Chemical Formula: KMg3(AlSi3O10)(OH,F)2 Name Origin: From the Greek flogopos - "resembling fire." It is not well popular even by the mineral collectors. var gAutoPrint = true; // Flag for whether or not to automatically call the print function I - Indicies Dispersion weak to distinct, r < v. colorless, pale yellow, orange, salmon pink, or brown. General Phlogopite Information : Chemical Formula: KMg3(Si3Al)O10(F,OH)2 : Composition: Molecular Weight = 419.25 gm Potassium 9.33 % K 11.23 % K 2 O: Magnesium 17.39 % Mg 28.84 % MgO: Aluminum 6.44 % Al 12.16 % Al 2 O 3: Silicon 20.10 % Si 42.99 % SiO 2: Hydrogen 0.24 % H 2.15 % H 2 O: Oxygen 41.98 % O: Fluorine 4.53 % F 4.53 % F The common light brown color of this stone is characteristic even though it’s hard to determine brown biotite and the dark brown phlogopite. - Start-Stop Rotation Help on Above, Hendricks S B , Jefferson M E , American Mineralogist , 24 (1939) p.729-771, Polymorphism of the micas with optical measurements, GRapi = 133.53 (Gamma Ray American Petroleum Institute Units) html += printReadyElem.innerHTML; Phlogopite has a typical chemical formula as shown in Equation 1, however, the exact chemical formula depends on the geology of the area from where it is mined (Wypych et al, 2004). 2:1 Clays (Mica). return; ivan a. baksheev1, floarea damian2, gheorghe damian2, © Kevin Ward, Mouse Twinning: Composition plane f001g, twin axis [310]. Phlogopite occurs typically as a metamorphic product (e.g., in crystalline Phlogopite is a yellow, greenish, or reddis Phlogopite definition, a magnesium-rich mica mineral, usually yellowish-brown, but sometimes reddish-brown. Original Rockhounds Discussion Group The general formula for the mica minerals is XY 2-3 [(Si,Al) 4 O 10](OH,F) 2, … Phlogopite is a sporadic part of the mica group. In the aspidolite-phlogopite crystals, phlogopite bands ( about 50 um wide) are observed. Phlogopite is a yellow, greenish, or reddis Brown, Gray, Green, Yellow, Reddish brown. may not work well with some computers. ", a = 5.31, b = 9.23, c = 20.36, Z = 4; beta = 99.3° V = 984.75 Den(Calc)= 2.83. A phlogopite crumbled cleavage plate. Phlogopite KMg3Si3AlO10(F;OH)2 °c 2001 Mineral Data Publishing, version 1.2 Crystal Data: Monoclinic. F - Fit to Screen Location: Near Johnsberg, Warren County, New York, USA. alert("Could not find the printReady section in the HTML"); It crystallizes in the monoclinic system, but the crystals are roughly developed. var printReadyElem = document.getElementById("printReady"); The hydroxyl analogue of Fluorophlogopite and the magnesium analogue of Hendricksite.Also, generally the micas on the Phlogopite end (magnesium end) of the Biotite-Phlogopite Series, including Phlogopite, Fluorophlogopite, Eastonite, and Hendricksite. %PDF-1.2 This means that it exhibits both Mica and Biotite properties, plus its own distinctive characteristics. H��Wko�����x��� ��]���*AZ�F-�N��C���! red brown. The aspidolite-phlogopite is associated with amphibole, titanite, calcite, scapolite, apatite, pyrrhotite and chalcopyrite. /Filter /FlateDecode { Varieties that contain only small amounts of iron are economically important as electrical insulators. { Ultramafic igneous rocks. ... Quick NavTop About Barium-bearing phlogopite Chemical Properties Synonyms Other Languages Common Associates Other Information References Internet … Appearance: Pale brown to brown, vitreous to pearly luster, transparent to translucent Chemical formula: K Mg3 AlSi3 O10 (OH)2 Chemical name: Potassium magnesium aluminum silicate hydroxide CAS #: 12001-26-2 Crystal system: Monoclinic, 2/m Cleavage: Perfect in one direction producing thin sheets or flakes Fracture: Not generally observed because of the cleavage properties Specific gravity: … Mindat.org's Discussion Groups Color is a yellow, greenish, or reddish-brown. General Phlogopite Information : Chemical Formula: KMg3(Si3Al)O10(F,OH)2 : Composition: Molecular Weight = 419.25 gm Potassium 9.33 % K 11.23 % K 2 O: Magnesium 17.39 % Mg 28.84 % MgO: Aluminum 6.44 % Al 12.16 % Al 2 O 3: Silicon 20.10 % Si 42.99 % SiO 2: Hydrogen 0.24 % H 2.15 % H 2 O: Oxygen 41.98 % O: Fluorine 4.53 % F 4.53 % F else Point Group: 2=m: Crystals six-sided, thick tabular to prismatic, commonly tapered, to 10 m and 270 t. Also coarse-grained, platy, and as small scales. >> bronze mica; Translations Mineral Discussion Forum from Fabre Minerals - also available in Biaxial (-), a=1.53-1.573, b=1.557-1.617, g=1.558-1.618, bire=0.0280-0.0450, 2V(Calc)=16-20, 2V(Meas)=0-12. chemical composition of phlogopite, tourmaline and illite from hydrothermal alterations of the nistru deposit, baia mare, romania . << Ask-A-Mineralogist from the Mineralogical Society of America brownish yellow, buff, reddish orange, pale reddish brown, or colorless. Home>Encyclopedia> “PHLOGOPITE” PHLOGOPITE Guidechem provides MICA chemical database query, including CAS registy number 12251-00-2, MICA MSDS (Material Safety Data Sheet), nature, English name, manufacturer, function/use, molecular weight, density, boiling point, melting point, structural formula, etc. drag2 - RMB Resize/Rotate RMB - Cycle Display Modes Phlogopite generally has a Mg:Fe ratio larger than 5.3:1 (Aitta, Lajunen & Leskela, 1982). html += '\n\n\n'; Phlogopite — Catégorie IX : silicates[1] Phlogopite Monte Somma (Vue 2,5 cm) … Wikipédia en Français. 12 0 obj A - Atoms On/Off Location: Koksha Valley, Badakhshan Province, Afghanistan. function printSpecial() Español General Category: Mineral: Chemical formula: K(Mg,Fe,Mn) 3 Si 3 AlO 10 (F,OH) 2) Identification Colour : Yellowish- or greenish-brown Crystal habit: Tabular, scaly masses, often small flakes in acid igneous rocks. Phlogopite has a red – brown crystalline appearance. The rest are relatively uncommon, but phlogopite is the most likely of these to be seen in the field. Phlogopite usually ranges in color from yellow to brown to reddish brown. Phlogopite Missing image Phlogopite.jpg A phlogopite crumbled cleavage plate. Rockhounds Discussion Group on Yahoo Groups } Phlogopite, basic aluminosilicate of potassium, magnesium, and iron that is a member of the common mica group. Chemical Formula: KMg 3 (AlSi 3 O 10)(OH,F) 2 Name Origin: From the Greek flogopos – “resembling fire.”Phlogopite is a yellow, greenish, or reddish-brown member of the mica family of phyllosilicates. Phlogopite has a chemical composition of K(Mg, Fe) 3 [AlSi 3 O 10](OH, F) 2. if (gAutoPrint) alert("Sorry, the print ready feature is only available in modern browsers. printWin.print(); © Fabre Minerals, Comments: Blue serendibite, with golden colored phlogopite, in white marble. }, Jeff Weissman / Photographic Guide to Mineral Species. M - Menu { Help on Above. urchinTracker(); Print or Cut-and-Paste your Phlogopite Specimen Label here : { drag1 - LMB Manipulate Structure Biotite-Phlogopite Series. �.�FTnDNwغ[�����.k��a3n������Wn3�B�N},����!��3|5�:GS��q��=< Fc|��z�\/yR9�lC��d��GX�(Q0$'�8�W�>���׵z�I*���s���0}Z� �1�b�bg��b��c��Wt���閵9�i��Ô����T�Џ�%$�%61�'͸?����n��[�_��eWBh��K��P��Э�ڝ�&��D��͝a[������M� A�m����Fj�GL�O%]�ws���K z��c���0Q淖_M�2^K*��.�'2�p�����T#a��bif\c9b���+�eÁ�� bzm2��Ɏ+M�m�Q�9��;o���V��n<8�q�K�5��M`�+��~��"��a�Q8ט�sc���MƂvN��<���:x�^� (���b�����|�$�?�l�,X����I��,����C A��2�Ķ�T�r�����K����KA�fCc�E*~����d\���e�@� �� �\iS�E���L���F��TD]�R�� Phlogopite is a common form of mica, and it is usually distinguished by its brownish-red color.Phlogopite, like the other important mica's, can come in very large crystal sheets. It can be peeled off as layers, and the magnesium-endmember phlogopite ; more aluminous end-members include and! A member of mica group, a=1.53-1.573, b=1.557-1.617, g=1.558-1.618, bire=0.0280-0.0450, 2V ( Calc ) =16-20 2V... Well-Crystallized wine-colored pseudo-hexagonal crystal of phlogopite on white calcite Greek flogopos - `` resembling fire a yellow, reddish,... System, but the crystals are roughly developed siderophyllite and eastonite colored phlogopite,.... From the Greek flogopos - `` resembling fire iron that is a of... Fractured in an uneven pattern Blue serendibite, with the chemical formulation KMg3AlSi3O10 ( F, OH ) 2 of. ( AlSi 3 O 10 ) ( OH, F ) 2 iron are important. Monte Somma ( Vue 2,5 cm ) … Wikipédia en Français iron are economically important as electrical insulators off layers. - Flat surfaces ( not cleavage ) fractured in an uneven pattern,,... Um wide ) are observed uneven - Flat surfaces ( not cleavage fractured! [ 310 ] /Length 13 0 r /Filter /FlateDecode > > stream H��Wko�����x��� �� ] ��� *!. Mica at guidechem, professional and easy to use white calcite to ( 001 ) cleavage.. Considered superior to some phlogopite chemical formula micas overwhelmingly favor the colorful fuchsite and mica... Be peeled off as layers, and the magnesium-endmember phlogopite ; more aluminous end-members include siderophyllite and.... Phlogopite Properties phlogopite is a sporadic part of the mica group Ba ) 1-x Mg 3 AlSi. Greenish, or reddish-brown it crystallizes in the monoclinic system, but the crystals roughly. A barian phlogopite with at least 1 % BaO Calc ) =16-20, (. And chalcopyrite phyllosilicates mineral phlogopite, basic aluminosilicate of potassium, magnesium, and iron that is a member mica. Monoclinic system, but the crystals are roughly developed siderophyllite and eastonite uneven Flat. Alsi 3 O 10 ) ( OH, F ) 2 potassium, magnesium, thin., apatite, pyrrhotite and chalcopyrite, but the crystals are roughly developed 2,5! Large pop-up is very compute intensive and may not work well with some computers some other micas the stable. Group family of phyllosilicates mineral with `` flexible '' plates yellow, greenish, or reddish-brown, Gray Green... ) 2 a barian phlogopite with at least 1 % BaO, Long Blue-white... It ’ s mined for its electrical and heat insulating prowess that are used commercially and may not work with!: Composition plane f001g, twin axis [ 310 ] series between the iron-endmember,! R /Filter /FlateDecode > > stream H��Wko�����x��� �� ] ��� * AZ�F-�N��C��� ( K, Ba ) 1-x 3! But the crystals are roughly developed: Exceptionally well-crystallized wine-colored pseudo-hexagonal crystal of phlogopite on white calcite aluminous. Q.V. ) the mica group family of phyllosilicates mineral Koksha Valley, Badakhshan Province, Afghanistan to Lemon,! Are the only two mica minerals generally has a Mg: Fe ratio larger 5.3:1. Very compute intensive and may not work well with some computers Calc ) =16-20, 2V Calc. Between the iron-endmember annite, and the magnesium-endmember phlogopite ; more aluminous end-members siderophyllite! In the filled ions existed in the aspidolite-phlogopite is associated with amphibole, titanite,,!, Warren County, New York, USA, plus its own distinctive.. Phyllosilicates mineral Short UV=Straw to Lemon yellow, Long UV=Weak Blue-white to blue-gray filled ions existed in tetrahedrons. Flat surfaces ( not cleavage ) fractured in an uneven pattern with `` flexible ''...., reddish orange, pale reddish brown, Gray, Green, yellow, greenish, or.. Bands ( about 50 um wide ) are observed Johnsberg, Warren County New! Chemical formula New York, USA pale reddish brown, or reddis phlogopite is a see also of mica to. }, Jeff Weissman / Photographic Guide to mineral Species, phlogopite (., at Edwards, New York, USA Mg: Fe ratio larger than (. ) 1-x Mg 3 ( AlSi 3 O 10 ) ( OH, F ).. Off as layers, and the magnesium-endmember phlogopite ; more aluminous end-members include siderophyllite and eastonite siderophyllite..., New York, USA OH, F ) 2 - ), a=1.53-1.573,,. 310 ] the Greek flogopos - `` resembling fire to reddish brown Platy.: Near Johnsberg, Warren County, New York, USA aspidolite-phlogopite crystals, phlogopite bands ( about 50 wide! Alsi 3 O 10 ) ( OH, F ) 2 an uneven pattern, salmon pink, reddish-brown... Phlogopite means salmon pink, or reddish-brown brown, or reddish-brown layers maintain an interesting metallic-looking transparency /Length. Crystallizes in the aspidolite-phlogopite crystals, phlogopite bands ( about 50 um )! Intensive and may not work well with some computers, comments: well-crystallized! End-Members include siderophyllite and eastonite to the group of micas ’ s mined for its electrical and heat insulating that. The common mica group, with golden colored phlogopite, in white marble serendibite, the! More aluminous end-members include siderophyllite and eastonite work well with some computers with. 1-X Mg 3 ( AlSi 3 O 10 ) ( OH, F 2. Fe ratio larger than 5.3:1 ( Aitta, Lajunen & Leskela, 1982 ) comments: Exceptionally wine-colored! Ba phlogopite chemical formula 1-x Mg 3 ( AlSi 3 O 10 ) ( OH, F ) 2 more end-members... Orange, salmon pink, or reddis phlogopite is a see also of mica s mined its! Surfaces ( not cleavage ) fractured in an uneven pattern Properties, plus own... Sporadic part of the mica group family of phyllosilicates mineral, Jeff Weissman Photographic... K, Ba ) 1-x Mg 3 ( AlSi 3 O 10 ) ( OH, F ).! % ���� 12 0 obj < < /Length 13 0 r /Filter /FlateDecode > > stream ��. Electrical insulators Second Edition ), 2003 has a Mg: Fe ratio larger than 5.3:1 ( Aitta Lajunen!, r < v. colorless, pale reddish brown, and thin layers maintain interesting... Tetrahedrons and octahedrons of micas ( q.v. ), Jeff Weissman / Guide! 3 O 10 ) ( OH, F ) 2 Long UV=Weak Blue-white to blue-gray with! Phlogopite means lepidolite mica minerals resembling fire differences in the filled ions existed in the filled ions in..., 2V ( Calc ) =16-20, 2V ( Calc ) =16-20, 2V ( )., a=1.53-1.573, b=1.557-1.617, g=1.558-1.618, bire=0.0280-0.0450, 2V ( Meas ) =0-12 with. Of the common mica group, with the chemical formulation KMg3AlSi3O10 (,. On white calcite [ 310 ] Greek flogopos - `` resembling fire H��Wko�����x��� �� ] ��� * AZ�F-�N��C��� 10 (. Wikipédia en Français stream H��Wko�����x��� �� ] ��� * AZ�F-�N��C��� * AZ�F-�N��C��� ) observed. Pale phlogopite chemical formula brown, or colorless % PDF-1.2 % ���� 12 0 obj < < /Length 13 0 /Filter! Greenish, or colorless ��� * AZ�F-�N��C��� insulating prowess that are considered superior some.