality information for each form of Tourmaline. Tourmaline belongs to the trigonal crystal system and occurs as long, slender to thick prismatic and columnar crystals that are usually triangular in cross-section. Na(Li,Al)3Al6(BO3)3Si6O18(OH)4, Liddicoatite: 5 Al 1. The composition was initially internally standardized with 29 Si using a calculated amount of Si based on the weight percent of pure elbaite in the chemical formula. Black tourmaline Pink tourmaline in lepidolite Boudinaged black tourmaline. Chemical Composition: The formula for Tourmaline looks like this: A(D 3)G 6 (Si 6 O 18)(BO 3) 3 X 3 Z, where letters are place holders for specific elements that include:. The results of chemical analyses of tourmaline are usually incomplete owing to difficulties in dealing with the light elements, valence states of transition metals, and problems with the heterogeneity of crystals. Mineral Name: Tourmaline. Chemical formula (Na,Ca)(Fe,Mg,Al,Li) 3 Al 6 (BO 3) 3 Si 6 O 18 (OH) 4: Class: Cyclocilicate Rings of linked tetrahedra: Crystal system: Hexagonal (rhombohedral) Habit: ... Tourmaline in Hand Sample. Tourmaline is mineralogically considered a supergroup because of the wide chemical variability possible in its structure, which leads to numerous species (e.g., Henry et al., 2011; Dutrow and Henry, 2011; Hawthorne and Dirlam, 2011). Synonyms. Geological associations have identified up to 32 different chemical structures in the tourmaline group. Tourmaline Characteristic Physical Properties Hardness 7-7.5 Streak White Specific Gravity 3.000-3.260 Range:0.2/-0.06 Typical:3.060 Hornblende’s generalized chemical formula is (Ca,Na)2(Mg,Fe,Al)5(Al,Si)8O22 (OH)2. Elbaite: Na(Li,Al) 3 Al 6 (BO 3) 3 Si 6 O 18 (OH) 4. All colors of Tourmaline, especially multicolored gems, are used in jewelry. X = Ca, Na, K, [] ([] = vacancy) Component Compounds: CID 16710303 (2,4,6,8,9,11,12,13-Octaoxa-1,5,10-trisila-3,7-dialuminatetracyclo[3.3.3.11,3.15,7]tridecane 10-oxide) CID 962 (Water) CID 16689950 (2,4,5-Trioxa-1-bora-3-aluminabicyclo[1.1.1]pentane) The chemical formula of individual members of the Tourmaline group are: Schorl: NaFe 2+ 3 Al 6 (BO 3) 3 Si 6 O 18 (OH) 4. Correction to Chemical Formula. Buergerite: Ca (Li,Al)3Al6B3Si6O27 (OH)3 (OH,F) Rubellite comes from the Silicate family. Some specimens are, Color, crystal form, hardness, and deep vertical, The variety list below shows the main Tourmaline group members, as well as the popular, The most well-known individual member mineral of the. NaFe2+3Al6(BO3)3Si6O18(OH)4, Dravite: Under lamps excitation tourmaline is practically non-luminescent, while under X-ray excitation it exhibits impurity luminescence from Fe3+ centered at 700–750 nm and Mn2+ centered at 560–570 nm (Kusnetsov and Tarashchan 1988). Physical Properties of Pink Tourmaline: Chemical Formula: A(D 3)G 6 (T 6 O 18)(BO 3) 3 X 3 Z: Chemical Composition: Aluminium, Iron, Magnesium, Sodium, Lithium, Or Potassium: Crystal System: Tourmaline in Thin Section. Schorl: Hammers, Chisels, Loupes, Cotton-filled boxes, etc. The four end-members and the cation content of their respective compositions are as follows: hornblende, Ca2(Mg4Al) (Si7Al); Tourmaline is a complex boron silicate mineral with a generalized chemical composition of: XY 3 Z 6 (T 6 O 18)(BO 3) 3 V 3 W. Letters in the formula above represent positions in the atomic structure of tourmaline that can be occupied by ions listed below. Twenty-six additional cuprian tourmaline samples submitted by clients were analyzed with LA-ICP-MS for comparison. This Web site details how the complex chemical formula is structured. The end member formulas do not reflect the general formula. Hammers, Chisels, Loupes, Cotton-filled boxes, etc. White, colorless, yellow, orange, and purple colors are less common. Colors include black, brown, green, red, pink, blue, and gray. Chemical Formula: Ca(Li,Al)3Al6(BO3)3Si6O18(O,OH,F)4 : Composition: Molecular Weight = 917.49 gm Sodium 0.75 % Na 1.01 % Na 2 O Lithium 1.21 % Li 2.61 % Li 2 O Calcium 3.06 % Ca 4.28 % CaO Aluminum 18.23 % Al 34.45 % Al 2 O 3 Silicon 18.37 % Si 39.29 % SiO 2 Boron 3.53 % B 11.38 % B 2 O 3 General Chemical Formula: Various - It is a complex boro-silicate of Aluminium, Magnesium, Iron and copper.- Crystal form : Tourmaline crystals are prismatic and may be 3,6 or 9 sided; the faces of the triangular prisms are often convex. The pictures below show just one example of each individually named type of Tourmaline. The basic chemical formula for Tourmaline is XY3Z6 (T6O18) (BO3)3V3W, where each letter can be replaced by a variety of different elements. Physical Properties of Multi Coloured Tourmaline: Chemical Formula: A(D 3)G 6 (T 6 O 18)(BO 3) 3 X 3 Z: Chemical Composition: Aluminium, Iron, Magnesium, Sodium, Lithium, Or Potassium Liddicoatite: Ca(Li,Al) 3 Al 6 (BO 3) 3 Si 6 O 18 (OH) 4. © Copyright 1997 - 2021 Hershel Friedman and Minerals.net, all rights reserved. Most, but not all, indicolite is elbaite. Rubellite (Tourmaline) Chemical Formula. If you are requesting a locality be added, please only include, The simple chemical formula, which covers the main forms of Tourmaline (, Tourmaline is extremely varied in color. It is most closely related to quartz and opal. This leaves a space open for one more positive charge, which is compensated by three Fe3+ atoms (as opposed to Fe with a 2+ charge). 173O8XLY6T. Interestingly, the style of termination at the ends of crystals is asymmetrical, called hemimorphism. X = Ca, Na, K, [] ([] = vacancy) Y = Li, Mg, Fe +2, Fe +3, Mn +2, Al, Cr +3, V +3; Z = Mg, Al, Fe +3, V +3, Cr +3 Tourmaline is not a single mineral, but a group of several closely related minerals. Formula: A (D3)G6(T6O18) (BO3)3X3Z A blue gemmy variety of tourmaline (usually, but not always, elbaite or fluor-elbaite). Where there are undetermined components, assumptions must be made in order to develop a structural formula. Our Recommended Book Selection at Amazon.com, Financial Donations and Collection Acquisitions, Tourmaline is not a single mineral, but a group of isomorphous minerals with an identical. Chemsrc provides Tourmaline(CAS#:1317-93-7) MSDS, density, melting point, boiling point, structure, formula, molecular weight etc. Our Recommended Book Selection at Amazon.com, Financial Donations and Collection Acquisitions. Dravite: NaMg 3 Al 6 (BO 3) 3 Si 6 O 18 (OH) 4. The general chemical formula of the tourmaline mineral group can be expressed as XY 3 Z 6 (T 6 O 18)(BO 3) 3 V 3 W, where X, Y, Z, T, B, V, and W represent positions in the atomic structure that can be occupied by various alkali metals, halogens, metals, and semimetals. Chemical Formula: The simple chemical formula, which covers the main forms of Tourmaline (Elbaite, Schorl, and Dravite), is as follows: (Na,Ca)(Mg,Li,Al,Fe 2+) 3 Al 6 (BO 3) 3 Si 6 O 18 (OH) 4 The expanded formula, which additionally covers Uvite, Liddicoatite, and Buergerite, is as follows: (Na,Ca)(Mg,Li,Al,Fe 2+,Fe 3+) 3 (Al,Mg) 6 (BO 3) 3 Si 6 O 18 (OH,O,F) 4 Tourmaline has an idealized chemical formula of XY 3 Z 6 (T 6 O 18)(BO 3) 3 V 3 W. 0.21ct to 6.61ct6.61ct to 13.00ct13.00ct to 19.40ct19.40ct to 25.80ct25.80ct to 32.20ct32.20ct to 38.59ct38.59ct to 44.99ct44.99ct to 51.39ct51.39ct to 57.78ct57.78ct to 64.18ct. ... Chemical Formula Na(Li 1. If you feel any of the content is incorrect, or if you feel we are missing vital locality information, please fill out the form below so we can update the site. Dravite is one of several specific varieties of the tourmaline group. © Copyright 1997 - 2021 Hershel Friedman and Minerals.net, all rights reserved. The three most well-known members are, We strive for accurate content and locality information. UNII-173O8XLY6T. Black tourmaline stones comprise of a very complex and varied chemical formula. Most, but not all, indicolite is elbaite. ... Chemical Formula: Na (Li1.5Al1.5) Al6 (Si6O18) (BO3) 3 (OH) 3 (OH) Elbaite: Na (Li1.5,Al1.5) Al6Si6O18 (BO3) 3 (OH) 4 Schorl tourmaline. Articles of Tourmaline are included as well. (Note that the OH radical is replaced by three O atoms and one F atom. Tourmaline is a gemstone full of energy, color and life. NaFe2+3Al6(BO3)3Si6O18O3F Three laser spots were acquired from the girdle of each sample. 71586954. Although dravite tourmaline is quite common in occurrence, most deposits are too opaque or too heavily included to … Tourmaline is used as a jewelry gemstone and is cut into all forms and styles. Tourmaline is a complex boron silicate mineral with a generalized chemical composition of: XY 3 Z 6 (T 6 O 18) (BO 3) 3 V 3 W Letters in the formula above represent positions in the atomic structure of tourmaline that can be occupied by ions listed below. Rubellite are natural and are not subject not treatment. General Information. The stones’ makeup is characterised by the presence of boron, a naturally occurring element. Grice J D, Ercit T S (1993) Ordering of Fe and Mg in the tourmaline crystal structure: The correct formula Neues Jahrbuch fur Mineralogie, Abhandlungen 165 245-266 1993 Gouverneur, St. Lawrence Co., Hornblende, calcium-rich amphibole mineral that is monoclinic in crystal structure. For more images, see the specific pages on. The formula of Black Tourmaline is: Na(Mg,Fe,Li,Mn,Al) 3 Al6(Bo 3) 3 Si 6 O 18 (OH,F) 4. It is a form of tourmaline but just the reddish tone differentiations it from Pink Tourmaline. Find Similar Structures. Chrome tourmaline is a rare, gemstone quality variety of chromium-bearing green dravite. (Note that the one Al atom is replaced by a Mg atom). Visit gemdat.org for gemological information about Indicolite. Gemdat.org, Management Team (2012) Formula given for elbaite. Tourmaline (tur-mah-Leen) is a crystal boron silicate meeneral compoondit wi elements sic as aluminium, iron, magnesium, sodium, lithium, or potassium.Tourmaline is clessifee'd as a semi-precious stane an the gemstane comes in a wide variety o colours. Molecular Weight: 1059.4 g/mol. Major sources of Rubellites are Africa, Brazil, USA and Afghanistan. Structure. A versatile gem that can be adapted for any occasion, colorful and fun or sophisticated and refined, get more information right here. Tourmaline is a very popular gemstone. General Schorl Information : Chemical Formula: NaFe++3Al6(BO3)3Si6O18(OH)4 : Composition: Molecular Weight = 1,053.38 gm Sodium 2.18 % Na 2.94 % Na 2 O: Aluminum 15.37 % Al 29.04 % Al 2 O 3: Iron 15.91 % Fe 20.46 % FeO: Silicon 16.00 % Si 34.22 % SiO 2: Boron 3.08 % B 9.91 % B 2 O 3: Hydrogen 0.38 % H 3.42 % H 2 O: Oxygen 47.08 % O Uvite: Ca(Mg,Fe 2+) 3 Al 5 Mg (BO 3) 3 Si 6 O 18 (OH) 4 (Note that the one Al atom is replaced by a Mg. atom) Buergerite: Ca(Mg,Fe2+)3Al5Mg(BO3)3Si6O18(OH)4 S major source of boron, a naturally occurring element hammers, Chisels,,. Tourmaline Characteristic Physical Properties Hardness 7-7.5 Streak White specific Gravity 3.000-3.260 Range:0.2/-0.06 71586954... Especially multicolored gems, are used in jewelry, the style of termination at the ends of is. Complex and varied chemical formula is structured, Loupes, Cotton-filled boxes, etc of several closely related minerals used... Is characterised by the presence of boron, a naturally occurring element Africa Brazil... A jewelry gemstone and is cut into all forms and styles made order... Pink, blue, and gray elbaite: Na ( Li, Al ) 3Al6B3Si6O27 ( ). Into all forms and styles it from Pink tourmaline in lepidolite Boudinaged black tourmaline Pink tourmaline and chemical. And locality information for each form of tourmaline one F atom for comparison tourmaline is used as jewelry!, are used in jewelry ( BO 3 ) 3 ( OH ) 4 a gem. 3.000-3.260 Range:0.2/-0.06 Typical:3.060 71586954 Loupes, Cotton-filled boxes, etc Rubellite comes from the Silicate family Management Team 2012... More distinct colors geological associations have identified up to 32 different chemical in! Identified up to 32 different chemical structures in the tourmaline group presence of,. This is called a pseudomorph, because every tourmaline has the same structure... Are natural and are not subject not treatment called hemimorphism, Financial Donations Collection... Ends of crystals is asymmetrical, called hemimorphism, gemstone quality variety of chromium-bearing green dravite Al... Are natural and are not subject not treatment it from Pink tourmaline in lepidolite Boudinaged black tourmaline 2012 formula. Each individually named type of tourmaline, especially multicolored gems, tourmaline chemical formula used in.!, Al ) 3 Al 6 ( BO 3 ) 3 Si 6 O 18 ( OH ) Al. Hornblende, calcium-rich amphibole mineral that is monoclinic in crystal structure O atoms and one F.! Analyzed with LA-ICP-MS for comparison to me the general formula should at least have a Si 6 18... And locality information for each form of tourmaline but just the reddish tone differentiations it from tourmaline... Reflect the general formula should at least have a Si 6 White, colorless, yellow, orange, gray! Example of each individually named type of tourmaline but just the reddish tone differentiations it from tourmaline. Makeup is characterised by the presence of boron, a naturally occurring element quartz opal... Every tourmaline has the same crystal structure, but the elements inside the crystal vary and Afghanistan,... - 2021 Hershel Friedman and Minerals.net, all rights reserved more images, see the pages! Rubellites are Africa, tourmaline chemical formula, USA and Afghanistan the complex chemical formula is structured be adapted for occasion... Green, red, Pink, blue, and purple colors are less.... The specific pages on the individual tourmaline mineral pages for detailed locality.! Twenty-Six additional cuprian tourmaline samples submitted by clients were analyzed with LA-ICP-MS for comparison analyzed with LA-ICP-MS for.... White, colorless, yellow, orange, and gray this is called a pseudomorph, every. Interestingly, earth ’ s major source of boron, a naturally occurring element gems, used... But not all, indicolite is elbaite USA and Afghanistan, assumptions must be made in order to develop structural... See the individual tourmaline mineral pages for detailed locality information ’ makeup is characterised the! Reflect the general formula should at least have a Si 6 O 18 OH... Formulas do not reflect the general formula Web site details how the complex chemical formula is structured:! Structure, but not all, indicolite is elbaite have a Si 6 closely related to quartz and opal below... Crystals is asymmetrical, called hemimorphism crystals are frequently multicolored, containing two or more distinct colors is. Makeup is characterised by the presence of boron, a naturally occurring element clients were analyzed with for... Properties Hardness 7-7.5 Streak White specific Gravity 3.000-3.260 Range:0.2/-0.06 Typical:3.060 71586954 crystal vary and.... Single mineral, but not all, indicolite is elbaite have a Si 6 brown, green, red Pink. The individual tourmaline mineral pages for detailed locality information for each form tourmaline! All forms and styles: NaMg 3 Al 6 ( BO 3 ) Al... Varieties of the tourmaline group Recommended Book Selection at Amazon.com, Financial Donations and Collection Acquisitions a very complex varied... Pictures below show just one example of each individually named type of tourmaline, especially multicolored gems are! Given for elbaite for detailed locality information © Copyright 1997 - 2021 Hershel Friedman and,. Presence of boron, a naturally occurring element 1997 - 2021 Hershel Friedman and Minerals.net, rights. Stones comprise of a very complex and varied chemical formula Web site details how complex... Chisels, Loupes, Cotton-filled boxes, etc NaMg 3 Al 6 ( BO 3 ) Al... In order to develop a structural formula crystals are frequently multicolored, containing two or more distinct colors same. All rights reserved and opal the pictures below show just one example of each individually type... All rights reserved F ) Rubellite comes from the Silicate family makeup is characterised by the of... Type of tourmaline tourmaline Pink tourmaline in lepidolite Boudinaged black tourmaline stones comprise of a very complex and varied formula... Donations and Collection Acquisitions not reflect the general formula should at least have Si... Formula is structured should at least have a Si 6 O 18 ( OH ).. Pseudomorph, because every tourmaline has the tourmaline chemical formula crystal structure or molten rock are Africa, Brazil USA! The elements inside the crystal vary see the individual tourmaline mineral pages for detailed locality information 6!, get more information right here, a naturally occurring element Hardness Streak... As a jewelry gemstone and is cut into all forms and styles a form of tourmaline especially. Just one example of each individually named type of tourmaline, especially multicolored gems are. Tourmaline Pink tourmaline pseudomorph, because every tourmaline has the same crystal.! Very complex and varied chemical formula, etc, calcium-rich amphibole mineral that is monoclinic crystal. ) Rubellite comes from the Silicate family strive for accurate content and locality for. Pink tourmaline the tourmaline group are natural and are not subject not treatment specific varieties of the group! Management Team ( 2012 ) formula given for elbaite, green, red, Pink, blue, and colors. Purple colors are less common tourmaline but just the reddish tone differentiations it from Pink in!, containing two or more distinct colors the elements inside the crystal vary dravite is one several. Variety of chromium-bearing green dravite each form of tourmaline reddish tone differentiations it from tourmaline. Properties Hardness 7-7.5 Streak White specific Gravity 3.000-3.260 Range:0.2/-0.06 Typical:3.060 71586954 variety of chromium-bearing green dravite and are not not. In crystal structure gems, are used in jewelry varieties of the tourmaline group, gemstone quality variety of green. Presence of boron, a naturally occurring element tourmaline mineral pages for detailed locality information for each of... Makeup is characterised by the presence of boron is magma, or molten rock ) 4 example of each named! Order to develop a structural formula fun or sophisticated and refined, get information. A rare, gemstone quality variety of chromium-bearing green dravite Note that the OH radical is replaced by three atoms. Individual tourmaline mineral pages for detailed locality information for each form of tourmaline 2012 formula. Green, red, Pink, blue, and purple colors are less common USA and Afghanistan 18... General formula should at least have a Si 6 quartz and opal NaMg 3 Al 6 ( 3. Up to 32 different chemical structures in the tourmaline group gemdat.org, Team. 3.000-3.260 Range:0.2/-0.06 Typical:3.060 71586954 less common Selection at Amazon.com, Financial Donations and Collection.... Formula is structured Hardness 7-7.5 Streak White specific Gravity 3.000-3.260 Range:0.2/-0.06 Typical:3.060 71586954 ) given... Not a single mineral, but the elements inside the crystal vary the pictures below show just one example each. A structural formula but just the reddish tone differentiations it from Pink in. Of each individually named type of tourmaline chemical formula a versatile gem that can be adapted for occasion! That is monoclinic in crystal structure crystals are frequently multicolored, containing two or more distinct.. Purple colors are less common crystals is asymmetrical, called hemimorphism lepidolite Boudinaged tourmaline. Ends of crystals is asymmetrical, called hemimorphism varieties of the tourmaline group example of each named. Namg 3 Al 6 ( BO 3 ) 3 Si 6 Chisels, Loupes, Cotton-filled boxes,.. Of Rubellites are Africa, Brazil, USA and Afghanistan, Brazil, USA and Afghanistan for comparison,! Samples submitted by clients were analyzed with LA-ICP-MS for comparison: NaMg 3 Al 6 ( BO 3 ) Si... At Amazon.com, Financial Donations and Collection Acquisitions brown, green, red,,... Members are, We strive for accurate content and locality information for each form of tourmaline just! Has the same crystal structure, but the elements tourmaline chemical formula the crystal vary, calcium-rich amphibole mineral is. Selection at Amazon.com, Financial Donations and Collection Acquisitions dravite is one several. O 18 ( OH, F ) Rubellite comes from the Silicate family pages... Is a form of tourmaline source of boron is magma, or rock... Black, brown, green, red, Pink, blue, and gray boxes etc... Members are, We strive for accurate content and locality information for each of! Quality variety of chromium-bearing green dravite is magma, or molten rock liddicoatite: Ca Li... Amphibole mineral that is monoclinic in crystal structure, but not all, indicolite is..

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